SU89894A1 - The method of operation of the individual dust preparation system for furnaces of steam boilers and industrial furnaces - Google Patents

Description

The inventive MeioN of the invention is a method for operating an individual dust-prepared system for boilers and industrial furnaces.

The described method differs from the existing topics in that it allows to create a supply of dry fuel in the intermediate bunker and in that way accelerates the kindling of the boiler without fuel oil generation, and also makes it possible to add dry fuel along the fuel supply path in order to give flowability to the raw fuel. To adapt the flowability of the raw fuel, the air flow after the mill installation is divided into two streams, one of which, the main one, is sent directly to the main fuel burners, and the other, smaller, through a cyclone into a hole hopper, followed by this dust purpose.

The drawing shows a diagram of the dust preparation system.

The individual dust preparation system consists of mill installation /, main fuel burners 2 firebox 3, additional burners 4, cyclops 5, intermediate hopper 6, dust picker 1 7, screw 8 and fan 9 with connecting dust pipes and air ducts.

The mill installation / includes a raw fuel bunker with a feeder, the mill itself (the separator and the mill fan are not shown in the drawing).

Part of the mixture from the mill installation / enters directly into the main burner 2 of the furnace X and the other part is sucked into the cyclop 5 by the fan 9.

The dust trapped by cyclonets 5 accumulates in the intermediate bunker 6, under which the dust collectors 7 are located according to the number of additional burners 4. The latter serve to accelerate the boiler spout without the use of fuel oil, for backlighting; firebox at small load.

In addition, the prepared fuel in the intermediate bunker 6 serves to add dry toning along the fuel supply line for the hydrofluoroprop;

The recirculation in the dust duct 10 is carried out in cases where the amount of agent required for minimum ventilation of the mill is greater than the throughput of the cyclone 5.

Under normal operating conditions, there is a mill installation in operation / only with main burners 2.. As needed, additional mounts 4, powered by dust from the bunker 6, are switched on by switching on the power supply 7 and the fan 9.

When ma, 1st or oscillating loads of the firebox, as well as when forcing it, donal-burners 4 work continuously, parallel to the main burners 2.

Subject invention

The method of operation of the individual dust preparation system for the furnaces of steam boilers and industrial furnaces is necessary in order to provide the plant with dry fuel necessary for heating and lighting the boiler, as well as adding it along the fuel feed path, to prevent fuel sticking there.

Cyclone 5, dust suppressors 7 and fan 9 operate continuously.

When the furnace is melted and at 1 {the presence of a neighboring unit, the pass n. 1, which is in operation, is ready from the latter, is fed by the screw 8 to the bunker 6 and further transported by hot air to the additional burner 4 by switching on the fan 9.

Hot air in this mode is also supplied from a neighboring unit through the manifold 11.

When using dust to increase the flowability of raw fuel, it is poured into the work of the Cyclops 5, the dust from which is delivered to the screw 8 and then enters the raw coal bunker of this installation or its neighbors.

the air stream after the mill installation is divided into two streams, of which the first main stream is directed directly to the main burners of the furnace, and the second, smaller one, through a cyclone into the dust bunker, followed by using this dust for kindling, lighting the boiler, and bedding on the path of the fuel supply.