RU1788397C - Aspiration system of breaker cascade - Google Patents

Description

air with windows 15, hopper 16 of the source material, conveyor 17, conveyor 18 of crushed material, air flow sensor 19 in the dust intake pipe, water pressure sensor 20 entering the purification unit 8 for air purification, electrified valve 21 for supplying dust to water and 22 feed lines

water./

The suction system operates as follows.

The source material from the hopper 16 is conveyed by a conveyor 17 into the feed chute of the secondary crusher 1. Intensive dust formation occurs when the material is crushed. When the crusher 3 is started, the exhaust fan 6 is turned on and starts to suck off dusty air through the dust intake pipe 5, the internal free space of the fine crusher 3, its feed chute, the screen 2, the internal free space of the fine crusher 1, its charge chute and conveyor gallery 16. Air flows are shown by arrows (Fig. 1).

The dusty suctioned air from the outlet of the fan 6 through the duct 7 enters the air purification unit 8, for example, a filter for two-stage air purification of moist dust suppression. The purified air from the outlet of the air purification unit 8 enters the drip trap 10, in which moisture is separated, the latter is removed through the drain pipe 11, and the sludge from the air purification unit 8 is removed through the sludge discharge pipe 9. From the outlet of the droplet eliminator 10, the cleaned air through the exhaust duct 12 enters the inlet of the air conditioner 13, then through the recirculation duct 14 through the windows 15 it enters the gallery of the conveyor 17. The process of cleaning and recirculating air is carried out continuously during the operation of the tract. An air supply unit (not shown in the drawing) is mounted to provide an air balance, by which an overpressure is achieved in the crushing case. Excessive pressure in the crushing casing prevents the spread of dust from the places of dust formation through leaks of suction shelters 4.

The control of the aspiration process is carried out as follows.

In the last year, when the cascade of crushers is switched off, the conveyor 17, the exhaust fan 6 and the electrified valve 21 are turned off.

When the crusher cascade is turned on, contact 22 of the start circuits closes

fine crushers 3 and voltage is applied to the coil 23 of the electrified valve 21. The valve 21 will open and water will begin to flow to the air purification unit 8 for dedusting, while the water pressure monitoring sensor 20 will work, close its contact 24-2 in the coil circuit 26 of the intermediate fan start relay 6. Relay 26 will work, close its contact 26- 1 in the chain of the intermediate relay 29 for starting the conveyor 17. When the fan 6 is operating in the dust receiving pipe 5, the air flow is activated, the air flow control sensor 19 will work, close its contact 27-2, the relay 29 in the start circuit of the conveyor 17 will work, and the last one will start work (Fig. 2).

When the fan 6 is exited, the sensor 19 will control the air flow in the nozzle 5, open its contact 27-2, the intermediate relay 29 in the circuit will disconnect; the conveyor 17 starts and the last one stops, the contact 27-1 closes, the signal lamp 28 lights up, indicating an accident in the aspiration system.

In case of disappearance of water pressure in line 22 or failure of electrical; valve 21, the sensor 20 monitors the pressure of the water entering the dust suppression, opens its contact 24-2, the intermediate relay 26 opens, its contact 26-1 opens, the intermediate relay 29 de-energizes and stops the conveyor 17, the contact 24-1 closes, it lights up warning light 25, indicating the disappearance of water pressure.

When the cascade stage stops, the contact 22 of the start chains of the fine crusher 3 is opened, the relays 26 and 29 are automatically de-energized, the fan 6 and the coil 23 of the electrified valve 21 are turned off and the water supply to the dust suppression is stopped.

The implementation of the inventive system will reduce energy consumption due to recirculation of purified air, reduce heat loss in the cold season and eliminate environmental pollution by eliminating the discharge of dusty air into the atmosphere.

Claims (1)

The claims An aspiration system for the cascade of crushers containing an air duct, suction shelters, a two-stage air purification unit, a fan and an exhaust air duct, characterized in that, in order to save energy resources by using the cascade of technological equipment as a dust pipe, air purification and its recirculation, aspiration Some shelters are sealed with air between the tract and the treatment unit, and the exhaust of a single air duct, the air duct is equipped with a recirculation unit connected to a fan placed by the air duct. Fig. / & J FiЈЈ