CN106769742B - Dust suppressant and dust suppressant dedusting effect testing device and testing method - Google Patents
Dust suppressant and dust suppressant dedusting effect testing device and testing method Download PDFInfo
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Abstract
The invention discloses a dust suppressant and dust suppressant dedusting effect testing device and a testing method, wherein the testing device comprises a data acquisition and processing device, a simulation roadway device, a dust generating device, a dust suppressant spraying device and a dust removing device; the test method comprises the following steps: 1. preparing dust which is not soaked in the dust suppressant solution; 2. preparing dust soaked in the dust suppressant solution; 3. measuring the concentration of dust in air in the simulated roadway; 4. conveying dust which is not soaked in the dust suppressant solution and measuring the concentration of the dust in the simulated roadway; 5. starting a dust suppressant spraying device and measuring the concentration of dust in the simulated roadway when dust which is not soaked in the dust suppressant solution is conveyed; 6. conveying dust soaked in the dust suppressant solution and measuring the dust concentration in the simulated roadway; 7. starting a dust suppressant spraying device and measuring the concentration of dust in the simulated roadway when the dust soaked in the dust suppressant solution is conveyed; 8. and processing data and obtaining the dust removal efficiency. The invention can test the dust removal effect of the dust suppressant and the dust remover.
Description
Technical Field
The invention belongs to the technical field of dust control, and particularly relates to a device and a method for testing the dust removal effect of a dust suppressant and a dust suppressant.
Background
In recent years, with economic development and technical improvement, the coal mining technology of China is correspondingly improved, but dust still exists in the coal mining process, and the dust is one of five disasters of a mine, so that the physical health of workers is threatened, and the safe and green production of the mine is influenced. Coal mine dust is various rock and ore particles generated in all links of coal mining, accumulation, transportation, processing and utilization, and mainly is rock dust and coal dust. Along with the continuous development of the coal industry, the degree of mechanized operation is increased, the coal mining strength is continuously increased, the dust amount in the operation processes of rock drilling, blasting, loading and unloading, transportation and the like is increased, the environment of an operation place is seriously polluted, if the rock dust and the coal dust in a roadway cannot be eliminated in time, harm can be caused, and if workers suck a large amount of dust for a long time, diseases can be easily caused; in addition, if dust is deposited in a coal mine tunnel, the dust reacts with oxygen in air in a mine rapidly, dust explosion occurs, however, the dust explosion generates high temperature and high pressure, and generates a large amount of toxic and harmful gas, so that equipment in the tunnel in the coal mine is damaged, casualties are caused, related coal mine accidents are caused, the whole mine is damaged, and safety production and life safety of personnel are threatened seriously. Therefore, the dust suppression agent and the dust-proof agent are adopted in the coal mine tunnel to treat dust at present, which is very important.
However, at present, a set of related testing device and testing method capable of testing and testing the dust removal effect of the dust suppressant and the dust remover on the dust in the coal mine tunnel does not exist in the market, the dust removal effect cannot be comprehensively and effectively tested and evaluated, and objective and accurate basis cannot be provided for selecting proper dust suppressant and dust remover. Therefore, a dust suppression agent and dust prevention agent dust removal effect testing device and a testing method which are simple and convenient to operate, reasonable in design and good in using effect are needed, the dust suppression agent and dust prevention agent and the dust suppression agent and dust prevention agent dust removal effect in a coal mine tunnel can be accurately tested, the dust removal effect can be comprehensively and effectively tested and evaluated, and objective and accurate basis is provided for selecting proper dust suppression agent and dust prevention agent.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a dust suppression agent and dust prevention agent dust removal effect testing device which is simple in structure, reasonable in design, simple and convenient to operate and good in using effect, can obtain the dust removal efficiency of the dust suppression agent, the dust removal efficiency of the dust prevention agent and the dust removal efficiency of the dust suppression agent and the dust prevention agent, can accurately test the dust removal effect of the dust suppression agent, the dust prevention agent and the dust suppression agent and the dust prevention agent in a coal mine tunnel, comprehensively and effectively test and evaluate the dust removal effect, provides objective and accurate basis for selecting proper dust suppression agent and dust prevention agent, and is strong in practicability.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a press down dirt agent, dust keeper dust removal effect testing arrangement which characterized in that: the device comprises a data acquisition and processing device, a simulation roadway device for simulating an actual coal mine roadway, a dust generating device for conveying dust into the simulation roadway device, a dustproof agent spraying device for removing dust in the simulation roadway device and a dust removing device, wherein the data acquisition and processing device comprises a microcontroller and a communication module which is connected with the microcontroller and is in two-way communication with a computer, the input end of the microcontroller is connected with a dust sensor for detecting the concentration of dust in the simulation roadway device, and the output end of the microcontroller is connected with a display;
dust generating device includes to cubic coal sample, rock or gangue treat that broken material carries out broken breaker, with the breaker is connected and right the powder after the breaker is broken carries out the sieve of screening and right the dust that the sieve was selected is saved and is connected with the dust box that the air outlet of air-blower is connected, the air-blower is controlled by microcontroller, air-blower and dust box all are located the entry end of simulation tunnel device, dust sensor's quantity is a plurality of, and is a plurality of dust sensor is followed the length direction of simulation tunnel device and is laid, and adjacent two dust sensor's horizontal interval is 2m ~ 2.5m, dust sensor sprinkler includes the liquid reserve tank that contains dust agent solution, is connected with the liquid reserve tank and carries the water pump of dust agent solution in the liquid reserve tank, is connected with the water pump and sets up on the simulation tunnel device and carries out the atomising head that removes dust, be provided with flowmeter, pressure detection unit and relief pressure valve on the transfer line, the atomising head and dust sensor lays, the quantity of atomising head is a plurality of many the length direction of laying the top and the length direction of the atomising head carries out the dust removal in simulation tunnel device and the atomizer and the little the dust sensor is reached the crisscross pressure detection of two, and the microcontroller output is all met with 2.5m ~ 2.5 pressure detection unit and transfer line pressure detection unit, the transfer line, the input of transfer line, the spray pipe and the microcontroller and the output are all met.
Foretell dust suppressant, dust suppressant dust removal effect testing arrangement which characterized in that: the dust removal device comprises a fan for removing dust from residual dust in the simulation tunnel device, an air duct connected with an air outlet of the fan and used for conveying the residual dust in the simulation tunnel device, and a water tank connected with the air duct and used for adsorbing the dust in the air duct, wherein the front side of an air inlet of the fan is provided with an air adjusting plate for adjusting the air quantity in the simulation tunnel device, and the fan is controlled by a microcontroller.
Foretell dust suppressant, dust keeper dust removal effect testing arrangement, its characterized in that: the simulation roadway device is formed by splicing a plurality of sections of simulation roadways, the structures and the sizes of the plurality of sections of simulation roadways are the same, and the adjacent two sections of simulation roadways are connected in a sealing manner through sealing glue; the simulation tunnel is the similar simulation material who is used for simulating actual coal mine tunnel country rock, the simulation tunnel includes the tunnel top, is connected and is located two sides of the tunnel of the left and right sides respectively and is connected with the tunnel bottom of two tunnel group bottoms, tunnel top and two group integrated into one piece in tunnel.
Foretell dust suppressant, dust keeper dust removal effect testing arrangement, its characterized in that: the tunnel top is provided with the preformed hole, the tunnel top is the arch, the quantity of preformed hole is a plurality of.
Foretell dust suppressant, dust keeper dust removal effect testing arrangement, its characterized in that: the preformed hole is including the first preformed hole that is used for installing dust sensor and the second preformed hole that is used for installing the atomising head, every all install two dust sensors in the first preformed hole, every all install two atomising heads, two in the second preformed hole vertical interval between the dust sensor is 0.1m, two vertical interval between the atomising head is 0.1m.
