RU2384792C1 - Regenerative burner device - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention refers to heat engineering, can be used in metallurgy and other industries for combustion of gaseous fuel at various thermal plants, mainly high-temperature ones. The effect is achieved in regenerative burner device containing a regenerative heat exchanger arranged in the furnace lining and having a nozzle from corundum balls put to the housing mounted in the furnace lining and the walls of which are made at an angle of natural slope of corundum balls, which is 30°-35°.

EFFECT: ensuring compactness of regenerative burner device arranged in the furnace lining and its serviceability by replacing corundum balls of the nozzle without stopping the furnace and removing the burner.

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Description

The invention relates to a power system, can be used in metallurgy and other industries for burning gaseous fuels in various thermal units, mainly high-temperature ones.

The REGEMAT regenerative burner device is known (Collection of reports, III International Congress "Peche Pipe Engineering: Thermal Regimes, Structures, Automation and Ecology"). REGEMAT burners are used for high-temperature heat treatment of materials, but their use is limited by the temperature of gases in the furnace not more than 1250 ° C, for a short time 1300 ° C. The burner is characterized by low unit power, as an increase in power up to 500 kW and higher will lead to a sharp increase in its dimensions. The deposition of dusty fine scale accompanying the heating process can lead to an increase in the hydraulic resistance of the regenerative nozzle and, consequently, to a decrease in the thermal power of the burner. Replacement of the regenerative nozzle in the design of the known burner device is not provided.

A regenerative burner device is known (RU 1779880, publ. 1992). The device contains a burner stone located in the masonry of the furnace, an internal ceramic pre-chamber, a gas ring nozzle, a compact bulk regenerator connected to the air supply and smoke exhaust channels, a pipe for supplying combustion air to the regenerator and removal of combustion products after switching the air supply to the second burner.

The bulk regenerator (regenerative nozzle) in the known design is moved outside the furnace, occupying additional space, significantly complicating the design of the burner, because requires a lined adapter pipe between the nozzle and the burner itself.

The objective of the present invention is to provide a simpler to manufacture and maintain a regenerative burner device for burning gaseous fuels in high-temperature heating and smelting furnaces.

A regenerative burner device is proposed that contains a regenerative heat exchanger located in the masonry of the furnace with a nozzle of corundum balls poured into the body mounted in the masonry of the furnace, the walls of which are made at an angle of repose of corundum balls of 30-35 °.

Corundum balls used in the proposed design allow the device to be used in high-temperature heating and melting furnaces. Placing the heat-exchange regenerative nozzle in the masonry of the furnace reduces the external dimensions of the burner device, without occupying the near-furnace space. The design of the nozzle, consisting of corundum balls, poured into a body mounted in the masonry of the furnace, the walls of which are made at an angle of repose of corundum balls, allows replacing balls without stopping the furnace and dismantling the burner device.

A new technical result achieved by the claimed invention lies in the compactness of the regenerative burner device located in the masonry of the furnace and the manufacturability of its maintenance by replacing the corundum balls of the nozzle without stopping the furnace and dismantling the burner device.

The invention is illustrated in the drawing. A body 2 is placed in the masonry 1 of the furnace, the walls 3 of which are mounted at an angle of repose of corundum balls 4 poured into the body 2. The angle of repose is selected experimentally and is 30-35 degrees. The nozzle of the regenerative heat exchanger on one side of the air-cooled grill 5 enters the burner stone 6, and on the other grill 7 is connected to the collector 8. A pipe 9 is used to supply combustion air to the burner device and to remove combustion products after it. Inside the nozzle, a gas lance 10 with a pilot light is mounted, which is located in a channel made of two coaxial pipes 11. On the body 2, a lower drain hatch 12 and an upper loading hatch 13 are made for corundum balls.

The device operates as part of a block module of two burners as follows. The first burner operates in the "burning" mode. Air for burning natural gas is supplied through the pipe 9 to the collector 8, sequentially passes through the collector lattice 7, the regenerative nozzle from corundum balls in which it is heated, and flows through the air-cooled lattice 5 into the space of the burner block, where it is mixed with natural gas flowing through gas lance 10, and is ignited by the built-in igniter. Air is pumped along the inner part of the channel of the coaxial pipes 11 of the gas lance 10 to cool the grill 5, and on the outside it is discharged from the air-cooled grill 5 and can also be directed to the collector 4, where it is mixed with the main combustion air. Air cooling of the gas lance prevents the heating of natural gas to temperatures above 400 ° C and, as a result, the precipitation of soot carbon.

The second burner, which can be placed on the opposite wall of the furnace or next to the first burner, at this point in time acts as a chimney. The solenoid valves on the gas and burner ducts are closed and open on the chimney. In this case, under the influence of the vacuum created by the smoke exhaust, the flue gases are discharged through the air-cooled grate 5, the regenerative nozzle is heated, through the grate 7 they enter the collector 8 and then the smoke exhaust is discharged into the chimney.

The system operates in a pulsed mode. Every 30-45 from the direction of air and flue gas flows are reversed - first, one burner operates in the gas combustion mode, and the other, respectively, in the exhaust gas mode and vice versa.

The flue gases discharged from the furnace may contain dust particles, scale, which clog the regenerative nozzle, increasing its resistance. When the limit value of resistance is reached, the nozzle is replaced without stopping the furnace and removing the burner. To do this, open the lower drain hatch 12 on the housing 2, pour some of the corundum balls from the lower unused volume of the housing 2 of the regenerative heat exchanger, they are replaced by corundum balls from the interlattice, and new corundum balls come in from above, occupying the entire volume between the collector grating 7 and an air-cooled grill 5. Through the upper loading hatch 13 on the housing 2, additional corundum balls are additionally filled, which, rolling down at an angle of repose, uniformly fill Entire volume of packing.

Claims (1)

A regenerative burner device containing a regenerative heat exchanger located in the masonry of the furnace with a nozzle made of corundum balls poured into a housing mounted in the masonry of the furnace, the walls of which are made at an angle of repose of corundum balls of 30-35 °.