SU1393990A1 - Method of layer burning-up of fuel - Google Patents

Abstract

Invention m. used in the chemical industry and in power plants. The purpose of the invention is to increase the operational reliability of / 8 spraying of dewatered heavy fuel (T). T is fed to zone 2 of the furnace layer and the product and combustion layers are bubbled through the device 5, and through the device 6 they wash the periphery of the layer. At the same time, the layer is heated to the boiling point temperature found in T WATER. As a result. the collapse of vapor bubbles into the combustion zone 4 are dripped and vapor of light fractions T. The oxidant is introduced above the pricing zone by two opposing streams through devices 7 and 8. One stream is directed along the boundary of zone 3 of the layer T at an acute angle up to the surface of the foam towards the second stream, an oxidizing agent, which is fed directly into the formed Laquel. 1 il. i (L

Description

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The invention relates to the power industry and can be used in the chemical industry, power plants and other parts of the national economy.

The aim of the invention is to increase the operational reliability of spraying watered heavy fuels.

The drawing shows an installation for implementing the combustion method.

It comprises a furnace body 1 with zones of 2-4, respectively, a layer of foaming and burning fuel, a device 5 and 6 for introducing combustion products and an air supply device 7 and 8.

The method of burning fuel is realized in the following way.

Fuel or liquid waste is fed to zone 2 of a layer of fuel. The products of it are wound through the device 5 by bubbling a layer, and through the device 6 they wash the periphery of the layer. At the same time, the topsoil layer is heated to T 100 ° C, i.e. to the boiling point of water in the fuel, J is foaming and vapor bubbles form in the zone 3 of foaming. As a result of these bubbles collapsing, droplets and a pair of light fuel fractions are carried out in the combustion zone 4.

The oxidizing agent required to ensure the combustion process consists of two streams supplied from device 7. The first stream, 30-40% of the total oxidizer, is directed along the boundary of foam zone 3 at an acute angle of, for example, 30} to the surface forming foams, thereby blowing away the upper part of the generated foam and transporting it to the burning zone 4. The remainder of the oxidant is fed directly to the resulting flame through the devices 8, where the primary fuel, an air mixture, is burned.

Example. Combustion into the device that implements the proposed method receives liquid fuel with a moisture content of 20–30%, a density of 960 kg / m, and a heat of combustion of „6300 kcal / kg. A gaseous coolant (waste flue gases) washes in a layer of fuel with an initial height h of 0.05-0.07 m. The temperature in the layer is maintained at about 100 ° H.

Through the primary nozzles, 30% of the oxidant is supplied at a flow rate of 15-20 m / s. Through the secondary nozzles, the remainder of the oxidizer is introduced at a rate of 40-50 m / s at the outlet.

Under these conditions, stable foam generation is observed (waste layer increases to h 0.09-0.15 m) and highly formed combustion with a specific capacity

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B „„ 1600-2500 kg / m h.

Claims (1)

Invention Formula The method of layer combustion, fuel by bubbling through the fuel layer of the intermediate gaseous coolant, heating the bed with combustion products and introducing the oxidant with two-way counter-flows over the resulting foam zone, which is designed to increase the operational reliability of spraying of water-flooded jel1X fuels, as the intermediate coolant use the products of combustion, the fuel is heated to the boiling point of water in it, and the oxidant flows of the first row are directed below scrap up to the side opposite flows of the second row.