Heat exchanger for raw coke oven gas ascending pipe

Abstract

The invention discloses a heat exchanger for a raw coke oven gas ascending pipe. The heat exchanger for the raw coke oven gas ascending pipe comprises an upper flange, a lower flange and a cylindrical heat exchange assembly located between the upper flange and the lower flange, wherein the lower flange is provided with an annular flame shielding plate extending towards a heat exchange chamber of the cylindrical heat exchange assembly; the diameter of the smoke inlet of the flame shielding plate is greater than the diameter of the smoke outlet of the flame shielding plate; and the smoke outlet of the flame shielding plate is provided with a plurality of flow-disturbing vanes pointing to the center of the smoke outlet from the edge of the smoke outlet. According to the invention, through acceleration of the flame shielding plate and rotation of a guiding device, internal mixing of raw coke oven gas is reinforced, the convective heat-transfer coefficient of the raw gas and the inner wall surface of the heat exchanger is increased, and coking on the wall surface caused by high central temperature of the raw gas and low wall surface temperature is avoided. Damage of dry burning to the inner wall of the heat exchanger is avoided in a means of a built-in sleeve, and normal operation of a coking procedure is guaranteed during maintenance of a steam-water system.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a coke oven raw gas riser heat exchanger. Background technique [0002] The raw coke oven gas takes away 35% of the heat in the coking process, and the recovery of waste heat from the coke oven gas can reduce the energy consumption of the entire coking process by about 10%, which has a great market prospect. When the coke oven raw gas waste heat recovery system is being transformed, the coke oven is still in a high temperature state of 800°C. At this time, the replacement of the riser heat exchanger must be carried out quickly, otherwise the heat exchanger will dry out and the inner wall of the heat exchanger will be damaged. Coating damage. In addition, no matter whether the current riser heat exchanger is a jacket type or a coil type structure, no turbulence device is installed on the raw gas side, and the heat exchange effect is poor. Through the analysis, it can be found that the m...

AI Technical Summary

Problems solved by technology

In addition, no matter whether the current riser heat exchanger is a jacket type or a coil type structure, no turbulence device is installed on the raw gas side, and the heat exchange effect is poor.

Through the analysis, it can be found that the main reason for not installing a spoiler is that the tar component in the raw gas component will condense rapidly when it is lower than 470°C, so the wall temperature of the raw gas heat exchanger cannot be too low during operation, otherwise the coal tar will After condensing on the wall surface, due to its high viscosity, it adheres to the wall, forming a tar residue that is difficult to remove; when the condensed tar flows down along the wall of the heat exchanger and reaches near the inlet of the heat exchanger, it is radiated by the high temperature of the carbonization chamber, and the tar is decomposed twice, causing wall area carbon

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