Foretell dust suppressant, dust keeper dust removal effect testing arrangement, its characterized in that: the data acquisition and processing device further comprises a human-computer input interface, and the human-computer input interface is connected with the microcontroller.
Meanwhile, the invention also discloses a dust removal effect test method of the dust suppressant and the dust suppressant, which has the advantages of simple method steps, reasonable design, convenient realization, high test speed and good use effect, and is characterized in that: the method comprises the following steps:
step one, preparing dust without soaking a dust suppressant solution: the dust generating device is adopted to prepare the dust which is not soaked in the dust suppressant solution, and the process is as follows:
crushing a substance to be crushed by using the crusher to obtain first powder, screening the first powder, putting the screened first powder into a thermostat for constant-temperature drying treatment to obtain a first dust sample, weighing two parts of first dust with the same mass from the first dust sample, and putting the two parts of the first dust into two dust boxes respectively; the first dust is not soaked in the dust suppressant solution, and the two dust boxes containing the first dust are respectively called a first dust box and a second dust box;
step two, preparing dust soaked in the dust suppressant solution: the dust generator is adopted to prepare dust soaked in the dust suppressant solution, and the process is as follows:
firstly, putting a substance to be crushed into a dust suppressant mixed solution, fishing out the substance to be crushed until the substance to be crushed is soaked by the dust suppressant mixed solution, and crushing the substance to be crushed soaked by the dust suppressant mixed solution by using a crusher to obtain second powder; screening the second powder, and putting the screened second powder into a thermostat for constant-temperature drying treatment to obtain a second dust sample; then weighing two parts of second dust with the same mass from the second dust sample and respectively putting the two parts of second dust into two dust boxes; the second dust is dust soaked in the dust suppressant solution, and the two dust boxes containing the second dust are respectively called a third dust box and a fourth dust box;
measuring the concentration of dust in air in the simulated roadway: a plurality of dust sensors detect the air dust concentration in the simulation tunnel device respectively and transmit the air dust concentration of a plurality of test points that detect to the microcontroller, and the microcontroller transmits the air dust concentration of a plurality of test points that it received to the computer through communication module again, and the computer receives and takes notes the air dust concentration of a plurality of test points to take notes the air dust concentration of a plurality of test points as the air dust concentration rho of each test point 0 ；
And step four, conveying the dust which is not soaked in the dust suppressant solution, and measuring the dust concentration in the simulated roadway: after the first dust box in the first step is installed, operating a computer to send blast air through a communication moduleA machine starting signal is sent to a microcontroller, the microcontroller controls an air blower to be started to enable first dust in the first dust box to enter a simulated roadway device, and the microcontroller controls the air blower to be closed until the first dust in the first dust box is blown clean; meanwhile, in the process of conveying dust which is not soaked in a dust suppressant solution into the simulation roadway device, the dust sensor performs first real-time detection on the dust concentration in the simulation roadway device, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller, the microcontroller transmits the received dust concentrations at the plurality of test points to the computer in real time through the communication module, the computer receives and records the dust concentrations at the plurality of test points at each sampling moment, the computer is adopted to arrange the dust concentrations at the plurality of sampling moments at each test point according to the time sequence, when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling moment in two adjacent sampling moments is recorded as the first dust concentration rho at the test point 1 Closing the dust sensor, and opening the dust removal device to remove residual dust in the simulated roadway device for 60-120 min;
and step five, starting a dustproof agent spraying device and measuring the dust concentration in the simulated roadway when the dust which is not soaked in the dust suppressant solution is conveyed: after the second dust box in the first step is installed, the operation computer sends a blower starting signal and a dustproof agent spraying device starting signal to the microcontroller through the communication module, the microcontroller controls the blower to be started to enable first dust in the second dust box to enter the simulated roadway device, the microcontroller controls the dustproof agent spraying device to work, and the microcontroller controls the blower and the dustproof agent spraying device to be closed until the first dust in the second dust box is completely blown; simultaneously, open the in-process that dust remover sprinkler removed dust in to simulating the tunnel device when carrying the dust that does not soak dust suppressant solution in the tunnel device, dust sensor carries out the second real-time detection to the dust concentration in simulating the tunnel device to give microcontroller, microcontroller with the dust concentration transmission of a plurality of test points department that detect, microcontrollerTransmitting the received dust concentrations of a plurality of test points to a computer in real time through a communication module, receiving and recording the dust concentrations of the plurality of test points at each sampling moment by the computer, arranging the dust concentrations of the plurality of test points at each test point according to the time sequence by the computer, indicating that the dust concentration of the test point is stable when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, and recording the dust concentration of the later sampling moment of the two adjacent sampling moments as a second dust concentration rho at the test point 2 Closing the dust sensor, and opening the dust removal device to remove residual dust in the simulated roadway device for 60-120 min;
conveying the dust soaked in the dust suppressant solution and measuring the dust concentration in the simulated roadway: after the third dust box in the second step is installed, operating a computer to send a blower starting signal to a microcontroller through a communication module, controlling the blower to be started by the microcontroller to enable second dust in the third dust box to enter a roadway simulating device, and controlling the blower to be closed by the microcontroller until the second dust in the third dust box is blown clean; meanwhile, in the process of conveying dust soaked with dust suppressant solution into the simulation roadway device, the dust sensor carries out third real-time detection on the dust concentration in the simulation roadway device, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller, the microcontroller transmits the dust concentrations at the plurality of test points received by the microcontroller to the computer in real time through the communication module, the computer receives and records the dust concentrations at the plurality of test points at each sampling moment, the computer is adopted to arrange the dust concentrations at the plurality of test points according to the time sequence, when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling moment in the two adjacent sampling moments is recorded as a third dust concentration rho at the test point 3 Closing the dust sensor, and starting a dust removal device to remove residual dust in the simulation roadway device for 60-120 min;
seventhly, conveying the powder soaked in the dust suppressant solutionOpen dust keeper sprinkler and measure the dust concentration in the simulation tunnel during dirt: after the fourth dust box in the second step is installed, the operation computer sends a blower starting signal and a dustproof agent spraying device starting signal to the microcontroller through the communication module, the microcontroller controls the blower to be started to enable second dust in the fourth dust box to enter the simulated roadway device, the microcontroller controls the dustproof agent spraying device to work, and the microcontroller controls the blower and the dustproof agent spraying device to be closed until the second dust in the fourth dust box is completely blown; meanwhile, in the process of opening a dust suppressant spraying device to remove dust in the simulation roadway device when dust soaked with a dust suppressant solution is conveyed into the simulation roadway device, the dust sensor carries out fourth-time real-time detection on the dust concentration in the simulation roadway device, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller, the microcontroller transmits the received dust concentrations at the plurality of test points to the computer in real time through the communication module, the computer receives and records the dust concentrations at the plurality of test points at each sampling moment, the computer is adopted to arrange the dust concentrations at the plurality of sampling moments at each test point according to the time sequence, when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling moment in the two adjacent sampling moments is recorded as the fourth dust concentration rho at the test point 4 Closing the dust sensor, and starting a dust removal device to remove residual dust in the simulation roadway device for 60-120 min;
step eight, data processing and dust removal efficiency obtaining: adopting the computer to measure the air dust concentration rho in the third step 0 And the first dust concentration data rho in the fourth step 1 And the second dust concentration data rho in the fifth step 2 According to the formula
Obtaining the concentration change rate R of each test point 1 And adopting the computer to measure the concentration change rate R at each test point 1 Performing average value measurementCalculating to obtain the dust removal efficiency of the dust-proof agent, and synchronously displaying the dust removal efficiency through a display;
adopting the computer to measure the air dust concentration rho in the third step 0 And the first dust concentration data rho in the fourth step 1 And the third dust concentration data rho in the sixth step 3 According to the formula
Obtaining the concentration change rate R of each test point 2 And using said computer to change the concentration rate R at each test point 2 The average value is calculated, so that the dust removal efficiency of the dust suppressant can be obtained and synchronously displayed through a display;
adopting the computer to measure the air dust concentration rho in the third step 0 And the first dust concentration data rho in the fourth step 1 And the fourth dust concentration data ρ in step seven 4 According to the formula
Obtaining the concentration change rate R of each test point 3 And adopting the computer to measure the concentration change rate R at each test point 3 And calculating the average value to obtain the dust removal efficiency of the dust suppressant and the dust suppressant, and synchronously displaying the dust suppression efficiency and the dust suppressant through a display.
