Two-stage evaporation and concentration device for sodium hydrosulfide-containing solution

By using a two-stage evaporation and concentration unit with an intermediate tank and a stirring device, the efficient concentration and separation of sodium hydrosulfide solution is achieved. This solves the problems of separation effect and equipment lifespan of single-stage units, reduces corrosion resistance requirements, and improves production stability and equipment lifespan.

CN223683050UActive Publication Date: 2025-12-19JIANGYIN JIANGZHONG EQUIP MFG
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Patent Information

Application Number
CN202423261248.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-12-19
Estimated Expiration
2034-12-27

AI Technical Summary

Technical Problem

Existing single-stage evaporation and concentration devices have limited separation efficiency, are difficult to adapt to materials of different concentrations, have short equipment lifespans, require high corrosion resistance, and their use at high temperatures increases the corrosiveness of sodium hydrosulfide solution, thus reducing separation efficiency.

Method used

A two-stage evaporation and concentration unit is adopted, including an intermediate tank and two evaporation and concentration components. Forced flow is achieved through a circulation pump. Combined with a stirring device and a preheating unit, the heating and condensation processes are optimized, and evaporation and concentration are carried out in stages.

Benefits of technology

It improves concentration efficiency, optimizes energy utilization, enhances separation performance, extends equipment life, reduces equipment load and material corrosion resistance requirements, and meets the needs of products with different concentrations.

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Abstract

The utility model discloses a two-stage evaporation and concentration device for a sodium hydrosulfide-containing solution, which comprises an intermediate tank provided with a buffer inlet, a buffer outlet, a heat preservation steam inlet and a heat preservation liquid outlet; the two evaporation and concentration assemblies are respectively arranged on the feeding side and the discharging side of the intermediate tank, and each evaporation and concentration assembly comprises a feeding pump; the heating concentration unit comprises a heater, a separator and a circulating pump; a discharge pump; a live steam treatment unit; and a secondary steam treatment unit. According to the two-stage evaporation and concentration device for the sodium hydrosulfide-containing solution, the two evaporation and concentration assemblies are adopted for sequentially carrying out evaporation and concentration, the separation effect is improved, the operation conditions can be flexibly adjusted to meet the requirements of products with different concentrations, the equipment load can be shared together, the service life is prolonged, the maintenance cost is reduced, and equipment operation is more stable and reliable; the requirement of the device on the corrosion resistance of materials is reduced, and the intermediate tank avoids the situation that the fluidity is reduced due to material cooling through heat preservation.
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