High pressure dry fog spray dust suppression vehicle spray dust suppression equipment

High pressure dry fog spray dust suppression vehicle

Coal dust is one of the most harmful natural disasters in coal mines. Workers who inhale coal dust for a long time can suffer from respiratory inflammation in mild cases and pneumoconiosis in severe cases. The number of deaths caused by pneumoconiosis in China's coal mines each year far exceeds the number of deaths directly caused by underground production accidents, and the vast majority of mines have a strong risk of coal dust explosions, which also occur from time to time.

High pressure dry fog spray dust suppression vehicle

The comprehensive dust prevention measures for the "three soft" coal seams are particularly prominent, manifested in the following aspects: when using coal body water injection dust prevention measures, the water injection drilling holes are prone to collapse and get stuck, making it difficult to remove dust, making it difficult to achieve the ideal drilling depth, and difficult to seal the holes. The reasonable water injection pressure and time are still difficult to determine; The dust in the coal cutting process seriously exceeds the standard. In the absence of spray, the zui high energy reaches more than 1000mg/m3; A large amount of dust is generated at various transfer points on the transport runway, seriously polluting the intake airflow of the working face; During the coal mining operation on the fully mechanized top coal caving face, the dust at the coal discharge port exceeded the standard severely; After a long time of blasting in the excavation face, it is still difficult to reduce the floating dust to the standard concentration. On the one hand, there is no suitable additive in the existing water spray dust suppression to improve the dust suppression effect, and on the other hand, the spray head has the characteristics of poor atomization effect.

Automatic spray dust suppression device for dust measurement. The device can control the dust concentration by spraying water to reduce dust, and is suitable for working places such as coal mine underground working face, coal bunker transportation roadway at the bottom of the shaft. The system mainly consists of coal mine dust sensors, explosion-proof and power supplies, solenoid valves, nozzles, water pipes, etc. When the dust concentration in the monitoring site reaches or exceeds the alarm value set by the dust sensor, the dust sensor generates a trigger control signal, which is transmitted to the explosion-proof and Ben Ando power supply through the transmission cable. The relay in the explosion-proof and Ben Ando power supply opens the solenoid valve to spray water on the workplace, reducing the dust in the workplace. When the dust sensor returns to normal working condition, the spraying stops.

Dust monitoring spray dust control system
The spray system can realize real-time monitoring and reduction of dust concentration in coal mine dust producing workplaces. The system uses the dust concentration sensor to measure the dust concentration, and the dust spray controller automatically controls the start and stop of the spray dust suppression system. The video monitoring uses the monitoring camera installed in the original coal yard to realize the 24-hour continuous monitoring, monitoring and watering of the dust in the measured place, and can transmit data through the network and the municipal monitoring platform.

Because the particles produced by spray are extremely small, the surface tension is basically zero, and the particles sprayed into the air can quickly absorb various dust particles in the air to form effective dust control. It has a good effect on dust control and reduction in large open areas. At the same time, this effect * is an atomization effect that never produces water droplets or moisture. Especially suitable for casting factories, textile factories, food factories, printing factories, airports, amusement parks, pedestrian streets and other widely used applications, with low cost and obvious effects.

Wet chemical dust suppressants consist of one or more surfactants and are compounds composed of hydrophilic and hydrophobic groups. When a wetting agent is dissolved in water, its molecules are surrounded by water molecules. One end of the hydrophilic group is attracted by the water molecules, while the other end of the hydrophobic group is repelled and extends into the air. In this way, the molecules of the wetting agent form a tightly oriented layer (interfacial adsorption layer) on the surface of the aqueous solution, causing a change in the contact state between the surface molecules of water and air. The contact area is greatly reduced, resulting in a decrease in the surface tension of water. At the same time, there is adsorption between the hydrophobic groups facing the air and the dust, which brings the dust particles into the water and fully wets the dust.