The above method is characterized in that: the material to be crushed comprises a blocky coal sample, rock or coal gangue;
the granularity of the first powder screened in the first step and the granularity of the second powder screened in the second step are both smaller than 200 meshes, the constant-temperature drying treatment temperature is 40-50 ℃, and the constant-temperature drying treatment time is 20-30 h.
The above method is characterized in that: the specific process of opening the dust removal device to remove the residual dust in the simulated roadway device in the fourth step to the seventh step is as follows: the operation computer sends a dust removal and removal starting signal to the microcontroller through the communication module, the microcontroller controls the fan to work, and residual dust in the simulation tunnel device is conveyed to the water tank through the air duct to be adsorbed;
and step five and step seven, the specific process of opening the dustproof agent spraying device to remove dust in the simulation roadway device is as follows: the operation computer sends dustproof agent sprinkler start signal through communication module, and microcontroller control dustproof agent sprinkler water pump work, and the water pump passes through the transfer line with dustproof agent solution in the liquid storage tank and carries to the atomising head, and the atomising head begins to spray the dust removal.
The above method is characterized in that: before the microcontroller controls a water pump in the dustproof agent spraying device to work in the fifth step and the seventh step, the operation computer sends a flow adjusting signal and a pressure adjusting signal to the microcontroller through the communication module, the microcontroller adjusts the flow of the infusion tube through the water pump, and the microcontroller controls the pressure of the infusion tube to be adjusted through the pressure reducing valve.
Compared with the prior art, the invention has the following advantages:
1. the dust suppression agent and dust prevention agent dust removal effect testing device is simple in structure, reasonable in design, simple and convenient to install and arrange and low in investment cost.
2. The dust suppression agent and dust prevention agent dedusting effect testing device is simple and convenient to use and operate, and manpower and material resources consumed by testing are few.
3. The adopted dust suppressant, the dust suppressant dedusting effect testing device is simple and convenient to operate and good in using effect, dust is prepared and conveyed into the simulation roadway device by arranging the dust generating device, the dust is used for simulating the generation of dust in a coal mine roadway, the air concentration in the simulation roadway device is detected by adopting the dust sensor under the regulation testing condition, the dust concentration in the simulation roadway device is respectively detected for the first time, the second time, the third time and the fourth time by adopting the dust sensor, the dedusting efficiency of the dust suppressant and the dust suppressant can be obtained through computer processing, the dust suppressant dedusting effect can be simply and conveniently and quickly realized, the dedusting effect of the dust suppressant and the dust suppressant are tested, and the testing process is easy to control.
4. The adopted dust generation device has reasonable structural design, simple and convenient use and operation and good dust preparation effect, can realize the crushing of massive coal samples, rocks or coal gangues, realizes the preparation of various different dusts, and simulates the generation of different dusts, in addition, the worker is far away from the test site, and the injury of the worker is avoided.
5. The adopted dust suppressant and dust suppressant dedusting effect testing device can realize the testing of the dedusting effects of the dust suppressant and dust suppressant under the conditions of different dust suppressants, different dust suppressants and dust suppressants, different dust suppressant solution concentrations, different flow rates, different dust and the like, has strong flexibility and wide application range, thereby providing basis for analyzing the suppression effects of the dust suppressants and the dust suppressants on different dust and providing theoretical basis for formulating scientific dedusting technical schemes.
6. The dust suppression agent and dust prevention agent dust removal effect testing device is high in testing accuracy, can perform dust removal treatment on residual dust in the simulation roadway device, guarantees cleanness of the simulation roadway device after each test, and avoids interference on the next test.
7. The adopted dust suppressant and dust suppressant dust removal effect testing device is good in using effect and high in testing intelligence degree, in the testing process, the dust concentration is automatically recorded through the data acquisition and processing device, the data of the test record is processed to obtain the dust removal efficiency and is provided for a tester, the tester is provided with a basis for researching the dust suppressant and dust suppressant dust removal effect test, and experimental evidence can be provided for the tester to select the dust suppressant and the dust suppressant to remove dust.
8. The adopted dust suppressant and dust suppressant dedusting effect testing method has the advantages of simple steps, reasonable design, convenience in implementation, high testing speed, good using effect, no need of manual operation, data recording and processing, high efficiency, accuracy in testing, safe and reliable testing process, realization of evaluation and analysis of the dedusting effect of the dust suppressant and dust suppressant, and objective and accurate basis for selecting proper dust suppressant and dust suppressant.
In conclusion, the invention has the advantages of reasonable design, simple and convenient operation and good use effect, can obtain the dust removal efficiency of the dust suppressant, the dust removal efficiency of the dust suppressant and the dust suppression efficiency of the dust suppressant and the dust suppressant, can accurately test the dust removal effect of the dust suppressant, the dust suppressant and the dust suppressant in a coal mine tunnel, comprehensively and effectively test and evaluate the dust removal effect, provides objective and accurate basis for selecting proper dust suppressant and dust suppressant, and has strong practicability.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a dust suppression agent and dust control agent dust removal effect testing device of the present invention.
FIG. 2 is a schematic block diagram of a circuit of a dust suppression agent and dust control agent dust removal effect testing device according to the present invention.
Fig. 3 is a schematic structural diagram of a roadway simulating device in the dust suppression agent and dust prevention agent dust removal effect testing device of the invention.
FIG. 4 is a flow chart of a method for testing the dust removal effect of the dust suppressant and the dust suppressant according to the present invention.
Description of reference numerals:
1-a dust generating device; 2, a blower; 3-dust box;
4-a crusher; 5, screening; 6-dust sensor;
8, a microcontroller; 9-a dust-repellent spray device;
10-preparing holes; 11-a communication module; 12-a computer;
13-a water pump; 14-a pressure reducing valve; 15-a spray head;
16-a transfusion tube; 17-a liquid storage tank; 18-a flow meter;
19-a pressure detection unit; 20-a human-machine input interface; 21 — a display;
22-dust removal device; 23, a fan; 24-air volume adjusting plate;
25-a water tank; 26-an air duct; 27-simulating a roadway device;
28-top of roadway; 29-roadway bottom; 30-two sides of the roadway.
Detailed Description
As shown in fig. 1, 2 and 3, a dust suppression agent, dust control agent dust removal effect test apparatus is described by example 1.
