A full-time combustion heat exchange furnace

Abstract

The invention discloses a full-time combustion heat exchange furnace and relates to the technical field of heat energy. The full-time combustion heat exchange furnace comprises a smoke outlet, at least one cold air inlet, a heat exchange chamber, at least one hot air outlet, a combustion chamber, an air pipeline, a gas pipeline and a mixing chamber. The mixing chamber is connected with the air pipeline and the gas pipeline, the preheated air and gas enter the combustion chamber to combust after being mixed in the mixing chamber, and the generated high-temperature smoke is exhausted through the smoke outlet after being subjected to heat exchange in high-temperature smoke channels densely distributed in a heat exchange body in the heat exchange chamber. Meanwhile, cold air enters the heat exchange chamber through a cold air circulating pipe and the cold air inlet so as to be subjected to heat exchange with the high-temperature smoke, and the heated cold air enters a hot air circulating pipe through the hot air outlet and is delivered to a blast furnace. By using the full-time combustion heat exchange furnace, an intermittent air supply way that the furnace is firstly heated to heat a heat accumulator, then, furnace heating is stopped, and next, the cold air is heated through the heat accumulator in the existing hot air furnace is changed, and a continuous air supply way that furnace heating and heat exchange are simultaneously carried out is realized. The heat efficiency is increased, the investment and the floor area are reduced, and the manipulation strength and the operation cost are reduced.

Description

technical field [0001] The invention relates to the technical field of thermal energy, in particular to a hot blast stove, an auxiliary equipment for ironmaking blast furnaces, and in particular to a full-time combustion heat exchange furnace. Background technique [0002] The hot blast stove is a special facility for providing hot air to the blast furnace. Its working principle is to generate high-temperature flue gas through the combustion of gas by the burner, heat the regenerator in the regenerator of the hot blast stove, and then let the cold wind pass through the regenerator and combine with the regenerator. According to the position of the burner of the hot blast stove, the hot blast stove can be divided into several structural forms such as internal combustion hot blast stove, external combustion hot blast stove and top combustion hot blast stove; [0003] The problems existing in the existing hot blast stove are as follows: [0004] 1. In the existing hot blast sto...

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Problems solved by technology

[0004] 1. In the existing hot blast stoves, the furnace is fired first to heat the regenerator, then the furnace is stopped, and then the cold air is heated by the regenerator and sent to the blast furnace, that is, the method of combustion-heat storage-heat exchange, because each hot blast stove has Only intermittent air supply is available, while blast furnaces need continuous smelting, so each blast furnace must be equipped with 3 to 4 hot blast stoves, resulting in high investment, large floor space and long construction period;

[0005] 2. The unit heat transfer area of ​​the regenerator of the existing hot blast stove is small, and the heat transfer capacity is poor, resulting in low thermal efficiency;

[0006] 3. The existing hot blast stove is composed of a large number of steel structures and refractory materials, which is bulky, and the installation and masonry period is long;

[0007] 4. Due to the intermittent air supply of the existing hot blast stove, it is necessary to continuously switch between the state of burning furnace, air supply, and furnace replacement. short, expensive to run

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