RU22983U1 - TORCH AND LAYER HEATER - Google Patents

Abstract

1. Flare-layer furnace containing a shaft made of bricks with horizontal grates, air supply channels, an ash pan, a clamping grate, an afterburner, characterized in that the furnace further comprises a fan with a pipe that is connected to the hopper and an expanding capacity, an air duct is located in the furnace, which has the ability to supply air to meet the gas-weighted flow.

Description

F23B 1/38

Flare furnace

The utility model relates to energy, in particular to devices for burning solid fuel.

Known high-speed furnaces with high air velocity for burning wood waste, for example, the system Century Pomerantsev in which the aerodynamic stability of the layer provides a clamping lattice, and unburned fuel particles in the pre-combustion burn out in the combustion chamber.

The main disadvantage of the furnace of V.V. Pomerantsev is the impossibility of burning high-moisture waste (more than 40%) and the impossibility of simultaneously burning large-sized wood waste with a small fraction, such as sawdust, shavings, etc. (VV Mamaev et al. Thermal power plants in the forest industry. Polygraph. 1987., p. 28).

Known flare-layer furnace of the system of S.V. Tatishchev, designed for burning brown and hard coal and milling machine under boilers with a capacity of up to 75 t / h. Wet fuel from the hopper is fed into the mine, where it is heated and dried by hot flue gases, which are sucked from the combustion chamber by an air stream flowing from the nozzle. From the mine, fuel enters the combustion chamber, where fines are burned in suspension in a gas-air stream. To intensify combustion in the furnace through additionally installed

nozzle is supplied with secondary air. Larger fractions precipitate on the grate with burn in the layer. When burning fuel with a moisture content of less than 25%, the furnace is carried out without a drying shaft.

The disadvantages of the flare-layer furnace of S.V. Tatishchev are unstable aerodynamics due to the simultaneous supply of large and small fractions and the short residence time of small fractions in the drying shaft and the impracticability of a certain ratio when feeding small and large fractions of fuel (V.V. Mamaev et al. installations in the forest industry. Polygraph. 1987., p. 25) - prototype.

The technical task of the claimed utility model is to increase the efficiency of the furnace.

The technical problem is achieved in that the flare-layer furnace contains a shaft made of brick with horizontal grates, air channels, an ash pan, a clamping grate, a combustion chamber, while the furnace additionally contains a hanger with a gas suspension pipe, which is connected to the hopper and an expanding tank, moreover, an air duct is located in the furnace, which has the ability to supply air towards the gas-weighted flow.

Comparison of the claimed utility model with the prototype shows that it differs in the following features:

-the furnace further comprises a fan with a pipeline for gas suspension;

- the pipeline is connected to the hopper and expanding capacity;

- an air duct is located in the furnace, which has the ability to supply air to meet the gas-weighted flow.

Therefore, the claimed utility model meets the criteria of “novelty.

The utility model can be performed using standard equipment and well-known technological methods. Therefore, it meets the criterion of “industrial applicability.

The figure schematically shows a flare-layer firebox. The furnace contains a furnace shaft, horizontal grate 2, fan 3, duct 4, boiler 5, hopper 7, screw feeder 8, expanding tank 9, pipeline 10, a window for unloading ash and air supply under the grate 11.

The furnace works as follows. Small fuel is collected in the hopper 7 and, through a screw feeder 8 and a pipe 10, is supplied to an expanding tank 9, where a gas suspension with a high concentration of the solid phase is formed. Drying is mixed in the pipeline 10 and vessel 9 due to a mixture of air and exhaust flue gases after the boiler 5. The gas suspension from the vessel 9 enters the mine 1, where there is active mixing with air, which is supplied through the air duct 12. In the upper part of the mine 1 there is combustion small fractions, and unburnt particles burn out on the grate 2. Under which air is supplied through the hole for cleaning ash 11 and the duct 4. Lump fuel is fed through a special shutter and burns out on horizontal grate 2, where air is supplied through the duct 4 and the hole 11, and the combustion of unburned particles occurs after the clamping grid 13 in the combustion chamber 14.

Claims (1)

1. Flare-layer furnace containing a shaft made of brick with horizontal grates, air channels, an ash pan, a clamping grate, an afterburner, characterized in that the furnace further comprises a fan with a pipe that is connected to the hopper and an expanding capacity, an air duct is located in the furnace, which has the ability to supply air to meet the gas-weighted flow.