Dry desulfurization system applied to cement waste heat boiler

By setting up a feeding device in the dry desulfurization system of cement waste heat boiler, the powdered desulfurizer fully reacts with the sulfur-containing substances in the flue gas, solving the problem of low desulfurization efficiency in the prior art, achieving an efficient and economical desulfurization effect, and meeting emission standards.

CN222658274UActive Publication Date: 2025-03-25ANHUI HAIXIN MINERALIZED MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202420620969.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-28
Publication Date
2025-03-25
Estimated Expiration
2034-03-28

AI Technical Summary

Technical Problem

The existing cement kiln dry desulfurization technology has low desulfurization efficiency, resulting in excessive SO2 emissions during cement production and inability to meet emission standards.

Method used

A dry desulfurization system applied to cement waste heat boilers is designed, including a preheater, a SCR denitrification reactor, a waste heat boiler and a humidification tower. By setting up a feeding device at the outlet of the waste heat boiler or the inlet of the humidification tower, the powdered desulfurization agent fully reacts with the sulfur-containing substance in the flue gas to achieve efficient desulfurization.

Benefits of technology

This system can significantly improve the desulfurization efficiency, so that the sulfur content of the treated flue gas is less than 35mg/Nm3, meet the emission standards, and reduce the use of desulfurization agents and reduce the cost of use.

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Abstract

The utility model discloses a dry desulfurization system applied to a cement waste heat boiler, which relates to the technical field of environmental protection and comprises a preheater, an SCR (selective catalytic reduction) denitration reactor, a waste heat boiler and a humidifying tower, a gas outlet of the preheater is connected with a gas inlet of the SCR denitration reactor, a gas outlet of the SCR denitration reactor is connected with an inlet of the waste heat boiler, and a gas outlet of the waste heat boiler is connected with a gas outlet of the humidifying tower. An outlet of the waste heat boiler is connected with an inlet of the humidifying tower, a high-temperature fan is arranged at an air outlet of the humidifying tower, and an air outlet of the high-temperature fan is connected with a chimney. According to the utility model, the selection temperature of a desulfurizing agent adding point is proper, the desulfurization efficiency is high, a powdery desulfurizing agent is conveyed by the adding device to react with a sulfur-containing substance, the device has the advantages of no corrosion, no condensation, no waste water and the like, and the distances between the two adding positions and the flue gas outlet are longer; the cement kiln is subjected to desulfurization treatment by adopting the method, and a better desulfurization effect can be obtained.
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