Ball-shape top-burning type hot-air furnace with annular-arranged vertical up-spray burner

Abstract

The invention relates to a spherical top combustion hot air furnace with annularly distributed and vertically upward-jetting burner, and its structure: the lower part of the furnace body is equipped with flue hole, furnace bottom and furnace grate, a heat storage room is in the furnace body, there is a burner between the upper part of the furnace body and the furnace top, the furnace top is made with hot air outlet, there is coal gas preheating loop in the wall body of the burner, there is combustion supporting air preheating loop in swelling body at the upper part of the coal gas preheating loop, there are coal gas outlet and top nozzle at the upper part of the coal gas preheating loop, the wall body of the burner is equipped with coal gas inlet connected with the coal gas preheating loop, the wall body of the burner at the upper part of the coal gas inlet is equipped with combustion supporting air preheating loop connected with combustion supporting air inlet and outlet, the upper part of the air outlet is equipped with air nozzle. And the invention has a special and novel structure, and skillfully solves the key problems in the gas-flow mixing, gas-flow distribution, fume preheating and other combustion courses and has huge economic and social benefits.

Description

1. Technical field [0001] The invention relates to a combustion device, in particular to a spherical top-combustion hot blast stove with an annular arrangement of vertically upward-injecting burners. 2. Background technology [0002] The hot blast stove is an important auxiliary equipment for the blast furnace ironmaking project. It is a periodic operation device for intermittent heating and cooling. Its performance directly affects the normal operation, efficiency and service life of itself and the blast furnace. At present, the most commonly used structural forms are internal combustion type, external combustion type and top combustion type. Due to the advantages of high combustion intensity, short flame distance and relatively simple structure, the top combustion type hot blast stove has achieved considerable development in recent years. , is widely used in the blast furnace hot air supply, however, there are still many places worthy of technological innovation and resear...

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Problems solved by technology

[0003] In view of the above situation, the object of the present invention is to provide a new spherical top-fired hot blast stove with annular arrangement of vertically upward jetting burners, which can effectively solve and overcome the uneven distribution of combustion airflow temperature and velocity in existing top-fired hot blast stoves. Even, the overall heat transfer effect is poor and the structure is unreasonable. The technical solution is to include the furnace (arch) roof, combustion chamber, ceramic burner and furnace body. The lower part of the furnace body has a flue opening and a furnace bottom. The furnace body at the upper part of the crossing is equipped with a grate, and the furnace body is a regenerator. There is a ceramic burner between the upper part of the furnace body and the furnace roof, and it is placed at the lower part of the combustion chamber. There is a hot air outlet on the furnace roof. The wall of the ceramic burner There is a vertical gas preheating ring in the body, and a vertical combustion air preheating ring in the upper expansion body. There is a vertical gas outlet and a nozzle on the top of the vertical gas preheating ring. On the wall of the ceramic burner There is a gas inlet connected to the vertical gas preheating ring, the ceramic burner wall above the gas inlet has a vertical combustion air preheating ring connected to the combustion air inlet and the combustion air outlet, and there is an air nozzle on the upper part of the air outlet

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