18 results about "Respirable dust" patented technology

The invention relates to a fully mechanized coal mining face respirable dust concentration management limit value determination method, belongs to the technical field of coal mine dust treatment, and is used for solving the problem of inaccurate respirable dust control caused by the fact that a traditional fixed threshold value cannot adapt to a multi-dust-source coupling working condition. The method comprises the following steps: acquiring dust falling efficiency data of multiple dustproof measures, establishing a mathematical model of dustproof parameters and dust concentration, calculating a dynamic management limit value by combining an industrial standard threshold value, and performing self-adaptive adjustment by monitoring and triggering parameters such as spraying pressure and dust removal air volume in real time. Compared with a traditional method, the dynamic limit value enables the respirable dust concentration to be reduced by 40% or above, the multi-measure cooperative dust falling efficiency is improved to 85%, water is saved by 15%-20%, the equipment energy consumption is reduced by 10%, and intelligent and precise dust treatment is achieved.

The invention relates to a respiratory dust concentration online monitoring device and method for a coal mine, and belongs to the technical field of respiratory dust concentration monitoring. The device comprises a virtual impact separation module, a light scattering detection module, a flow control module and a data processing module. The virtual impact separation module is used for separating respirable dust and non-respirable dust; the respirable dust enters the light scattering detection module, the respirable dust is irradiated by a laser beam which is incident in the direction perpendicular to the flowing direction of the respirable dust, a scattered light signal obtained after dust scattering is transmitted to the data processing module, and the concentration of the respirable dust is calculated in real time; the flow control module is used for controlling the rotating speed of the sucking pump in real time. Through multi-technology fusion and intelligent algorithm compensation, the accuracy and environmental adaptability of respiratory dust concentration measurement are improved, the problems that a traditional separation device is prone to blockage and needs frequent maintenance are solved, and long-term continuous separation monitoring of respiratory dust can be achieved.

The application discloses a kind of respiratory dust separation devices based on electrocoagulation, including horizontal pipeline and detection pipeline, detection pipeline is installed in horizontal pipeline right end pipe orifice position, electrocoagulation flow guide separation structure is installed in horizontal pipeline, detection pipeline is installed with detection separation circulation structure, the dust leakage opening of the lower wall surface of the connection of horizontal pipeline and detection pipeline is opened, bag filter structure is installed below dust leakage opening;The application relates to the field of respiratory dust separation technology, solves the accumulation of the existing respiratory dust separation equipment with the increase of working time, needs to be cleaned frequently, the persistence is poor, needs to be maintained by staff to its separation structure, the efficiency is lower, and operation is more complicated.

This invention discloses an online detection device for respirable dust concentration, comprising a main cavity and a detection component, wherein the detection component includes a beam emitter and a photoelectric sensor, and a separation zone and a detection zone are formed within the main cavity; the online detection device also includes a gas-guiding and dust-collecting component, which includes a gas-guiding cavity, a separation cavity, and a dust-collecting cavity. This invention, on the one hand, enables the separation of large particulate dust from respirable dust and reduces the probability of the separated large particulate dust escaping with the airflow, ensuring that the gas entering the detection chamber contains only respirable dust, avoiding interference from large particulate dust, thereby enabling direct detection of gas respirable dust concentration and effectively improving the accuracy of the detection results; on the other hand, the integrated design of separation and detection enables continuous online separation and detection of gas, greatly simplifying the detection operation and effectively improving detection efficiency.

The utility model is applicable to the technical field of respirable dust monitoring devices, and provides an electrostatic principle respirable dust on-line monitoring device which comprises a monitoring device body, a detection assembly is arranged at the top of the monitoring device body, and a containing box is fixedly connected to the top of the monitoring device body. A second electric telescopic rod is vertically and fixedly connected to an inner cavity of the containing box, and the top end of the second electric telescopic rod movably extends out of the containing box and is fixedly connected with a hollow cylinder. According to the electrostatic principle respirable dust online monitoring device, after a second electric telescopic rod extends, a hollow cylinder can be driven to ascend, the hollow cylinder covers a probe of a detection assembly, brushes make contact with the surface of the probe, and after a rotating rod is driven by a motor to rotate, the multiple brushes brush and clean the surface of the probe of a hanging plate; dust on the surface of the probe surface is prevented from affecting the air quality monitoring result.

