Coking plant gas desulfurization unit precooling tower liquid supplementing optimization system and process thereof

By using high-quality condensate with low ammonia and low sulfur in the gas desulfurization unit of the coking plant to replace the remaining ammonia water, the cooling circulation liquid of the pre-cooling tower is optimized, and the equipment corrosion problems caused by the circulating liquid absorbing sulfide and thiocyanide are solved, and the long-term stable operation of the equipment and the improvement of ammonia water quality are achieved.

CN120272246APending Publication Date: 2025-07-08ZHONGTIAN IRON & STEEL GRP (NANTONG) CO LTD +1
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510467572.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-15
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

In the existing gas desulfurization process of coking plants, the ammonia water in the circulation liquid absorbs sulfide and thiocyanide, causing inferior ammonia water to corrode the cold drum equipment, and the content of sulfide and thiocyanide cannot be effectively controlled.

Method used

High-quality condensate with low ammonia and low sulfur is used to replace the remaining ammonia water as the cooling circulation liquid of the pre-cooling tower. By optimizing the system structure and process flow, the absorption of sulfide and thiocyanide by the circulation liquid is reduced and the corrosion risk of cold drum equipment is reduced.

Benefits of technology

It effectively reduces the sulfide and thiocyanide content in the cooling circulation liquid of the pre-cooling tower, extends the service life of the cold drum equipment, reduces equipment corrosion, and improves the water quality of ammonia.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120272246A_ABST
    Figure CN120272246A_ABST
Patent Text Reader

Abstract

The invention discloses a coking plant gas desulfurization unit precooling tower liquid supplementing optimization system and a process thereof. The system comprises a cold drum unit, a desulfurization unit, an ammonia distillation unit, an ammonium sulfate unit and a benzene elution unit, the cold blowing unit comprises a gas-liquid separator, a primary cooler, an electrical tar precipitator and a coal gas blower which are communicated in sequence; the desulfurization unit comprises a precooling tower, a desulfurization tower and a regeneration tower which are communicated in sequence; the ammonia distillation unit comprises an ammonia water heat exchanger, an ammonia distillation tower, an ammonia dephlegmator and an ammonia cooler which are communicated in sequence; the ammonium sulfate unit comprises an ammonium sulfate saturator, a crystallization tank, an ammonium sulfate centrifugal machine, a drying fluidized bed and an ammonium sulfate storage hopper which are communicated in sequence; the benzene elution unit comprises a final cooler, a benzene washing tower, a rich oil pump, a rich oil intermediate tank, a rich oil intermediate pump, a lean and rich oil heat exchanger, a rich oil heater, a benzene removal tower, a vacuum pump, a condensation cooler, a gas-liquid separator and an oil-water separator which are communicated in sequence. The method has the advantage of effectively reducing corrosion to cold drum equipment and pipelines.
Need to check novelty before this filing date? Find Prior Art