LT5652B - Boiler furnace - Google Patents

Abstract

The invention relates to heating of heat carrier by using thermal energy in boilers (heaters), which is produced in that devices by burning granulated solid fuels. Boiler furnace comprises an equipment for feeding fuel and air and for burning fuel, which is upturned truncated cone, geometric axis of which is vertical with open ends, wider end is directed to the top, lateral surface comprises air supply vents to bearing zone and fuel transporter is screw with air supply vent, axis of which is coincident with transporter axis.

Description

The invention relates to heating of a heat carrier using thermal energy in a boiler (furnace) type device, which is obtained by the combustion of shredded solid fuel - shredded or pelletized straw or wood, etc. in such units. Some varieties of Straw-type fuels intended for combustion and thus for thermal energy are characterized by the fact that the ash pellets melt during combustion, the ash melts during melting and becomes "clumpy". The particles gradually increase by blocking the air supply to the combustion zone. dedicated channels. The combustion process is suppressed and the fire is gradually extinguished. Therefore, fires of known designs are not suitable for burning fuel whose ash melts during combustion, thus interfering with a reliable combustion process.

Various fireboxes, furnaces and boilers are known, where the thermal energy is obtained by burning fuel. In simpler construction, the fuel is supplied to the combustion zone in the required portions. In more advanced boilers (fuel furnaces) fuel is supplied to the combustion zone by a continuous flow or portions of such flow. Typically, in such heating installations, the entire process of feeding fuel to its combustion zone and other processes, such as ash removal processes, are automated. These are heat generators whose design is dependent in part on the manner in which the fuel is supplied to the combustion zone: the fuel may be supplied in portions or streams from the side, from above or otherwise, with appropriate selection of combustion unit combustion mechanisms including air removal, heat dissipation, etc. (See Patent No. 4808 of the Republic of Lithuania).

Their drawbacks are lack of efficiency and reliability, and limited functionality.

The nearest technical solution is described in LT4839. It also has the above-mentioned imperfections.

The object of the invention is to increase the reliability and efficiency of use and to extend the functional capabilities.

Proposed boiler furnace fuel and air supply and fuel combustion equipment which has an inverted cut cone shape with its vertical axis with open ends, the larger end facing upwards and the side surface having openings for supplying and distributing air to the combustion zone (interior), and the fuel conveyor is a screw with a hole for supplying air, the axis of which coincides with the axis of the conveyor.

In the provided boiler furnace, the fuel is fed from the bottom up to the combustion zone, whereupon the hot ash is pressed upwards from the bottom of the combustion zone and pressed downwards through the edges of the cut cone. The melted ash, when adhered to each other, has the ability to freely fall down without clogging the ducts for supplying air to the combustion zone. This results in an uninterrupted and reliable combustion process, even when burning fuel whose ash melts during the combustion process.

The proposed boiler furnace is shown in the drawing Fig. 1.

It consists of ashtray, fuel supply conveyor 2, fuel supply conveyor drive 3, loose and melted ash 4, fuel combustion zone 5, combustible fuel 6, fuel hopper 7.

Pakura works like this. In preparation for starting the firebox, the bunker 7 is filled with shredded fuel such as straw pellets. The fuel supply conveyor drive 3 is actuated, the fuel supply conveyor 2 is actuated and the fuel pellets are transported from the hopper 7 to the fuel combustion zone 5. The upper expanding end of the conveyor 4, i.e. when the combustion zone 5 is filled, the fuel layer 6 is ignited and, when ignited, the air stream is released. The power output of the firebox is regulated by changing the output of the conveyor drive 3 and the air flow.

The Kindle differs from its counterparts in greater functionality, performance and efficiency.

Claims (2)

DEFINITION OF INVENTION 1. A boiler furnace comprising fuel and air supply and fuel combustion equipment, characterized in that the combustion equipment has an inverted cut cone shape with its vertical axis open, the major end facing upwards and the side surface having openings for combustion air supply and distribution of the zone (inside). 2. A furnace as claimed in claim 1, characterized in that the fuel conveyor is a screw with a hole for supplying air, the axis of which coincides with the axis of the conveyor.