Gasification black water heat recovery system

By deeply coupling heat exchange between gasified black water and demineralized water, the problems of low heat utilization rate and high steam consumption of gasified black water are solved. This achieves deep coupling between the gasified black water system and the boiler demineralized water supply system, reduces circulating water consumption and steam usage, and improves resource utilization and system energy-saving effect.

CN224548119UActive Publication Date: 2026-07-24HENAN XINLIANXIN FERTILIZER
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Patent Information

Application Number
CN202521516181.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-18
Publication Date
2026-07-24
Estimated Expiration
2035-07-18

AI Technical Summary

Technical Problem

Existing technologies for gasifying black water have low heat utilization rates, make resource utilization difficult, and have high steam consumption in thermal deaerators.

Method used

By deeply coupling heat exchange between gasified black water and demineralized water, the gasified black water is used to preheat the demineralized water, and low-pressure steam is generated through a low-temperature deaerator and a hot water flash tank. The steam is then pressurized to 0.5MPa and used in a thermal deaerator, reducing steam consumption.

Benefits of technology

This system achieves deep integration between the gasification black water system and the boiler demineralized water supply system, reducing circulating water consumption and steam usage. Byproduct steam is used for thermal deoxygenation of the demineralized water, improving resource utilization and system energy efficiency.

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Abstract

The utility model belongs to a gasified black water heat recovery system. Comprising a gasified black water evaporation hot water tower, the gasified black water evaporation hot water tower is connected with an inlet of a clarifying tank through a vacuum flash tank, a desalted water pipeline is connected with a first channel inlet of a heat exchange unit through a desalted water pump and a conversion desalted water preheater, and a first channel outlet of the heat exchange unit is connected with an inlet of a thermal deaerator; the black water evaporation hot water tower is connected with an inlet of the vacuum flash tank through a second channel of the heat exchange unit; the method has the advantages that the process design is reasonable, the deep coupling of the gasification black water system and the boiler desalted water supply system is realized, the energy is saved, the consumption is reduced, the use amount of circulating water is reduced, the byproduct steam can be produced, and the byproduct steam is used for carrying out thermal deoxidization on desalted water, so that the use amount of purchased steam is reduced.
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