A large cycle process for industrial tail gas recovery and utilization

Abstract

The invention discloses an industrial tail gas recovery and recycle major cycle technology. Through water-gas indirect heat exchange, boiler waste heat is utilized. Through boiling purification, dedusting and absorption purification are realized. Through water mist ammonia distillation dedusting, a catalyst is provided for a follow-up process and dedusting effects are obtained. Through fixed bed crossing purification, adsorbent adsorption functions and catalysis effects are obtained. Through water soluble method-based repeated desorption, adsorbate desorption is finished and a modification liquid is provided for adsorbent carriers. Through flowing air feeding purification, mixed adsorption, conversion, catalysis and oxidation of the adsorbent, adsorbate and oxidizing agent are realized. Through adsorbent adsorption and loading, the conventional gas-liquid chemical conversion is changed into solid-liquid conversion. Through a terminal purifier, alkali production based on an ammonia process is realized and sodium bicarbonate is produced. The technology realizes physical absorption, chemical conversion, loaded carrier catalysis and oxidation in the whole process by a simple method and simple equipment, realizes harmless use of hazardous substances in flue gas and realizes industrial tail gas recovery and recycle major cycle.

Description

Technical field: [0001] The invention relates to the field of air purification, in particular to an integrated gas purification method for capturing harmful gases such as carbon oxides, sulfur oxides, nitrogen oxides, and smoke particles in industrial tail gas by using adsorption technology in the field of interface science. Background technique: [0002] Industrial tail gas includes harmful gases such as carbon oxides, sulfur oxides, and nitrogen oxides produced by industries such as fossil fuel combustion, oil refining, cement production, and chemical synthesis, as well as fine dust particles mixed in them. The huge amount of production not only directly causes environmental pollution Pollution, and it continues to spread and accumulate in the atmosphere to form an insulating layer, leading to warming of the earth's climate and triggering climate disasters. [0003] At present, different industries have adopted different capture and recovery methods for different component...

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Problems solved by technology

[0003] At present, different industries have adopted different capture and recovery methods for different components in the exhaust gas, such as chemical conversion method (including calcium method, sodium method, ammonia method, etc.), physical adsorption method, membrane separation method, oxygen-enriched combustion method , laser catalytic method, electron beam irradiation method, catalytic reduction method, etc., but these methods all have many disadvantages of high equipment investment, single effect and high operating cost. Using these methods to collect and transform various harmful gas components is very important in In the process of processing one component, other components cannot be treated at the same time, or the amount of another component is increased by processing one component, causing secondary pollution. Therefore, the purification of industrial tail gas needs to adopt comprehensive capture and centralized purification. One approach

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