The invention relates to a respirable dust concentration measuring method based on particle counting, and belongs to the field of environment monitoring. Existing respirable dust measuring methods are either long in offline analysis period and incapable of real-time monitoring, or depend on a mechanical hierarchical structure, so that equipment is complex, maintenance is frequent, and power consumption is high. Multi-channel particle size distribution data are obtained through an optical particle counter, optical equivalent particle sizes are converted into aerodynamic particle sizes through an iterative algorithm based on Canningham slip correction, and then the number correction coefficient of each channel is calculated according to a BMRC curve fitting formula formulated by the British Medical Research Committee. And converting to obtain the mass concentration of the respirable dust. The method does not need any mechanical classifier, the whole process is realized through optical measurement and algorithm, the equipment structure is obviously simplified, the maintenance difficulty and power consumption are reduced, the time resolution and the measurement stability are improved, and the method is particularly suitable for real-time continuous monitoring of narrow spaces such as mine underground and tunnels.

The present application relates to dust control technical field, specifically for coal mine dust removal equipment automation control system based on sensor, system includes: source working condition sensing module, dust source intensity feedforward solution module, transport time lag compensation module and collaborative spray execution module, in the present application, through direct collection motor current data of cutting mechanism and establish its nonlinear mapping relationship with dust generation, before dust actually diffuses to sensor, the advance prediction of dust production intensity is completed, the detection lag and response delay defects existing in traditional feedback control are effectively overcome, by introducing wind speed as dynamic variable to participate in the calculation of the accurate transmission time of dust group from cutting point to spray point, the precise space-time matching of dust falling medium putting time and dust group arrival time is realized, while significantly improving the efficiency of respirable dust capture, the water resource waste and floor water accumulation hidden danger produced by invalid spraying are greatly reduced.

The present application relates to dust falling device technical field, specifically is a kind of spray dust falling device for coal mine respirable dust, the present application includes base, the top surface of base is fixedly installed with water tank and power box, the top of base is provided with dust collecting pipe;One end of dust collecting pipe is fixedly connected with flow guide cylinder in through type, the bottom end of flow guide cylinder is connected with water tank;The periphery of dust collecting pipe is fixedly connected with two symmetrical distribution bypass pipes in through type;Atomization mechanism is arranged in bypass pipe;Resonance mechanism is arranged in the middle position of dust collecting pipe, dust enrichment assembly is arranged in dust collecting pipe;In the present application, through the cooperation of dust enrichment assembly, resonance mechanism and atomization mechanism, the " enrichment-resonance-atomization " three-stage processing procedure is integrated, the problem of dispersing respirable dust and air film obstruction is solved, and the capture rate of dust particles is significantly improved. Through the connection of flow guide cylinder and water tank, water recycling is realized, and the problem of water resource waste caused by water mist dispersion is solved.

The invention provides a coal mine dust treatment device, and relates to the field of coal mine dust treatment and environmental protection equipment. Comprising three core parts, namely an intelligent mobile air suction platform, a first-stage inertial collision dust removal module and a second-stage modular wet-type adsorption filtering module, and the intelligent mobile air suction platform carries a dust concentration sensor and a telescopic adjusting rod and can autonomously move and accurately position a dust pollution area; the first-stage inertial collision dust removal module is used for carrying out inertial collision and adsorption treatment on large-particle respirable dust of 3-7 microns and is provided with a pulse injection dust removal system, and the second-stage modular wet adsorption filtering module is used for carrying out centrifugal and wet adsorption deep dust removal on fine particles smaller than or equal to 3 microns and is provided with an ultrasonic wave and brush composite dust removal system. Efficient removal of respirable dust is achieved through the two-stage dust removal structure, autonomous operation and self-cleaning of the device are achieved through cooperation of various sensors and an intelligent control system, and the device is suitable for various dust pollution operation scenes such as coal mining and transportation and has the advantages of being high in dust removal efficiency, high in adaptability, high in intelligent degree and high in practicability. The coal mine dust treatment problem is effectively solved.

