Tamping coke high-pressure high-temperature CDQ (coke dry quenching) waste heat boiler

Abstract

The invention relates to a tamping coke high-pressure high-temperature CDQ (coke dry quenching) waste heat boiler which utilizes high-temperature waste heat of circulation inert gas to generate high-pressure high-temperature steam in CDQ for a tamping coke oven. The waste heat boiler is composed of a hot-water heating section, a vaporization system and a superheating system, wherein the hot-water heating section is mainly composed of an auxiliary economizer, a low-temperature economizer, and a high-temperature economizer which are all in a spiral extended surface tube structures; the auxiliary economizer is arranged on the tail of the boiler, and the auxiliary economizer is connected with a thermal deaerator used for deoxidizing water which is not deoxidized after the effluent of the economizer; the thermal deaerator is respectively connected with the low-temperature economizer, and the high-temperature economizer and finally connected with a boiler barrel of a vaporization system through a connecting pipe sequentially; a natural cycle system is adopted for the waste heat boiler provided by the invention, and a forced circulation pump is not arranged, the potential fault point is reduced, and the power consumption is saved; and the superheating system comprises a low temperature superheater, an attemperator, and a high-temperature superheater, the high-temperature superheater is arranged in a downstream manner, the heat of the stable high-temperature superheater is transferred uniformly, thereby avoiding overtemperature booster of a superheater tube.

Description

technical field [0001] The present invention relates to a high-temperature and high-pressure tamping coke CDQ waste heat boiler, which is applied to dry coke quenching tamping coke ovens, and utilizes dry coke quenching (CDQ: Coke Dry Quenching) to extinguish the high temperature waste heat of inert gas of red hot coke, It enters the CDQ boiler to release heat, and the low-temperature exhaust gas circulates and extinguishes coke. Boilers generate high-temperature and high-pressure steam to generate electricity and save energy. Background technique [0002] Coke is mainly used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals. At present, the mainstream coking method is the top-loading basket coke oven, but in recent years, the use of side-loading tamping coke ovens has been greatly developed. [0003] Compared with the top-loading coke oven, the biggest advantage of the ramming coke oven is that the coal blending for coking can increase the weak c...

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Problems solved by technology

[0007] Compared with the top-loading coke oven, the stamped coke coke cake is very large and dense, and it is extremely difficult to quench the coke, and the coke quenching time is as long as 20 to 30 hours. Both the coke process and the CDQ waste heat boiler are quite difficult

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