Evaporation and concentration system for calcium chloride solution

By designing a calcium chloride solution evaporation and concentration system including a multi-stage preheater, evaporator, separator, neutralization tower and steam compressor, the equipment corrosion problem caused by a strong acidic environment during the evaporation and concentration of the calcium chloride solution is solved, and the long-term stable operation and environmental protection goals of the system are achieved.

CN119656607APending Publication Date: 2025-03-21HUANENG CLEAN ENERGY RES INST +2
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Patent Information

Application Number
CN202411993088.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

During the evaporation and concentration of calcium chloride solution, due to the increase in calcium chloride concentration in the solution, it leads to a strong acidic environment, causing equipment corrosion, affecting system stability and product quality.

Method used

A calcium chloride solution evaporation and concentration system is designed, including a multi-stage preheater, an evaporator, a separator, a neutralization tower and a steam compressor. The solution temperature is increased by multi-stage preheating, the evaporator uses corrosion-resistant materials, the separator separates the concentrate and secondary steam, and the neutralizing tower sprays alkali to purify the secondary steam, and the steam compressor compresses and heats up the secondary steam for reuse.

Benefits of technology

Effectively respond to the corrosion problems caused by strong acidic environments, ensure long-term and stable operation of the system, reduce maintenance costs and environmental risks, and improve thermal efficiency and equipment stability.

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Abstract

The invention discloses a calcium chloride solution evaporation and concentration system, the calcium chloride solution evaporation and concentration system comprises a multi-stage preheater, an evaporator, a separator, a neutralizing tower and a vapor compressor, the multi-stage preheater is used for preheating a solution to be concentrated, the evaporator is connected with the multi-stage preheater, so that the preheated solution is heated and evaporated through the evaporator; the separator is connected with the evaporator, so that a concentrated solution and secondary steam are separated from the heated and evaporated solution through the separator, the neutralizing tower is connected with the separator, so that the secondary steam is subjected to alkali spraying purification through the neutralizing tower, and the steam compressor is connected with the neutralizing tower, so that the purified secondary steam is compressed and heated through the steam compressor; and the steam compressor is also connected with the evaporator, so that the compressed and heated secondary steam is fed into the evaporator to heat the evaporated and preheated solution. According to the system, the corrosion problem caused by the strong acid environment can be effectively solved, long-term stable operation of the system is ensured, and meanwhile the maintenance cost and the environmental protection risk are reduced.
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