The invention discloses an iron ore caving stoping method, relates to the technical field of underground iron ore mining, and aims to solve the problem of dust pollution in caving mining. According to the method, dust control equipment is prepared through a preparation mining project, a monitoring system is linked, rock mass is pre-wetted before blasting, and a low-dust explosive is adopted to inhibit a dust source; during blasting, the operation space is closed, micro-negative pressure is formed, dust is condensed through superfine water mist after blasting, and negative pressure adsorption and purification are conducted; and the dust concentration is dynamically regulated and controlled in the shoveling and ore drawing stages, and the collected dust is subjected to resource recycling along with ore. According to the method, dust control over the whole recovery process is achieved, the dust concentration is stably smaller than or equal to 10 mg / m, the respirable dust removal rate is larger than or equal to 95%, operation is easy and convenient, the mining efficiency is not reduced, safety and economical efficiency are both considered, and the method is suitable for various caving recovery iron ore beds.

The invention relates to a method for synchronously and rapidly detecting multiple parameters of respirable dust and silicon dioxide on a membrane, and belongs to the field of dust monitoring. The method comprises the following steps: S1, carrying out on-membrane sampling and Fourier infrared spectrum scanning on the quartz respirable dust, taking the quartz respirable dust as a spectrum library of a standard sample, and establishing a standard silicon dioxide and quartz respirable dust quality prediction model based on a spectrum absorption peak of silicon dioxide at 800cm <-1 >; s2, selecting different types of dust, carrying out on-film sampling and spectrum comparative analysis, and establishing spectrum databases and dynamic correction models of different types of dust; and S3, aiming at concentration calculation deviation caused by sampling flow fluctuation, establishing a flow compensation and concentration calculation model, and finally realizing synchronous detection of multiple parameters such as respirable dust mass concentration, silicon dioxide mass concentration and silicon dioxide mass percent.

This invention belongs to the field of coal mining technology. It relates to a continuous inertial impact separation system for respirable dust in coal mines, comprising a dust separation unit, a liquid supply unit, a liquid discharge unit, a control unit, and a sampling unit. The liquid supply unit, liquid discharge unit, and sampling unit are all connected to and controlled by the control unit. The dust separation unit is equipped with a dust collection port, a liquid supply port, a liquid discharge port, and a sampling port. The sampling unit is connected to the sampling port. Respirable dust enters the dust separation unit through the dust collection port for inertial separation and then enters the sampling unit for sampling and detection. The liquid supply unit is connected to the liquid supply port, and the liquid discharge unit is connected to the liquid discharge port. The dust accumulated in the dust separation unit is washed by the liquid provided by the liquid supply unit and discharged through the liquid discharge unit to release the dust collection capacity. The separation system of this invention does not require the application of an adhesive substance, enabling continuous separation of respirable dust while improving separation accuracy.

The invention belongs to the technical field of dust treatment, and particularly relates to a foam dust settling agent and a preparation method and application thereof. The preparation method of the foam dust-reducing agent, which is simple and convenient to operate, is adopted, the surfactant and the auxiliary agent are added into the warm solvent according to the proportion and are stirred, so that the operation process is simplified, the requirements on skill and experience of operators are reduced, and the preparation efficiency is high; according to the invention, a plurality of solvents are selected and comprise tap water, deionized water and under-mine circulating water, and the under-mine circulating water is directly used as the solvent, so that the water quality does not need to be treated, and the production complexity and cost are reduced; meanwhile, the defoaming agent is introduced, so that the problem of excessive foaming possibly occurring in the preparation and use processes of the foam dust-settling agent is solved. The foam dust settling agent prepared by the invention has higher dust settling efficiency on dust, especially small-particle respirable dust, and is simple in preparation process, low in raw material cost, good in biodegradability and suitable for industrial application.

The invention discloses a fan blade baffle type efficient foam maker suitable for hydrophobic coal dust, and belongs to the technical field of coal mine underground dust control equipment, the fan blade baffle type efficient foam maker comprises a storage tank, a ball valve, an air nozzle, a foaming mechanism, a mounting cylinder, a conical cylinder and a nozzle adjusting mechanism, the foaming mechanism comprises a first motor, stirring blades, a foam pump, a liquid discharge pipe, an impeller, a foaming net, a second motor and a fan, the nozzle adjusting mechanism comprises a ring disc, a driving ring, a blocking piece, a traction column and a pull ring. Online uniform mixing of foaming liquid and multi-stage homogenization and pressurization of foam are achieved through the foaming mechanism, the generated compact foam can tightly wrap hydrophobic coal dust, the fine coal dust and expired dust treatment efficiency is improved, and reentrainment of dust is restrained; the through-flow area and the spraying cone angle of the nozzle can be adjusted, different dust source scenes can be flexibly adapted, the water consumption is lower compared with traditional spraying dust reduction, and the requirement for underground operation of a coal mine is met.