Example 1
As shown in fig. 1 and fig. 2, the dust suppression agent and dust prevention agent dust removal effect testing device of the invention comprises a data acquisition processing device, a simulation tunnel device 27 for simulating an actual coal mine tunnel, a dust generating device 1 for conveying dust in the simulation tunnel device 27, a dust prevention agent spraying device 9 for removing dust from dust in the simulation tunnel device 27, and a dust removal device 22, wherein the data acquisition processing device comprises a microcontroller 8 and a communication module 11 connected with the microcontroller 8 and in bidirectional communication with a computer 12, the input end of the microcontroller 8 is connected with a dust sensor 6 for detecting the concentration of dust in the simulation tunnel device 27, and the output end of the microcontroller 8 is connected with a display 21;
the dust generating device 1 comprises a crusher 4 for crushing blocky coal samples, rocks or coal gangues, a screen 5 for screening the powder crushed by the crusher 4 and a dust box 3 for storing the dust screened by the screen 5 and connecting with an air outlet of the air blower 2, wherein the air blower 2 is controlled by a microcontroller 8, the air blower 2 and the dust box 3 are both positioned at the inlet end of a simulation roadway device 27, the number of the dust sensors 6 is multiple, the dust sensors 6 are arranged along the length direction of the simulation roadway device 27, and the horizontal distance between every two adjacent dust sensors 6 is 2 m-2.5 m, dustproof agent sprinkler 9 is including the liquid storage tank 17 that contains dustproof agent solution, be connected with liquid storage tank 17 and carry the liquid storage tank 17 in the water pump 13 of dustproof agent solution, the transfer line 16 of being connected with water pump 13 and set up on transfer line 16 and to simulate the atomising head 15 that 27 interior dust removed, be provided with flowmeter 18, pressure detection unit 19 and relief pressure valve 14 on the transfer line 16, atomising head 15 with dust sensor 6 is crisscross to be laid, the quantity of atomising head 15 is a plurality of, and is a plurality of atomising head 15 lays along the length direction at tunnel top 28, and adjacent two atomising head 15's horizontal separation is 2m ~ 2.5m, dust sensor 6, flowmeter 18 and pressure detection unit 19 all meet with microcontroller 8's input, relief pressure valve 14 and water pump 13 all meet with microcontroller 8's output.
As shown in fig. 1 and fig. 2, in this embodiment, the dust removing device 22 includes a fan 23 for removing dust from residual dust in the analog tunnel device 27, an air duct 26 connected to an air outlet of the fan 23 and used for conveying the residual dust in the analog tunnel device 27, and a water tank 25 connected to the air duct 26 and used for adsorbing the dust in the air duct 26, an air volume adjusting plate 24 for adjusting an air volume in the analog tunnel device 27 is disposed at a front side of an air inlet of the fan 23, and the fan 23 is controlled by the microcontroller 8.
As shown in fig. 3, in this embodiment, the simulation roadway device 27 is formed by splicing multiple sections of simulation roadways, the structures and the sizes of the multiple sections of simulation roadways are the same, and two adjacent sections of simulation roadways are connected in a sealing manner by a sealant; the simulation roadway is made of similar simulation materials for simulating actual coal mine roadway surrounding rock, the simulation roadway comprises a roadway top 28, two roadway sides 30 which are connected with the roadway top 28 and located on the left side and the right side respectively, and a roadway bottom 29 which is connected with the bottoms of the two roadway sides 30, and the roadway top 28 and the two roadway sides 30 are integrally formed.
In this embodiment, tunnel top 28 is provided with preformed hole 10, tunnel top 28 is the arch, the quantity of preformed hole 10 is a plurality of.
In this embodiment, preformed hole 10 is including the first preformed hole that is used for installing dust sensor 6 and the second preformed hole that is used for installing atomising head 15, every all install two dust sensors 6 in the first preformed hole, every all install two atomising heads 15, two in the second preformed hole vertical interval between dust sensor 6 is 0.1m, two vertical interval between atomising head 15 is 0.1m.
In this embodiment, the data acquisition and processing device further includes a human-machine input interface 20, and the human-machine input interface 20 is connected with the microcontroller 8.
In this embodiment, this testing arrangement simple structure, reasonable in design and installation are laid portably, and the input cost is lower, uses easy and simple to handle, and the manpower and materials that the test consumes are few.
In the embodiment, the dust generating device 1 is arranged to prepare dust and convey the dust into the simulation roadway device, the dust generating device is used for simulating the generation of dust in the coal mine roadway 27, the dust sensor 6 is used for detecting the air concentration in the simulation roadway device 27 under the regulation test condition, the dust sensor 6 is used for respectively detecting the dust concentration in the simulation roadway device 27, the dust removal efficiency of the dust suppressant and the dust suppression agent and dust suppressant can be obtained through the processing of the computer 12, the dust suppression effect of the dust suppressant, the dust removal effect of the dust suppressant and the dust suppression agent and dust suppressant can be simply, conveniently and rapidly realized, and the test process is easy to control.
In this embodiment, set up the breakage that dust generating device 1 can realize cubic coal sample, rock or gangue, realize the preparation of multiple different dust to the production of the different dust of simulation, in addition, the staff keeps away from the test scene, avoids causing the staff injury.
In this embodiment, through setting up the dust removal device 22, can carry out the dust removal to the remaining dust in the simulation tunnel device 27 and handle, guarantee the cleanness of simulation tunnel device 27 after testing at every turn, avoid the interference to next test, improve the test accuracy.
In this embodiment, by setting the microcontroller 8 and the computer 12, data recorded in the dust concentration test can be automatically recorded and provided to the tester, and the data recorded in the test can be analyzed to obtain the dust removal efficiency and provide the tester with the dust removal efficiency, so that a basis is provided for the tester to research the dust suppression agent and the dust removal effect test of the dust suppression agent, and experimental evidence can be provided for the tester to select the dust suppression agent and the dust prevention agent to remove dust.
As shown in fig. 4, a method for testing the dust removal effect of a dust suppressant and a dust suppressant is described in examples 2 to 4:
example 2
The present embodiment includes the following steps:
step one, preparing dust without soaking a dust suppressant solution: the dust generating device 1 is adopted to prepare dust which is not soaked in the dust suppressant solution, and the process is as follows:
crushing a substance to be crushed by using the crusher 4 to obtain first powder, screening the first powder, putting the screened first powder into a thermostat for constant-temperature drying treatment to obtain a first dust sample, weighing two parts of first dust with the same mass from the first dust sample, and putting the two parts of the first dust into two dust boxes 3 respectively; the first dust is dust which is not soaked in the dust suppressant solution, and the two dust boxes 3 containing the first dust are respectively called a first dust box and a second dust box;
step two, preparing dust soaked in the dust suppressant solution: the dust generator 1 is used for preparing dust soaked in the dust suppressant solution, and the process is as follows:
firstly, putting a substance to be crushed into a dust suppressant mixed solution, fishing out the substance to be crushed until the substance to be crushed is soaked by the dust suppressant mixed solution, and crushing the substance to be crushed soaked by the dust suppressant mixed solution by using the crusher 4 to obtain second powder; screening the second powder, and putting the screened second powder into a thermostat for constant-temperature drying treatment to obtain a second dust sample; then weighing two parts of second dust with the same mass from the second dust sample and respectively putting the two parts of second dust into two dust boxes 3; the second dust is the dust soaked in the dust suppressant solution, and the two dust boxes 3 containing the second dust are respectively called a third dust box and a fourth dust box;
in this embodiment, to wait that the broken material is cubic coal sample, according to the test demand, can select other materials that can produce the coal mine dust such as rock or gangue according to concrete demand, simulated the rock dust and the coal dust that produce in the actual coal mine tunnel better, guaranteed the accuracy of test.
In this example, the first powder screened in step one and the second powder screened in step two both have a particle size of less than 200 mesh.
In this example, the mass of the first dust and the mass of the second dust were both 0.5kg.
In this embodiment, the temperature of the constant-temperature drying treatment is 40 ℃, and the time of the constant-temperature drying treatment is 20 hours.
In the actual test process, the temperature of the constant-temperature drying treatment can be adjusted within the range of 40-50 ℃ according to specific requirements; the time of the constant-temperature drying treatment can be adjusted within the range of 20 h-30 h according to specific requirements.
In this embodiment, the length of the simulation tunnel device 27 is 10m.
