Large-scale shaft furnace quenching oil fume non-secondary pollution circulating purification and recovery system

CN122342971APending Publication Date: 2026-07-07TLON TECHN FURNACES WUXI

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: TLON TECHN FURNACES WUXI
Filing Date: 2026-05-25
Publication Date: 2026-07-07

AI Technical Summary

Technical Problem

During the quenching process of large pit furnaces, the treatment of oil mist exhaust gas suffers from rapid saturation, the need for frequent replacement of consumables, and the risk of secondary pollution. Furthermore, the oil recovery is incomplete, and there is a lack of efficient purification and recycling mechanisms.

Method used

The system employs a combination of a fume hood, a spray-type oil fume separation tower, and an oil-water separation box. It captures oil fumes through a stepped structure and a nitrogen curtain seal, separates oil and gas using a multi-stage centrifugal pump and atomizing nozzles, and achieves oil-water separation using a gravity valve and a float assembly, forming a closed-loop recycling system.

Benefits of technology

It achieves efficient purification of oil fume particles, improves the quality of oil recovery and recycling efficiency, avoids secondary pollution in waste gas treatment, and simplifies the waste disposal process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a large-scale shaft furnace quenching oil fume secondary pollution-free circulating purification and recovery system, relates to the technical field of industrial furnace waste gas treatment, and comprises an oil-water separation tank and a smoke collecting hood arranged at the furnace mouth of the large-scale shaft furnace. The air inlet of a suction fan is connected with the side of the smoke collecting hood through a flow guide pipe, and the air outlet of the suction fan is connected with a spray type oil fume separation tower. The spray type oil fume separation tower is used for separating oil gas from oil-containing flue gas, and the exhaust end of the spray type oil fume separation tower is connected with a smoke stack. The application has the following technical advantages: the step type structure and nitrogen curtain sealing of the smoke collecting hood are adopted to collect oil fume in a directional manner, the unorganized diffusion of waste gas is avoided, the spray type oil fume separation tower is arranged to make water mist and flue gas fully mix, collide and coagulate, and efficient purification of oil fume particles in flue gas is realized; and through the arrangement of a specific gravity valve and an oil inlet pipeline, primary oil-water separation of the mixed liquid and effective accumulation of high-concentration oil liquid can be realized when circulating water is supplied to the spray type oil fume separation tower.

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