Heating surface of high-temperature high-pressure natural circulating dry coke quenching residual heat boiler

Abstract

The invention relates to a heating surface of high temperature and high pressure natural circulation dried coke quenching exhaust-heat boiler, which includes a pipe bundle of front-wall water-cooling wall. Character of the invention is: the pipe bundle of the front-wall water-cooling wall is drawn sparsely to form crust block pipe and educed to boiler ceiling for increasing caloric receptivity and security for water circulation of the front-wall water-cooling wall; the crust block pipe in inlet combustion ashes chamber of the exhaust-heat boiler is made of metal spray coating anti-wear pipe. Advantages of crust block pipe employed by the coke quenching exhaust-heat boiler are: 1. increasing caloric receptivity and security for water circulation of the front-wall water-cooling wall; 2. simplifying pipe structure of leading-out pipe of the front-wall water-cooling wall; 3. reducing flue-gas temperature at import of second level superheater, and guaranteeing operation security of the superheater.

Description

Technical field [0001] The invention relates to a heating surface of a high-temperature and high-pressure dry quenching waste heat boiler. technical background [0002] Dry quenching technology is one of the most eye-catching new energy-saving and environmental protection technologies that have been rapidly developed by foreign ferrous metallurgical conglomerates and coking enterprises in the past decade. It has good social and economic benefits and is adopted by relevant companies in various countries. As an important part of the CDQ device system, the CDQ waste heat boiler plays a role in linking and connecting the various subsystems of the CDQ system, recovering the waste heat of the system, and reducing environmental pollution caused by the CDQ operation. The design and manufacturing technology development of the CDQ waste heat boiler is an urgent issue to be solved to improve the efficiency and safety of the boiler. [0003] At present, the domestic CDQ boilers have not adop...

AI Technical Summary

Problems solved by technology

[0005] Considering the layout of the CDQ system in the CDQ boiler currently in operation, no slag tube is arranged, which results in two unfavorable factors. 1) The heat absorption of the water-cooled wall in the front wall is insufficient, which easily causes water circulation failure. 2. ) The flue gas temperature at the secondary superheater is too high, and the tube bundle material of the superheater must be made of high-temperature-resistant alloy steel, which increases the manufacturing cost of the boiler. Improper operation will cause the tube bundle of the superheater to explode

The above two conditions will seriously affect the safety of the boiler

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