Measuring the concentration of dust in air in the simulated roadway: a plurality of dust sensor 6 detect the air dust concentration in simulation tunnel device 27 respectively and transmit the air dust concentration of a plurality of test points that detect for microcontroller 8, and microcontroller 8 transmits the air dust concentration of a plurality of test points that it received again to computer 12 through communication module 11, and computer 12 receives and takes notes the air dust concentration of a plurality of test points to the air dust concentration record of a plurality of test points is the air dust concentration rho of each test point 0 ；
And step four, conveying the dust which is not soaked in the dust suppressant solution, and measuring the dust concentration in the simulated roadway: after the first dust box in the first step is installed, the operation computer 12 sends a blower starting signal to the microcontroller 8 through the communication module 11, the microcontroller 8 controls the blower 2 to be started so that first dust in the first dust box enters the simulated roadway device 27, and the microcontroller 8 controls the blower 2 to be closed until the first dust in the first dust box is completely blown; meanwhile, in the process of conveying dust which is not soaked in the dust suppressant solution into the simulation tunnel device 27, the dust sensor 6 performs first real-time detection on the dust concentration in the simulation tunnel device 27, transmits the detected dust concentrations at a plurality of test points to the microcontroller 8, the microcontroller 8 transmits the received dust concentrations at the plurality of test points to the computer 12 through the communication module 11 in real time, and the computer 12 receives and processes the dust concentrationsRecording the dust concentration of a plurality of test points at each sampling moment, arranging the dust concentrations of the plurality of test points at each test point according to the time sequence by using the computer 12, indicating that the dust concentration of the test point is stable when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, and recording the dust concentration of the later sampling moment of the two adjacent sampling moments as the first dust concentration rho of the test point 1 Closing the dust sensor 6, and opening the dust removal device 22 to remove residual dust in the simulation roadway device 27 for 60min;
and step five, starting a dustproof agent spraying device and measuring the dust concentration in the simulated roadway when the dust which is not soaked in the dust suppressant solution is conveyed: after the second dust box in the first step is installed, the operation computer 12 sends a blower starting signal and a dustproof agent spraying device starting signal to the microcontroller 8 through the communication module 11, the microcontroller 8 controls the blower 2 to be started to enable first dust in the second dust box to enter the simulation roadway device 27, the microcontroller 8 controls the dustproof agent spraying device 9 to work, and until the first dust in the second dust box is blown clean, the microcontroller 8 controls the blower 2 and the dustproof agent spraying device 9 to be closed; meanwhile, in the process of removing dust in the simulation roadway device 27 by starting the dust-proof agent spraying device 9 when dust which is not soaked in the dust-proof agent solution is conveyed into the simulation roadway device 27, the dust sensor 6 carries out secondary real-time detection on the dust concentration in the simulation roadway device 27, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller 8, the microcontroller 8 transmits the dust concentrations at a plurality of test points received by the microcontroller 8 to the computer 12 through the communication module 11 in real time, the computer 12 receives and records the dust concentrations at a plurality of test points at each sampling time, the computer 12 is adopted to arrange the dust concentrations at a plurality of sampling times at each test point in time according to the time sequence, when the dust concentration difference between two adjacent sampling times is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling time of the two adjacent sampling times is recorded as the second dust concentration rho at the test point 2 Turning off the dust sensor 6 and turning on the dust-removing device 22 for simulationResidual dust in the roadway device 27 is removed for 60min;
sixthly, conveying the dust soaked in the dust suppressant solution and measuring the dust concentration in the simulated roadway: after the third dust box in the second step is installed, the operation computer 12 sends a blower starting signal to the microcontroller 8 through the communication module 11, the microcontroller 8 controls the blower 2 to be started to enable second dust in the third dust box to enter the simulated roadway device 27, and the microcontroller 8 controls the blower 2 to be closed until the second dust in the third dust box is blown clean; meanwhile, in the process of conveying dust soaked with dust suppressant solution into the simulation roadway device 27, the dust sensor 6 carries out third real-time detection on the dust concentration in the simulation roadway device 27, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller 8, the microcontroller 8 transmits the dust concentrations at the plurality of test points received by the microcontroller in real time to the computer 12 through the communication module 11, the computer 12 receives and records the dust concentrations at the plurality of test points at each sampling moment, the computer 12 is adopted to arrange the dust concentrations at the plurality of test points according to the time sequence, when the dust concentration difference value of two adjacent sampling moments is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling moment in the two adjacent sampling moments is recorded as a third dust concentration rho at the test point 3 Closing the dust sensor 6, and opening the dust removal device 22 to remove residual dust in the simulation roadway device 27 for 60min;
and seventhly, starting a dustproof agent spraying device and measuring the dust concentration in the simulated roadway when the dust soaked in the dust suppressant solution is conveyed: after the fourth dust box in the second step is installed, the operation computer 12 sends a blower starting signal and a dustproof agent spraying device starting signal to the microcontroller 8 through the communication module 11, the microcontroller 8 controls the blower 2 to be started to enable first dust in the second dust box to enter the simulation roadway device 27, the microcontroller 8 controls the dustproof agent spraying device 9 to work, and until the first dust in the second dust box is blown clean, the microcontroller 8 controls the blower 2 and the dustproof agent spraying device 9 to be closed; at the same time, the in-direction simulation tunnel device 27In the process of starting the dust-proof agent spraying device 9 to remove dust in the simulation tunnel device 27 when dust soaked with dust suppressant solution is conveyed, the dust sensor 6 carries out fourth real-time detection on the dust concentration in the simulation tunnel device 27 and transmits the detected dust concentrations at a plurality of test points to the microcontroller 8, the microcontroller 8 transmits the received dust concentrations at the plurality of test points to the computer 12 through the communication module 11 in real time, the computer 12 receives and records the dust concentrations at the plurality of test points at each sampling time, the computer 12 is adopted to arrange the dust concentrations at the plurality of sampling times at each test point according to the time sequence, when the dust concentration difference value of two adjacent sampling times is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the next sampling time in the two adjacent sampling times is recorded as the fourth dust concentration rho at the test point 4 Closing the dust sensor 6, and opening the dust removal device 22 to remove residual dust in the simulation roadway device 27 for 60min;
in this embodiment, the specific process of opening the dust removing device 22 to remove the residual dust in the simulated roadway device 27 in the fourth step to the seventh step is as follows: the operation computer 12 sends a dust removal starting signal to the microcontroller 8 through the communication module 11, the microcontroller 8 controls the fan 23 to work, and residual dust in the simulation roadway device 27 is conveyed to the water tank 25 through the air duct 26 for adsorption;
the specific process of starting the dustproof agent spraying device 9 to remove dust in the simulation roadway device 27 in the fifth step and the seventh step is as follows: the operation computer 12 sends a starting signal of the dustproof agent spraying device through the communication module 11, the microcontroller 8 controls the water pump 13 in the dustproof agent spraying device 9 to work, the water pump 13 conveys the dustproof agent solution in the liquid storage tank 17 to the spray head 15 through the infusion tube 16, and the spray head 15 starts to spray dust.
In this embodiment, if the dust removing device 22 has too short time for removing the residual dust in the simulation tunnel device 27, it is difficult to completely clear the residual dust in the simulation tunnel device 27, and it cannot be ensured that the cleaning of the simulation tunnel device 27 after each test brings interference to the next test, which is likely to cause inaccuracy of test data; if the dust removing device 22 removes the residual dust in the simulation tunnel device 27 for too long time, the energy consumption in the testing process is increased, and the testing efficiency is reduced, so that the time for opening the dust removing device 22 to remove the residual dust in the simulation tunnel device 27 in the fourth to seventh steps can be adjusted within the range of 60-120 min according to specific requirements.
