Stand pipe square box furnace

Abstract

The invention relates to the field of chemical equipment, and discloses a stand pipe square box furnace. The stand pipe square box furnace comprises a square box shaped radiation chamber, two middle furnace walls, a first combustor, a second combustor and a plurality of radiation furnace pipes, wherein the plurality of radiation furnace pipes are in the radiation chamber and are arranged into a square ring shape; the two parallel middle furnace walls are arranged in a square ring shaped region defined by the radiation furnace pipes; the first combustor is arranged between the two middle furnace walls; the second combustor is positioned on one side, far away from the first combustor, of the middle furnace walls; the height of the middle furnace walls is smaller than that of the radiation furnace pipes; the radiation furnace pipes comprise first furnace pipes arranged in the extending direction of the middle furnace walls and second furnace pipes perpendicular to the extending direction;a process medium enters the second furnace pipes and is discharged from the first furnace pipe. The middle furnace walls divide the interior of the radiation chamber into a plurality of heating regions in the height and width directions, the heat intensity peak in the height direction of the first furnace pipes is reduced, and the second furnace pipes can reach relatively high average heat intensity.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a vertical tube furnace. Background technique [0002] Vertical tube square box furnace is an important heating equipment in the chemical industry. Such as figure 1 As shown, in the radiation chamber 10 of the existing vertical tube furnace (that is, the furnace tube is vertically arranged in the radiation chamber), several radiation furnace pipes 50 arranged vertically against the wall are arranged, and the burner F Arranged in rows in the cavity surrounded by radiant furnace tubes 50 , the heat of the burners F is transferred to the surrounding radiant furnace tubes 50 through radiation and convective heat transfer to heat the process medium in the radiant furnace tubes 50 . The process medium is usually divided into two or four feeds through the radiant furnace tube 50, figure 1 Four feeds are shown. [0003] The existing vertical tube square box furnace has the following...

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Problems solved by technology

[0004] The object of the present invention is to provide a square box furnace with vertical tubes in order to overcome the problems in the prior art that the heat intensity of the furnace tubes in the radiant chamber of the vertical tube furnace cannot be flexibly adjusted and the thermal intensity in the direction of the height of the furnace tubes is not uniform. The square box furnace has an improved heat intensity distribution, and the heat intensity of the furnace tube can be flexibly adjusted

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