Gas type steam superheating device

Abstract

The invention relates to a gas typed steam overheat device suitable for the recovery and utilization of the waste heat of enterprises, comprising a steam filer (1), a flue gas-steam heat exchanger (4), a flue gas generation device (6) and a burner (10). The fuel gas and combustion air are mixed in the burner (10) and are burned in a combustion chamber (9) of the flue gas generation device (6) so as to generate high-temperature flue gas to enter the mixed chamber (7) of the flue gas generation device (6); cold air enters the mixed chamber (7) so as to cool the high temperature flue gas mixture and then enters the flue gas-steam heat exchanger (4); a fire retaining wall (8) is arranged between the combustion chamber (9) and the mixed chamber (7). The saturated steam is delivered to the flue gas-steam heat exchanger (4) by the steam filter (1) and is output after being heated into overheat steam. The gas typed steam overheat device has low requirement to the material and long service life, can take a low heat value gas of the by-products of the enterprises as the fuel; furthermore, the combustion is stable, the generated steam has good quality, the delivery distance can be increased, and the application range of the waste heat steam can be enlarged.

Description

technical field [0001] The invention relates to a steam superheating device, in particular to a gas-fired steam superheating device which uses low calorific value gas to heat saturated steam into superheated steam. Background technique [0002] At present, domestic high-energy-consuming enterprises generally use the waste heat of flue gas or materials to generate low-pressure saturated steam to recover waste heat, save energy and reduce consumption, and improve the comprehensive economic benefits of enterprises. However, because the general waste heat utilization equipment produces saturated steam, the range of users of this steam is limited, and the further improvement of its economic benefits is also affected. [0003] For example, the converter system of a steel plant adopts the converter flue vaporization cooling system, which effectively recovers the waste heat of the converter gas, and the large amount of saturated steam generated is mainly input into the low-pressure ...

AI Technical Summary

Problems solved by technology

However, due to the limited heat load of low-pressure domestic users and the influence of seasons, a large amount of waste heat steam is discharged, especially in summer, and the utilization rate of waste heat is very low

[0004] At the same time, since most of the steam generated by using factory waste heat is saturated steam, the steam loss along the transportation pipeline is relatively large, and its transportation distance is limited. This is also one of the factors that affect the effective use of steam generated by waste heat utilization equipment.

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