Step eight, data processing and dust removal efficiency obtaining: using the computer 12 to determine the air dust concentration ρ in step three 0 And the first dust concentration data rho in the fourth step 1 And the second dust concentration data rho in the fifth step 2 According to the formula
Obtaining the concentration change rate R of each test point 1 And using said computer 12 to vary the rate of change R of the concentration at each test point 1 Calculating the average value to obtain the dust removal efficiency of the dust-proof agent, and synchronously displaying the dust removal efficiency through a display 21;
the computer 12 is adopted to calculate the air dust concentration rho in the third step 0 And the first dust concentration data rho in the fourth step 1 And the third dust concentration data rho in the sixth step 3 According to the formula
Obtaining the concentration change rate R of each test point 2 And using said computer 12 to vary the rate of change R of the concentration at each test point 2 The average value is calculated, the dust removal efficiency of the dust suppressant can be obtained, and the dust suppression efficiency is synchronously displayed through the display 21;
the computer 12 is adopted to calculate the air dust concentration rho in the third step 0 And the first dust concentration data rho in the fourth step 1 And the fourth dust concentration data ρ in step seven 4 According to the formula
Obtaining the concentration change rate R of each test point 3 And using said computer 12 willRate of change of concentration R at each test point 3 And calculating an average value to obtain the dust removal efficiency of the dust suppressant and the dust suppressant, and synchronously displaying the dust suppression efficiency and the dust suppressant through the display 21.
Before actual test, it is required to perform an air tightness test on the simulation tunnel device 27, so as to ensure that the air tightness of the simulation tunnel device 27 is good.
During actual testing, the flow rate and pressure in the infusion line 16 are preset via the human input interface 20.
In this embodiment, the time interval between the detection of the dust concentration and the detection of the air concentration in the analog tunnel device 27 by the dust sensor 6 is 0.5s to 5s.
In the present embodiment, the concentration of the dust suppressant mixture is 0.5% to 5%, and the concentration of the dust suppressant mixture is 15% to 25%, and more preferably, the concentration of the dust suppressant mixture is 0.5%, and the concentration of the dust suppressant mixture is 15%. According to the test requirements, the concentrations of the dust suppressant mixed liquor and the dust suppressant mixed liquor with other concentrations can be selected according to specific requirements for testing, so that the dust removal effect under different concentrations of the dust suppressant mixed liquor and under different concentrations of the dust suppressant mixed liquor can be tested.
In this embodiment, the dust suppressant is a composite environment-friendly dust suppressant, which includes sodium carboxymethylcellulose, sodium dodecylbenzenesulfonate, sodium silicate, polyvinyl alcohol, and an aloe extract. The mass fraction of the sodium carboxymethylcellulose is 0.5-0.3%, the mass fraction of the sodium dodecyl benzene sulfonate is 1.5-2%, the mass fraction of the sodium silicate is 1-3%, the mass fraction of the polyvinyl alcohol is 0.5-3%, and the balance is aloe extract.
In this embodiment, the anti-dust agent is a compound anti-dust agent, and the anti-dust agent includes vinyl acetate, polyoxyethylene alkyl propenyl ether, polyvinyl acetate, and water. Wherein the mass fraction of the vinyl acetate is 1-2.5%, the mass fraction of the polyoxyethylene alkyl propenyl ether is 0.05-1%, the mass fraction of the polyvinyl acetate is 0.5-3%, and the balance is water.
In this embodiment, before the microcontroller 8 controls the water pump 13 in the dustproof agent spraying device 9 in the fifth step and the seventh step, the operation computer 12 sends a flow rate adjustment signal and a pressure adjustment signal to the microcontroller 8 through the communication module 11, the microcontroller 8 adjusts the flow rate of the infusion tube 16 through the water pump 13, and the microcontroller 8 adjusts the pressure of the infusion tube 16 through the pressure reducing valve 14.
In this embodiment, the microcontroller 8 adjusts the flow rate of the infusion tube 16 by the water pump 13 so that the flow rate of the infusion tube 16 is 2L/h to 5L/h, and the controller 8 adjusts the pressure of the infusion tube 16 by the pressure reducing valve 14 so that the pressure of the infusion tube 16 is 0.5MPa to 1MPa.
In this embodiment, it is further preferable that the flow rate of the infusion tube 16 is 2L/h, the pressure of the infusion tube 16 is 0.5MPa, and according to the test requirements, the test can be performed under the conditions of other flow rates and pressures according to specific requirements, so as to measure the dust removal effect of the dust suppressant or dust suppressant under the conditions of different flow rates and different pressures.
In the actual test process, other types of dust depressors and dust preventers can be selected according to specific requirements, so that the dust removal effects of different dust depressors, different dust preventers and different dust depressors and dust preventers can be measured.
In this example, the dust removal efficiency of the dust suppressant is 91.2%, the dust removal efficiency of the dust remover is 92.5%, and the dust removal efficiency of the dust suppressant and the dust remover is 97.6%.
Example 3
The present embodiment differs from embodiment 2 in that: the temperature of the constant-temperature drying treatment in the first step and the second step is 50 ℃, and the time of the constant-temperature drying treatment is 30 hours; and in the fourth step, the dust removing device 22 is started to remove residual dust in the simulated roadway device 27 for 120min, the concentration of the dust suppressant mixed liquor is 5%, the concentration of the dust suppressant mixed liquor is 25%, the flow rate of the infusion tube 16 is 5L/h, and the pressure of the infusion tube 16 is 0.5MPa.
In this example, the remaining steps and process parameters were the same as in example 2.
In this example, the dust removal efficiency of the dust suppressant is 92.3%, the dust removal efficiency of the dust remover is 93.7%, and the dust removal efficiency of the dust suppressant and the dust remover is 98.9%.
Example 4
The present embodiment differs from embodiment 2 in that: the temperature of the constant-temperature drying treatment in the first step and the second step is 45 ℃, and the time of the constant-temperature drying treatment is 25 hours; and in the fourth step, the dust removal device 22 is started to remove residual dust in the simulation roadway device 27 for 90min, the concentration of the dust suppressant mixture is 2.75%, the concentration of the dust suppressant mixture is 20%, the flow rate of the infusion tube 16 is 3.5L/h, and the pressure of the infusion tube 16 is 0.8MPa.
In this example, the remaining steps and process parameters were the same as in example 2.
In this example, the dust removal efficiency of the dust suppressant is 91.9%, the dust removal efficiency of the dust remover is 93.1%, and the dust removal efficiency of the dust suppressant and the dust remover is 98.1%.
In conclusion, the invention has the advantages of reasonable design, convenient realization, high testing speed, good use effect and simple and convenient operation, does not need manual operation, data recording and processing, has high efficiency, accurate test and safe and reliable testing process, can obtain the dust removal efficiency of the dust suppressant, the dust removal efficiency of the dust keeper and the dust suppressant, can accurately test the dust removal effect of the dust suppressant, the dust suppressant and the dust suppressant in a coal mine tunnel, realizes the evaluation and analysis of the dust removal effect of the dust suppressant and provides objective and accurate basis for selecting proper dust suppressant and dust suppressant.
It should be understood that the present invention is not limited to the particular embodiments described herein, but is capable of various modifications, changes, substitutions and equivalents without departing from the spirit and scope of the present invention.
