Novel gas/coal dual-purpose fluidized-bed hot-blast furnace and control method

Abstract

The invention discloses a novel gas / coal dual-purpose fluidized-bed hot-blast furnace. The novel gas / coal dual-purpose fluidized-bed hot-blast furnace comprises a fluidized-bed furnace, wherein the fluidized-bed furnace is divided into a main hearth and an auxiliary hearth, the main hearth is provided with two furnace beds, and a division wall is arranged between the furnace beds; and a fire-stopping wall is arranged between the main hearth and the auxiliary hearth, air blowing air hoods are arranged at the bottoms of the main hearth and the auxiliary hearth, the air blowing air hoods are installed on an air blowing air plate, a main hearth air bellow and an auxiliary hearth air bellow are arranged below the air blowing air plate, the main hearth air bellow is connected with the air outletof an air blower, the auxiliary hearth air bellow communicates with the main hearth air bellow through an air pipe; a main burner and a flame detector are arranged at the lower middle part of a partat one side of the main hearth of the fluidized-bed furnace, of a furnace wall; and a gas combustion-stabilizing burner and a liquefied gas igniter are arranged on a part on the adjacent surface, of the furnace wall. The invention aims at providing a novel gas / coal dual-purpose fluidized-bed hot-blast furnace and a control method. A single-fire-coal fluidized-bed hot-blast furnace is enabled to beadaptive to a gas / coal dual-purpose fluidized-bed hot-blast furnace, and surplus blast-furnace gas is adequately utilized through single use or mixed use, so that the fire coal cost is lowered.

Description

technical field [0001] The invention relates to a novel gas-coal dual-purpose fluidized hot-blast stove control method, and is especially suitable for coal and blast furnace gas single-use or mixed-use hot-blast stoves and the control method. Background technique [0002] The fluidized fluidized furnace is a coal-fired furnace developed in recent years. It can not only burn high-quality coal, but also burn various types of low-quality coal that cannot be burned by general grate furnaces and chamber furnaces. It has good combustion effect and high thermal efficiency. [0003] However, nowadays, environmental protection requirements and coal prices are increasing day by day, and many companies are beginning to find ways to use other energy sources instead of coal. Blast furnace gas has low combustible components, unstable combustion, low combustion temperature, and large flue gas volume. It was not paid attention to by everyone before, but it is gradually used due to the need ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above problems, to provide a new type of gas-coal dual-purpose boiling hot blast stove and its control method, to fully utilize the advantages of coal-fired boiling hot-blast stove, and to adapt a single coal-fired boiling hot-blast stove to gas-coal dual-purpose The fluidized hot blast stove, through single or mixed use, makes full use of surplus blast furnace gas and reduces coal-fired costs; overcomes the difficulty of starting and igniting the single coal-fired fluidized fluidized furnace, easy coking, unstable hot air caused by unstable gas supply of a single gas hot blast stove, etc. question

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