A box type gas heat treatment furnace

Abstract

The invention relates to a box-type gas heat treatment furnace, which includes a furnace shell and a furnace. The furnace shell is a rectangular box-shaped body. The furnace shell is provided with a material inlet and a material outlet. There is a high-temperature flue gas inlet; the inside of the furnace shell is provided with an annular flue gas passage, the left and right sides of the flue gas passage are connected with the furnace, and the outside of the furnace shell is provided with a vertical flue connected with the flue gas passage; The material storage rack is placed under the high-temperature flue gas inlet and communicates with the flue gas passage, and the two ends of the material storage rack are respectively airtightly connected with the inner wall of the furnace shell. The present invention cancels a plurality of flue gas exhaust pipes provided on the traditional heat treatment furnace, directly adds a flue gas channel inside the furnace shell, and sets a vertical flue connected with the flue gas channel outside the furnace shell, so that the heat exchange in the furnace The final flue gas enters the flue gas channel and is output through the vertical flue, which simplifies the pipeline arrangement and reduces the production cost. The pressure of the flue gas circulation in the furnace is uniform, the heat utilization rate is high, and the heat loss is small.

Description

[0001] Technical field: [0002] The invention relates to a heat treatment furnace, in particular to a box-type gas heat treatment furnace. [0003] Background technique: [0004] Recently, the heat treatment of workpieces is generally heated by resistance furnaces. However, due to the long heating time and high energy consumption, especially for high-temperature heat treatment of large workpieces and special materials, the thermal efficiency and high-temperature stability of resistance furnaces cannot meet the needs of actual production. . [0005] Such as figure 1 As shown, the traditional box-type heat treatment furnace has a plurality of small holes 2' for the circulation of exhaust pipes in the furnace body 1', and a plurality of exhaust pipes 3' communicating with the small holes are respectively arranged in the walls on both sides of the furnace mouth. , the flue gas in the furnace is led out through a plurality of exhaust pipes through a pipe, thereby effectively ensu...

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Problems solved by technology

[0007] In the actual use process, according to the applicant, although the design of the flue arrangement at the furnace bottom of the heat treatment furnace can improve the heating efficiency and the uniformity of the furnace temperature, the flue arrangement design is intricate, difficult to maintain, and the production cost is high

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