Claims (9)
1. A dust suppressant and dust suppressant dedusting effect testing method comprises a data acquisition and processing device, a simulation roadway device (27) for simulating an actual coal mine roadway, a dust generating device (1) for conveying dust into the simulation roadway device (27), a dust suppressant spraying device (9) for removing dust from the dust in the simulation roadway device (27) and a dust removing device (22), wherein the data acquisition and processing device comprises a microcontroller (8) and a communication module (11) which is connected with the microcontroller (8) and is in two-way communication with a computer (12), the input end of the microcontroller (8) is connected with a dust sensor (6) for detecting the concentration of the dust in the simulation roadway device (27), and the output end of the microcontroller (8) is connected with a display (21);
dust generating device (1) including treat broken material to cubic coal sample, rock or gangue breaker (4) that carry out the breakage, with breaker (4) are connected and right sieve (5) that sieve and right the powder after breaker (4) breakage are carried out the dust box (3) that the dust of sieve (5) were selected was saved and is connected with the air outlet of air-blower (2), air-blower (2) are controlled by microcontroller (8), air-blower (2) and dust box (3) all are located the entry end of simulation tunnel device (27), the quantity of dust sensor (6) is a plurality of, and is a plurality of dust sensor (6) are laid along the length direction of simulation tunnel device (27), and adjacent two the horizontal interval of dust sensor (6) is 2m ~ 2.5m, dust repellent sprinkler (9) including liquid storage tank (17) that contain the dust repellent solution, be connected with liquid storage tank (17) and carry in the liquid storage tank (17) water pump (13), be connected with pressure reducing valve (13) of dust repellent and set up on simulation tunnel device (16) and dust removal liquid transfer line (16) detection head (16), dust removal unit (16) and transfer line (16) are provided with dust removal unit (16) on simulation tunnel device (16), the spraying heads (15) and the dust sensors (6) are arranged in a staggered mode, the number of the spraying heads (15) is multiple, the spraying heads (15) are arranged along the length direction of the top of a roadway (28), the horizontal distance between every two adjacent spraying heads (15) is 2-2.5 m, the dust sensors (6), the flow meters (18) and the pressure detection units (19) are all connected with the input end of the microcontroller (8), and the pressure reducing valve (14) and the water pump (13) are all connected with the output end of the microcontroller (8); the method is characterized by comprising the following steps:
step one, preparing dust which is not soaked in a dust suppressant solution: the dust generating device (1) is adopted to prepare dust which is not soaked in the dust suppressant solution, and the process is as follows:
crushing a substance to be crushed by using the crusher (4) to obtain first powder, screening the first powder, putting the screened first powder into a thermostat for constant-temperature drying treatment to obtain a first dust sample, weighing two parts of first dust with the same mass from the first dust sample, and putting the two parts of the first dust into two dust boxes (3) respectively; the first dust is dust which is not soaked in a dust suppressant solution, and the two dust boxes (3) containing the first dust are respectively called a first dust box and a second dust box;
step two, preparing dust soaked in the dust suppressant solution: the dust generator (1) is adopted to prepare dust soaked in the dust suppressant solution, and the process is as follows:
firstly, putting a substance to be crushed into a dust suppressant mixed solution, fishing out the substance to be crushed until the substance to be crushed is soaked by the dust suppressant mixed solution, and crushing the substance to be crushed soaked by the dust suppressant mixed solution by using a crusher (4) to obtain second powder; screening the second powder, and putting the screened second powder into a thermostat for constant-temperature drying treatment to obtain a second dust sample; then weighing two parts of second dust with the same mass from the second dust sample and respectively putting the two parts of second dust into two dust boxes (3); the second dust is the dust soaked in the dust suppressant solution, and the two dust boxes (3) containing the second dust are respectively called a third dust box and a fourth dust box;
measuring the concentration of dust in air in the simulated roadway: a plurality of dust sensors (6) detect the air dust concentration in the simulation tunnel device (27) respectively and transmit the air dust concentration of a plurality of test points that detect to microcontroller (8), microcontroller (8) transmits the air dust concentration of a plurality of test points that it received again to computer (12) through communication module (11), computer (12) receive and take notes the air dust concentration of a plurality of test points to the air dust concentration record of a plurality of test points is the air dust concentration rho of each test point 0 ；
And step four, conveying the dust which is not soaked in the dust suppressant solution, and measuring the dust concentration in the simulated roadway: the first dust in the step oneAfter the box is installed, an operating computer (12) sends a blower starting signal to a microcontroller (8) through a communication module (11), the microcontroller (8) controls the blower (2) to be started to enable first dust in the first dust box to enter a simulated roadway device (27), and the microcontroller (8) controls the blower (2) to be closed until the first dust in the first dust box is blown clean; meanwhile, in the process of conveying dust which is not soaked in a dust suppressant solution into the simulation roadway device (27), the dust sensor (6) detects the dust concentration in the simulation roadway device (27) in real time for the first time, the detected dust concentrations at a plurality of test points are transmitted to the microcontroller (8), the microcontroller (8) transmits the received dust concentrations at the plurality of test points to the computer (12) through the communication module (11) in real time, the computer (12) receives and records the dust concentrations at the plurality of test points at each sampling moment, the computer (12) is adopted to arrange the dust concentrations at the plurality of sampling moments at each test point according to a time sequence, when the dust concentration difference between two adjacent sampling moments is less than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the later sampling moment in the two adjacent sampling moments is recorded as the first dust concentration rho at the test point 1 Closing the dust sensor (6), and starting the dust removing device (22) to remove residual dust in the simulated roadway device (27) for 60-120 min;
and step five, starting a dustproof agent spraying device and measuring the dust concentration in the simulated roadway when the dust which is not soaked in the dust suppressant solution is conveyed: after the second dust box in the first step is installed, an operating computer (12) sends a blower starting signal and a dustproof agent spraying device starting signal to a microcontroller (8) through a communication module (11), the microcontroller (8) controls the blower (2) to be started to enable first dust in the second dust box to enter a simulated roadway device (27), the microcontroller (8) controls a dustproof agent spraying device (9) to work, and the microcontroller (8) controls the blower (2) and the dustproof agent spraying device (9) to be closed until the first dust in the second dust box is completely blown; meanwhile, when dust which is not soaked in the dust suppressant solution is conveyed into the simulation roadway device (27), the dust suppressant spraying device (9) is started to remove dust from the dust in the simulation roadway device (27)In the method, the dust sensor (6) carries out secondary real-time detection on the dust concentration in the simulation roadway device (27), the detected dust concentrations of a plurality of test points are transmitted to the microcontroller (8), the microcontroller (8) transmits the received dust concentrations of the test points to the computer (12) through the communication module (11) in real time, the computer (12) receives and records the dust concentrations of the test points at each sampling time, the computer (12) is adopted to arrange the dust concentrations of the test points at the sampling times according to the time sequence, when the dust concentration difference value of two adjacent sampling times is less than or equal to 5%, the dust concentration of the test point is stable, and the dust concentration of the later sampling time in the two adjacent sampling times is recorded as the second dust concentration rho of the test point 2 Closing the dust sensor (6), and opening the dust removal device (22) to remove residual dust in the simulation roadway device (27) for 60-120 min;
conveying the dust soaked in the dust suppressant solution and measuring the dust concentration in the simulated roadway: after the third dust box in the second step is installed, the computer (12) is operated to send a blower starting signal to the microcontroller (8) through the communication module (11), the microcontroller (8) controls the blower (2) to be started to enable second dust in the third dust box to enter the simulated roadway device (27), and the microcontroller (8) controls the blower (2) to be closed until the second dust in the third dust box is blown clean; meanwhile, in the process of conveying dust soaked with dust suppressant solution into the simulation roadway device (27), the dust sensor (6) carries out third real-time detection on the dust concentration in the simulation roadway device (27), the detected dust concentrations of a plurality of test points are transmitted to the microcontroller (8), the microcontroller (8) transmits the received dust concentrations of the test points to the computer (12) through the communication module (11) in real time, the computer (12) receives and records the dust concentrations of the test points at each sampling time, the computer (12) is adopted to arrange the dust concentrations of the sampling times at each test point according to the time sequence, when the dust concentration difference value of two adjacent sampling times is less than or equal to 5%, the dust concentration of the test point is stable, and the dust concentration of the two adjacent sampling times is in the later period, the dust concentration of the two adjacent sampling times is stableRecording the dust concentration at a sampling moment as a third dust concentration rho at the test point 3 Closing the dust sensor (6), and opening the dust removal device (22) to remove residual dust in the simulation roadway device (27) for 60-120 min;
