Radiation waste-heat boiler

Abstract

The invention provides a radiation waste-heat boiler and belongs to the technical field of heat exchanging. The radiation waste-heat boiler comprises a pressure shell. The pressure shell is provided with a gas inlet and at least one gas outlet, wherein the gas inlet is used for inputting of hot gas, and the gas outlets are used for outputting gas cooled through a cooling device. The pressure shell is internally provided with the cooling device. The cooling device comprises an inner water-cooling wall, at least one pipe panel water-cooling wall is arranged in the circumferential direction of the inner layer water-cooling wall, each pipe panel water-cooling wall is composed of at least two water-cooling wall polished pipes which are connected through fins, one end of at least one pipe panel water-cooling wall is connected with the inner water-cooling wall, the other end of at least one pipe panel water-cooling wall points to the middle axis of the pressure shell, and the water-cooling wall polished pipes are parallel to the middle axis. According to the radiation waste-heat boiler, the heat exchange amount of unit space of the radiation waste-heat boiler is increased, and the equipment size is reduced.

Description

Technical field [0001] The present invention relates to the technical field of heat exchange, in particular to a radiation type waste heat boiler. Background technique [0002] Radiant waste heat boiler is a key equipment for sensible heat recovery in the energy and chemical industry. It is widely used in the recovery of sensible heat of high-temperature gas to improve the utilization rate of high-temperature gas heat. [0003] In the coal gasification system, usually, the radiant waste heat boiler is directly connected to the gasifier. The high temperature gas discharged from the gasifier contains a large amount of sensible heat. After these high temperature gases enter the radiant waste heat boiler, the radiant waste heat The water wall inside the boiler will first absorb the heat in the high-temperature gas through heat exchange, thereby reducing the temperature of the high-temperature gas. However, the traditional radiant waste heat boiler is arranged in a cylindrical shape. O...

AI Technical Summary

Problems solved by technology

However, the traditional radiant waste heat boiler is set in a cylindrical shape. Once the size of the cylinder of the radiant waste heat boiler is determined, the heat absorption area of ​​the water-cooled wall installed inside will be determined accordingly. Of course, the heat absorption of the water-cooled wall will also be will be determined accordingly

If it is necessary to reduce the temperature of the high-temperature gas at the outlet of the gasifier to a certain value, it is necessary to set a larger cylinder diameter or a longer water-cooled wall tube, which will result in a larger equipment size and lower heat exchange per unit space

[0004] However, the heat transfer per unit space of the radiant waste heat boiler in the prior art is low, and the size of the equipment is relatively large

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