Air heating furnace with nozzles in pre-burning chamber for reflowing preheating burning by opposed jetting and mixing

Abstract

The invention relates to an air heating furnace with nozzles in a pre-burning chamber for reflowing preheating burning by opposed jetting and mixing. Gas and air inlet pipes on a pre-burning chamber wall are connected with gas and air distribution ring channels which are placed in half of the pre-burning chamber wall respectively, the nozzles on the ring channels are communicated with the pre-burning chamber in the pre-burning chamber wall, a hot air outlet pipe is arranged on the pre-burning chamber wall and connected with a burning chamber wall, a heat storage chamber is arranged on the lower portion of the burning chamber in the burning chamber wall, furnace grills and support columns are arranged on the lower portion of the heat storage chamber, heat retainers are arranged in the heat storage chamber, the support columns are placed in a cold air chamber, the heat storage chamber, the furnace grills and the cold air chamber are placed in an air heating furnace wall, the air heating furnace wall and a furnace bottom are fixed, a smoke outlet pipe and a cold air inlet pipe are arranged on the cold air chamber, and the air heating furnace wall is connected with the burning chamber wall in a sleeving mode. According to the air heating furnace, problems of low mixing rates, uneven mixing, low burning intensities, low burning temperatures, incomplete burning, unstable burning and complicated structures are solved.

Description

technical field [0001] The invention relates to a hot blast stove for preheating and combustion with nozzles in a pre-combustion chamber opposed to injection mixed backflow for providing high-temperature blast for a blast furnace. Background technique [0002] At present, considering energy saving and consumption reduction, blast furnace hot blast stoves are required to obtain high performance and high benefits under the combustion of low calorific value blast furnace gas, and finally achieve the goals of high efficiency, energy saving, environmental protection, and increased production. For this reason, an optimized combustion process must be combined with an enhanced heat transfer process in the hot blast stove. This involves the structure of the combustion device, the structure and arrangement of the heat storage body, and the organization of the air flow field. Looking at the various hot blast stoves currently in use, their gas combustion devices are mainly based on the...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a hot air stove with nozzles in the pre-combustion chamber opposed to the injection mixed backflow preheating combustion, which can effectively solve the problem of low gas and air mixing rate, uneven mixing, and combustion intensity. Low temperature, low combustion temperature, incomplete combustion, large combustion chamber space and complex burner structure

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