SU1260651A1 - Chamber furnace - Google Patents

Description

The concept refers to furnace heating technology and can be used in the metallurgical, refractory, porcelain and other industries.

The purpose of the invention is to improve the quality of the calcined material, thermal efficiency and operational reliability of the furnace.

FIG. 1 shows a chamber furnace, a vertical section, in FIG. 2, a working chamber, in FIG. 3, section A-A in FIG. 2; in fig. 4 shows a section BB in FIG. 3 (fuel burner and injector); in fig. 5 is a diagram of the paths for the selection of products of combustion and the supply of the oxidant of the chamber furnace.

The furnace contains a working chamber 1, a fence 2 with contour cavities 3 and 4, the contour cavity 3 communicating via the connecting pipe 5 with burners 6 of the fuel ignition devices and recuperators 7 and 8, and the contour cavity 4 communicates with burner tunnels 9, injectors 10 topJVIvZhigak) devices with regenerators 11 and 12, gas ducts 13-16, filter nozzle 17, connecting pipes 18, 19 and 20, tons of waste products, smoke exhausters 21, 22 and fans 23, 24, exhaust devices 25 and 26, gate valves 27-32, dampers 33-36, shut-off devices 37 and 38, selection 39 channels, a trolley 40 with a bolt 41 perforated-channeled under 42, a gas-permeable cage 43, a lowering device 44.

The high-temperature chamber furnace works as follows.

A trolley 40 with a perforated kalowed hearth 42, sealed with a valve 41 and a gas permeable booster 43 is installed in the working chamber 1 with the help of a lifting and lowering device 44. The exhaust fan and the fan 23 are turned on, with the open gates 28 and 29, the shut-off device 38 and the shutters 34 and 35; The fuel supplied to the tangentially located burners 6 of the fuel-burning devices and mixed in them with the oxidizer flowing through the connecting pipelines 5 from the loop cavity 3 comes from the burners 6 of the fuel-burning devices to the burner tunnels 9.

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Mixture pulling out of the burners at high speed

Due to the injection effect of the jets, an additional oxidizer from the contour cavity 4 is sucked in. The final gas mixing process takes place, and the mixture is prepared through the burner tunnels 9 and enters the working volume of the furnace 1, tangentially washing the gas-permeable cage 43 from the periphery to the center. The products of combustion through perforated sewer under 42 fall into the selection channels 39 with open gates 27 and 28, filter nozzle 17 passes, the flue 15 and enters the regenerator 11, while the gate 30 is closed. Then, through the open shut-off device 38, the combustion products pass through the heat exchanger 7 and from it by the smoke exhauster 21 are sent to the exhaust device 26. The oxidant fan 23 is injected into the heat exchanger 7 and from it through the connecting pipes 18, 19 and 20 when the damper 34 is open, it flows into the contour cavity 3,: communicating through connecting pipes 5 with burners 6, and partially to regenerator 12 with open valve 35, where it is heated to a higher temperature, and through gas duct 13 with open gate 27 enters contour cavity 4, co schayuschuyus with burners tunnel E 9, and via injector 10 enters the working chamber 1.

The contour cavities 3 and 4, located in the fencing 2 of the chamber furnace and serving as containers for the oxidizer, ensure uniform heating of the masonry, evenly distribute the uncooled oxidizer supplied to the fuel-burning devices and ensure the high-temperature high-speed heating of the products in the furnace due to the storage heat fencing walls.

In addition, the presence of contour cavities ensures uniform cooling of the products and the furnace fencing during its cooling, since the cooling agent can be supplied preheated in the recuperator or regenerator, which has a positive effect on the quality of the products (the thermal shock) and durability of the furnace fencing, i.e. its reliability. The presence of a filter nozzle prevents the regenerator from contamination by suspended particles of combustion products, increasing its reliability and ensuring high-quality heating of the oxidizer.

Performing contour cavities at the level of the working volume allows reducing heat losses through enclosures and compensating for thermal expansion over the cross section of the furnace enclosure, and the location of the injectors in the contour cavity communicating with

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burner tunnels and a regenerator at the place of installation of fuel-burning devices provide an even heating of the fence, an intensification of heat exchange in the contour cavity, and a uniform supply of oxidant to the burner tunnel.

In addition, any reagent required by firing technology can be fed into the kiln through the contouring cavity communicating with the regenerator.

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Phage.

Combustion Products

Oxidation on the burning

Editor M. Bandura

Compiled by L. Matsuk Tehred L. Serdyukova

Order 5213/35

Circulation 561 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

fpu2.5

Proofreader T. Kolb

Claims (2)

1. A CHAMBER FURNACE containing a working chamber with a guard, tangentially placed burner devices with injectors, a recuperator, flues, draft fans, characterized in that, with the aim of improving the quality of the fired material, thermal efficiency and operational reliability. the furnace, it is equipped with regenerators, and burner tunnels and contour cavities are made in the furnace enclosure, the contour cavity located closer to the furnace working volume connected to the burner tunnels and regenerators, and the cavity located closer to the outer surface> with burners and a recuperator. 2. Oven pop. 1, characterized in that the injectors usta- _β Credited in the cavity S located closer to the operating volume, coaxially go- f relochnym tunnels. V 126'0651