Cement kiln bypass ventilation and water washing potassium extraction coupling system

By coupling the cement kiln bypass ventilation with the water washing system and utilizing high-temperature flue gas desalination, the problems of equipment redundancy and high-temperature ash discharge are solved, the system is simplified and costs are reduced, and resource utilization efficiency is improved.

CN120667940APending Publication Date: 2025-09-19BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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Patent Information

Application Number
CN202510732216.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-03
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

The independent operation of the traditional cement kiln bypass ventilation system and the bypass ash washing system results in high equipment redundancy, large floor space, high infrastructure and operation and maintenance costs, and the discharge of high-temperature ash increases system heat consumption and reduces production.

Method used

The bypass ventilation system is coupled with the water washing system. Through the combination of decomposition furnace, heat exchanger, dust collector and washing tower, high-temperature flue gas desalination is achieved. Sodium chloride and potassium chloride remain in gaseous state and enter the washing tower for spray water washing, which simplifies system equipment and reduces heat consumption.

Benefits of technology

The system equipment is simplified, the floor space and operation and maintenance costs are reduced, while the infrastructure and operation costs are reduced, and the deep desalination of flue gas and the resource utilization of ash are achieved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of cement kiln ash treatment, and provides a cement kiln bypass ventilation and water washing potassium extraction coupling system which comprises a decomposing furnace, a heat exchanger, a dust remover and a washing tower. The heat exchange temperature of the heat exchanger is higher than the condensation temperature of sodium chloride and potassium chloride. An inlet of the deduster is connected with an outlet of the heat exchanger. An outlet of the dust remover is connected with an inlet of the washing tower. Through the structural arrangement, bypass ventilation and bypass water washing are coupled, high-temperature heat exchange is carried out in the heat exchanger, the temperature of flue gas is made to be higher than the condensation temperature of sodium chloride and potassium chloride, dust in the high-temperature flue gas is removed through the dust remover, and the flue gas enters the kiln again. Furthermore, the chloride ions can be kept in a gaseous state and enter the washing tower along with the flue gas for spraying, washing, desalting and purifying the flue gas. Therefore, system equipment can be simplified, the occupied area of the system is reduced, the energy consumption of the system is reduced, and the capital construction and operation and maintenance cost can be reduced.
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