Waste heat boiler used for waste sulfuric acid cracking regeneration device and flue gas treatment method

Abstract

The invention discloses a waste heat boiler used for a waste sulfuric acid cracking regeneration device and a flue gas treatment method. The waste heat boiler comprises a front smoke box, a boiler body and a rear smoke box which are in sequential communication, multiple heat exchange pipes are arranged in the boiler body, a center pipe is arranged in the center in the boiler body, an adjusting valve is arranged at an outlet of the center pipe, inlets of the heat exchange pipes and an inlet of the center pipe communicate with the front smoke box, and outlets of the heat exchange pipes and the outlet of the central pipe communicate with the rear smoke box. The waste heat boiler can effectively avoid dew point corrosion of pipelines and equipment, the service life of the boiler is prolonged, construction cost is low, operation is convenient, and the occupied area is saved.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection, and in particular relates to a waste heat boiler used in a waste sulfuric acid cracking regeneration device and a method for treating flue gas. Background technique [0002] Various chemical plants in my country, such as sulfonation, alkylation, hydration hydrolysis, purification and dehydration processes, will produce a large amount of waste sulfuric acid by-product every year, and a large part of the waste sulfuric acid contains a large amount of organic impurities and inorganic salts. It is extremely difficult to deal with it by traditional methods, which brings great environmental pressure to enterprises. [0003] At present, the most thorough and environmentally friendly process for treating this kind of waste sulfuric acid is the waste sulfuric acid pyrolysis regeneration process. In the waste sulfuric acid pyrolysis regeneration process, the temper...

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Problems solved by technology

[0005] The present invention aims at the existing waste sulfuric acid pyrolysis and regeneration process, which usually sets a crossover line at the inlet and outlet pipes of the waste heat boiler to adjust the flue gas temperature at the outlet of the waste heat boiler. The use of a high-temperature-resistant butterfly valve resistant to high-temperature flue gas at 1100°C has technical problems such as large floor space, high construction costs, and inconvenient operation. A new waste heat boiler for waste sulfuric acid cracking and regeneration equipment is provided. The waste heat boiler adopts The central pipe performs short-circuit regulation of the flue gas, eliminating the need for bypass pipes and butterfly valves, which can effectively avoid dew point corrosion of subsequent pipes and equipment, prolong the service life of the boiler, and have low construction costs, easy operation, and save floor space

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