and seventhly, starting a dustproof agent spraying device and measuring the dust concentration in the simulated roadway when the dust soaked in the dust suppressant solution is conveyed: after the fourth dust box in the second step is installed, an operating computer (12) sends a blower starting signal and a dustproof agent spraying device starting signal to a microcontroller (8) through a communication module (11), the microcontroller (8) controls the blower (2) to be started to enable second dust in the fourth dust box to enter a simulated roadway device (27), the microcontroller (8) controls a dustproof agent spraying device (9) to work, and when the second dust in the fourth dust box is blown clean, the microcontroller (8) controls the blower (2) and the dustproof agent spraying device (9) to be closed; meanwhile, in the process of dedusting dust in the simulation roadway device (27) by starting the dust suppressant spraying device (9) when dust soaked with a dust suppressant solution is conveyed into the simulation roadway device (27), the dust sensor (6) carries out fourth real-time detection on the dust concentration in the simulation roadway device (27), the detected dust concentrations of a plurality of test points are transmitted to the microcontroller (8), the microcontroller (8) transmits the received dust concentrations of a plurality of test points to the computer (12) through the communication module (11) in real time, the computer (12) receives and records the dust concentrations of the plurality of test points at each sampling moment, the computer (12) is adopted to arrange the dust concentrations of the plurality of sampling moments at each test point according to the time sequence, when the dust concentration difference between two adjacent sampling moments is smaller than or equal to 5%, the dust concentration at the test point is stable, and the dust concentration at the next sampling moment in the two adjacent sampling moments is recorded as the fourth dust concentration rho of the test point 4 Closing the dust sensor (6), and opening the dust removal device (22) to remove residual dust in the simulation roadway device (27) for 60-120 min;
step eight, data processing and dust removal efficiency obtaining: using the computer (12) to determine the concentration ρ of airborne dust in step three 0 The first dust concentration data in the fourth stepρ 1 And the second dust concentration data rho in the fifth step 2 According to the formula
Obtaining the concentration change rate R of each test point 1 And using the computer (12) to determine the rate of change R of the concentration at each test point 1 Calculating the average value to obtain the dust removal efficiency of the dust-proof agent, and synchronously displaying the dust removal efficiency through a display (21);
using the computer (12) to determine the air dust concentration ρ in step three 0 And the first dust concentration data rho in the fourth step 1 And the third dust concentration data ρ in the sixth step 3 According to the formula
Obtaining the concentration change rate R of each test point 2 And using said computer (12) to vary the rate of change R of the concentration at each test point 2 The average value is calculated, the dust removal efficiency of the dust suppressant can be obtained, and the dust suppression efficiency is synchronously displayed through a display (21);
using the computer (12) to determine the concentration ρ of airborne dust in step three 0 And the first dust concentration data rho in the fourth step 1 And the fourth dust concentration data ρ of step seven 4 According to the formula
Obtaining the concentration change rate R of each test point 3 And using said computer (12) to vary the rate of change R of the concentration at each test point 3 And calculating an average value to obtain the dust removal efficiency of the dust suppressant and the dust suppressant, and synchronously displaying the dust suppression efficiency and the dust suppressant through a display (21).
2. The method for testing the dedusting effect of the dust suppressant and the dust remover according to claim 1, is characterized in that: the dust removal device (22) comprises a fan (23) for removing dust from residual dust in the simulation tunnel device (27), an air duct (26) which is connected with an air outlet of the fan (23) and used for conveying the residual dust in the simulation tunnel device (27), and a water tank (25) which is connected with the air duct (26) and used for adsorbing the dust in the air duct (26), wherein an air volume adjusting plate (24) for adjusting the air volume in the simulation tunnel device (27) is arranged on the front side of an air inlet of the fan (23), and the fan (23) is controlled by a microcontroller (8).
3. The dust suppression agent and dust control agent dedusting effect test method according to claim 1 or 2, characterized in that: the simulation roadway device (27) is formed by splicing a plurality of sections of simulation roadways, the structures and the sizes of the plurality of sections of simulation roadways are the same, and two adjacent sections of simulation roadways are connected in a sealing mode through sealing glue; the simulation roadway is made of similar simulation materials for simulating actual coal mine roadway surrounding rocks, the simulation roadway comprises a roadway top (28), two roadway sides (30) which are connected with the roadway top (28) and located on the left side and the right side respectively, and a roadway bottom (29) which is connected with the bottoms of the two roadway sides (30), and the roadway top (28) and the two roadway sides (30) are integrally formed.
4. The method for testing the dedusting effect of the dust suppressant and the dust remover according to claim 3, is characterized in that: roadway top (28) are provided with preformed hole (10), roadway top (28) are the arch, the quantity of preformed hole (10) is a plurality of.
5. The method for testing the dedusting effect of the dust suppressant and the dust remover according to claim 4, is characterized in that: preformed hole (10) are including the second preformed hole that is used for installing the first preformed hole of dust sensor (6) and is used for installing atomising head (15), every all install two dust sensor (6), every in the first preformed hole all install two atomising head (15), two in the second preformed hole vertical interval between dust sensor (6) is 0.1m, two vertical interval between atomising head (15) is 0.1m.
6. The dust suppression agent and dust control agent dedusting effect test method according to claim 1 or 2, characterized in that: the data acquisition and processing device further comprises a human-computer input interface (20), and the human-computer input interface (20) is connected with the microcontroller (8).
7. The method for testing the dust removal effect of the dust suppressant and the dust suppressant according to claim 1, wherein: the material to be crushed comprises a blocky coal sample, rock or coal gangue;
the granularity of the first powder screened in the first step and the granularity of the second powder screened in the second step are both smaller than 200 meshes, the constant-temperature drying treatment temperature is 40-50 ℃, and the constant-temperature drying treatment time is 20-30 h.
8. The method for testing the dedusting effect of the dust suppressant and the dust remover according to claim 1, is characterized in that: the specific process of starting the dust removal device (22) to remove the residual dust in the simulation roadway device (27) in the fourth step to the seventh step is as follows: the operation computer (12) sends a dust removal and removal starting signal to the microcontroller (8) through the communication module (11), the microcontroller (8) controls the fan (23) to work, and residual dust in the simulation roadway device (27) is conveyed to the water tank (25) through the air duct (26) for adsorption;
the specific process of opening the dustproof agent spraying device (9) to remove dust in the simulation roadway device (27) in the fifth step and the seventh step is as follows: an operation computer (12) sends a starting signal of the dustproof agent spraying device through a communication module (11), a microcontroller (8) controls a water pump (13) in the dustproof agent spraying device (9) to work, the water pump (13) conveys the dustproof agent solution in a liquid storage tank (17) to an atomizing spray head (15) through a liquid conveying pipe (16), and the atomizing spray head (15) starts to spray and remove dust.
9. The method for testing the dedusting effect of the dust suppressant and the dust remover according to claim 8, is characterized in that: before the microcontroller (8) controls the water pump (13) in the dustproof agent spraying device (9) to work in the fifth step and the seventh step, the operation computer (12) sends a flow adjusting signal and a pressure adjusting signal to the microcontroller (8) through the communication module (11), the microcontroller (8) adjusts the flow of the infusion tube (16) through the water pump (13), and the microcontroller controls (8) to adjust the pressure of the infusion tube (16) through the pressure reducing valve (14).
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| CN108014900B (en) * | 2017-12-15 | 2020-07-14 | 新巴尔虎右旗荣达矿业有限责任公司 | Ore crushing, sampling, dust removal integration system |
| CN110836839B (en) * | 2018-08-16 | 2022-02-22 | 成都瑞柯林工程技术有限公司 | Dust monitoring method and system and signal processing device |
| CN109085102B (en) * | 2018-11-05 | 2023-10-20 | 辽宁工程技术大学 | Dust suppressant wind resistance performance test system and method |
| CN109813641B (en) * | 2019-01-21 | 2021-05-28 | 河南理工大学 | Coal dust prevention and control experimental device |
| CN110132795A (en) * | 2019-05-20 | 2019-08-16 | 华核（天津）新技术开发有限公司 | Radioactive decontamination Efficiency test method |
| CN114878746B (en) * | 2022-04-24 | 2024-06-18 | 广东环境保护工程职业学院 | Dust remover performance detection device |
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