The utility model provides a kind of mine mist film dust collector of ultrasonic strengthening microfine coal particle removal, including cylinder, water mist nozzle, impeller, waterproof motor, double liquid film dust removal unit, ultrasonic vibration dust removal unit, ultrasonic atomization dust removal unit and sewage recycling unit;Cylinder one end is equipped with air inlet, the other end is equipped with air outlet, and filter screen is equipped at air outlet;Water mist nozzle is located at the center of air inlet;Waterproof motor is located inside cylinder and is fixed with cylinder by hollow motor base;Impeller is located inside hollow motor base, and impeller is coaxially fixed with motor shaft of waterproof motor;Water mist nozzle is opposite with impeller;Double liquid film dust removal unit and ultrasonic vibration dust removal unit are located inside cylinder, double liquid film dust removal unit is adjacent with air inlet, and ultrasonic vibration dust removal unit is adjacent with air outlet;Ultrasonic atomization dust removal unit and sewage recycling unit are located outside cylinder.The dust collector of the utility model greatly improves microfine dust capture ability and respirable dust capture efficiency, realizes water resource recycling.

This invention discloses a dust removal device for mining applications in the field of mining environmental engineering technology. The device includes a pipe, a fence, an atomizer, and a fan. The fence is installed inside the pipe, the atomizer is located between the pipe inlet and the fence, and the fan is connected to the pipe inlet. The fan uses turbulent blades. The atomizer creates a high-concentration, uniform water mist field, causing fine dust particles and water droplets to combine under Brownian motion and inertial collisions to form moist condensation nuclei. The fan then creates a turbulent flow field inside the pipe, causing free dry dust particles and tiny droplets to collide with the formed condensation nuclei at high frequency, resulting in mutual adhesion and agglomeration. A fence is installed downstream of the atomizer to intercept the agglomerated sludge. Clean airflow passes through the fence openings and is discharged through the outlet, achieving precise capture and efficient interception of respirable dust.

This invention relates to a rapid, pretreatment-free detection method for breathable free silica on membranes based on FTIR transmission spectroscopy, belonging to the field of dust monitoring. This method establishes the RCS quality within a 5.78 mm spot diameter and the relationship between the RCS and the 800 cm⁻¹ area. ‑ ¹Standard algorithm for characteristic absorption peaks; targeting kaolinite, the most abundant interfering mineral in coal mine dust, utilizing its 915 cm⁻¹ peak... ‑ ¹The absorption peak was established at 800 cm⁻¹ ‑ ¹ An algorithm for subtracting interference. To address the non-uniform distribution of respirable dust deposited on the filter membrane surface, a piecewise function non-uniform distribution model was constructed. Based on this, a rapid algorithm was proposed that can calculate the total RCS mass of the entire filter membrane using only 10 key measurement points. The entire detection process of this invention eliminates the need for pretreatment steps such as strong acid digestion and high-temperature ashing, shortening the single detection cycle to less than 10 minutes, providing a practical and feasible technical approach for rapid on-site RCS detection in the workplace.

The invention discloses a gas-water-electricity-sound four-dimensional collaborative dust fall system and method for a coal mine working face, and the system comprises a dust monitoring module which is used for monitoring dust concentration data of a fully mechanized excavation face in real time; the gas-water atomization module is used for spraying atomized liquid drops to an area, needing dust fall, of the fully mechanized excavation face for dust fall; the electrostatic charge module is used for applying negative high-voltage static electricity to the flowing liquid, and finally the atomized liquid drops are negatively charged; the sound wave coagulation module is used for emitting sound waves to a region needing dust fall, so that dust particles are coagulated and coalesced; and the control processing module is used for receiving the dust concentration data fed back by the dust monitoring module, performing cooperative control on the working states of the gas-water atomization module, the electrostatic charge module and the acoustic coagulation module after analysis, and realizing gas-water-electricity-sound four-dimensional cooperative dust fall. By means of the mode, dust falling treatment can be effectively conducted on the working face, the concentration of respirable dust of the working face is reduced, and therefore the body health and working safety of workers are guaranteed.