LT5899B - Heat generator - Google Patents

Abstract

Heat generator for heating the heat carrier, by using heating energy in boiler (furnaces) type devices, it results when solid fuel is burning: cut or in pellet pressed straw or wood and others. Heat generator, consists of fuel and air supply systems and fuel burning equipment. Combustion equipment is a vertical hollow cylindrical shape with built-in fuel transporter and fuel guides. In the inner surface of cylinder along its generatrix it is set guiding lines for cut fuel. Upper ends of guiding lines for cut fuel are below the upper end of a hollow cylinder.

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 types of straw-type fuels for combustion and thus for thermal energy are characterized by the melting of the ash pellets during the combustion process and the ash melting during the melting process. Clumps of ash gradually increase, clogging the ducts for air supply to the combustion area. The combustion process is suppressed and the fire is gradually extinguished. Therefore, heat generators of known designs are not suitable for burning fuel whose ash melts during combustion, thus interfering with a reliable combustion process.

Various heat generators are known, such as furnaces and boilers, in which thermal energy is generated by burning fuel. In the case of generators of a simpler design, fuel is supplied to the combustion zone in the required portions. In more advanced generators, fuel is supplied to the combustion zone by a continuous stream or portions of such a stream. 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. Such devices are described in Lithuanian patents LT4839B, LT4808B and other sources. Known generator designs are characterized in part by 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 generator mechanisms including air supply, ash removal, heat removal, etc.

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.

The advantage of the heat generators constructed according to the present invention is that the fuel is supplied from the bottom upwards, so that the heated ash is pressed upwards from the bottom of the combustion zone and adheres to the edges of the combustion zone. The melted ash, when adhered to one another, has the ability to freely fall down without obstructing the ducts for the supply of air to the combustion zone. This results in a continuous and reliable combustion process, even when fuel is burned.

In a heat generator consisting of fuel and air supply systems and fuel combustion equipment, the new is that the fuel combustion equipment is in the form of a hollow vertical cylinder with a built-in fuel conveyor and fuel guides, and a crushed fuel guiding strip is mounted along its interior surface; the upper ends of the guides for the shredded fuel are below the upper end of the hollow cylinder.

The proposed heat generator is shown in the drawing of FIG.

It consists of a housing 1, a fuel conveyor 2, a fuel guide bar 3, an ash removal gutter 4, supports 5, actuator 6, air supply system 7, a fuel hopper 8. The generator operates as follows.

In preparation for starting the generator, the fuel tank 8 is filled with shredded fuel such as straw pellets. The fuel supply conveyor drive 6 is actuated, the fuel supply conveyor 2 starts and the fuel pellets are transported from the hopper 8 to the fuel combustion zone. For the upper end of the transporter 2, i.e. when the combustion zone is full, the fuel layer is ignited and, when ignited, the air stream is released. The power output of the generator is controlled by changing the output of the conveyor drive 6 and the air flow. The generator differs from its counterparts in terms of higher functionality, higher throughput and efficiency.

Claims (3)

1. A heat generator consisting of fuel and air supply systems and fuel combustion equipment, characterized in that the combustion equipment is in the form of a hollow vertical cylinder with a built-in fuel conveyor and fuel guides. 2. A heat generator according to claim 1, characterized in that a guide rail for the shredded fuel is mounted on the inner surface of the cylinder along its constituent parts. 3. A heat generator according to claim 2, characterized in that the upper ends of the guides for the shredded fuel are below the upper end of the hollow cylinder.