SU1740923A1 - Graphitization furnace - Google Patents

Abstract

Use: production of carbon materials. Invention: A core of graphite products placed in carbon bedding is installed in the working chamber of the furnace. Vertical perforated carbon tubes are installed close to the items in the backfill. The tubes are made with open upper ends located at the level of the top of the carbon bed. 2 yl

Description

The invention relates to the production of carbon materials, in particular to the graphitization of carbon products while simultaneously burning off the exhaust gases.

The closest in technical terms to the proposed device is a graphitization furnace for carbon products, which is provided with vertical perforated carbon tubes installed in thermal insulation, made with plugged ends at the top of the thermal insulation and designed to drain volatile gases through the side walls of the furnace.

A disadvantage of the known construction is the lack of reliability of afterburning of the gases resulting from graphitization.

The aim of the invention is to ensure the afterburning of flue gases.

FIG. 1 shows a vertical section of a graphitization furnace: FIG. 2 shows a variant of the placement of the tubes in the charge layer.

The graphitization furnace contains a working chamber 1, an umbrella 2 and a core of graphite products 3 placed in a layer of carbon bed 4.

Vertical perforated carbon tubes 5, fitted with open upper ends located at the level of the top of the carbon bed, are installed close to the products.

The graphitization furnace works as follows. When an electric current is injected, the product 3 and the charge material between them and around them are heated and when a certain temperature level is reached, gases start to emit. Through the holes in the walls of the pipes 5 gases penetrate into the pipe and then into the subzontovoy space, where the pressure is reduced due to the suction of gases. In a furnace without perforated tubes, the evolved gases pass through the layer of heat insulating charge, cooling down, and under the umbrella fall at a temperature insufficient for self-ignition. Thereafter, gases (hydrogen, carbon monoxide, oxides of sulfur) are released into the atmosphere - contaminated. Along with this, there are cases when combustible gases accumulate in the stagnant zones of the sub-flood space and then in case of accidental

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In the proposed solution, the aerodynamic resistance of the pipes is many times less than the resistance of the mixture, due to which the gases quickly come under the umbrella, practically not cooling, since the pipe is surrounded by thermal insulation in the form of a mixture. In addition, the pipe itself, made of a material that conducts heat well, such as graphite, is a channel through which heat is intensively transported from the core of the furnace to the upper section of the pipe. As a result, the temperature of the top practically does not differ from the temperature of its bottom, which is located in the hottest zone of the furnace, the zone of evolution of gases.

Thus, the gases that fall on the hot section of the pipe are combined with the oxygen of the air, which is always present, and ignite, thereby initiating the combustion of gases that fall under the umbrella in other ways. The result is a reliable afterburning of the exhaust gases of the graphitization furnace without any additional energy costs.

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In the proposed technical solution, gases and heat released from the most hot zone of the furnace are transported through the heat and gas channel and the guaranteed contact of the hot gases and heated upper ends of the tubes and air under the furnace umbrella is ensured. . the afterburning process is provided with intrahepatic energy resources, and there is no need to equip the furnace with a more complex and expensive afterburning system or other disposal of exhaust gases.

Formula and graphitization furnace, containing a working chamber with a core of graphite products placed in a carbon bed, and installed in it vertical perforated carbon pipes closely to the products, that, in order to provide afterburning of waste gases, carbon perforated tubes are made with open upper ends located at the top of the carbon bed.

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Claims (1)

Claim A graphitization furnace containing a working chamber with a core of graphite products placed in a carbon backfill and vertical perforated carbon tubes installed in it close to the products, characterized in that, in order to provide afterburning of the exhaust gases, the carbon perforated tubes are made with open upper ends located at the top of the carbon backfill.