SU1672115A1 - Fuel burning device - Google Patents

Abstract

Invention m. B. used in boiler technology. The purpose of the invention is to intensify the combustion processes and increase harmful emissions. For this purpose, combustion products are removed from the furnace from top to bottom through the failure of the gas distribution grid 1 in the intervals between the air supply periods. The proposed method allows to increase the boiler efficiency up to 91%, to reduce the dust content of the exhaust gases in the gas duct 5 to 0.26 g / m ³ . 1 il.

Description

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(21) 4725421/06

(22) 08/04/89

(46) 08.23.91. №31

(71) Lugansk center of new technologies Technocentre

(72) E.I. Rassamakin, A.G.Katz and G.P.Korolenko

(53) 662.939 (088.8)

(56) USSR Author's Certificate N: 861849.kl. F 23 C 11/02, 1979.

(54) METHOD FOR BURNING FUEL

(57) Invention m. used in boiler technology. The purpose of the invention is to intensify the combustion processes and increase harmful emissions. For this purpose, combustion products are removed from the furnace from top to bottom through the failure of the gas distribution grid 1 in the intervals between the air supply periods. The proposed method allows to increase the boiler efficiency up to 91%, to reduce the dust content of the exhaust gases in the gas flue 5 to 0.26 g / m. 1 il.

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The invention relates to boiler technology and can be used when burning fuel in a fluidized bed.

The purpose of the invention is to intensify the combustion processes and reduce harmful emissions.

The drawing shows a furnace for implementing the proposed method.

The furnace contains a failed gas distribution grid 1, a fuel supply pipe 2, a heat exchanger 3, an ash collection 4, a gas duct 5, an ash bunker 6.

The method is carried out as follows.

Inert gas grating 1 is fed with inert material with limestone additive and at the same time, turbine air is pulsed through the gas distribution grid 1 from bottom to top. Solid carbonaceous fuel is supplied through pipe 2 with a hermetic feeder (not shown).

In the process of impulse supply of turbine air, there is a sharp movement of air and particles captured by it upward of the firebox, as a result of which intense fuel combustion occurs. This increases the pressure in the furnace. After the air pulse supply ceases, solid fuel particles settle over grid 1, and the resulting gases, as a result of the combustion of part of the fuel from the upper part of the furnace, undergo a downward pressure through the layer of inert material with fuel, the failed gas distribution grid and the liquefied cooling zone in the collector

4 ashes, then into the flue 5. The liquefied ashes are removed to the hopper 6. Then the cycle is repeated.

Note In the furnace with a volume of 7 m3 with an area of a gas distribution grid 1 with an area of 1 m2, the fuel is supplied with a fraction of 1-13 mm in an amount of 150 kg / h. Air is supplied from the bottom up im-. pulse duration of 0.1 s in the amount of 750 m / h. In the interval between pulses with a duration of 3 seconds, under the action of an overpressure of 1000 mm, the exhaust gases are removed from the top down through a layer of fluidizing agent with fuel over the gas distribution grid 1, liquefied cooled ash and then into the gas duct 5.

Intensification of combustion allows to increase the boiler efficiency up to 91%. The dust content of the flue gas in the flue gas is 0.26 r / MJ.

The proposed method allows increasing the intensity of the combustion process, reducing emissions of harmful substances with waste gases into the environment and increasing the efficiency of the boiler.

Claims (1)

Claims Combustion Method: by introducing the latter into the fluidized bed of semi-particulate inert material, periodically supplying air from bottom to top, and removing the combustion products, characterized in that, in order to intensify the combustion processes and reduce harmful emissions, the combustion products t from top to bottom between the periods of air supply.