Coal gasification black water circulation and black water waste heat recycling system

By using a multi-stage separation and purification system, combined with the use of black water heat exchangers and desalination chilled water, the problems of scaling and clogging in coal gasification black water and waste heat recovery have been solved, achieving efficient black water recycling and waste heat recovery, and reducing energy consumption and production costs.

CN224147767UActive Publication Date: 2026-04-21ZHEJIANG BALING HENGYI CAPROLACTAM
0 Cites 0 Cited by

Patent Information

Application Number
CN202520821861.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-27
Publication Date
2026-04-21
Estimated Expiration
2035-04-27

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively solve the scaling and clogging problem in coal gasification black water, making it impossible to recover and utilize waste heat, thus affecting system efficiency and safety.

Method used

A multi-stage separation and purification system is adopted, including equipment such as a syngas scrubbing tower, a high-pressure flash tank, a low-pressure flash tank, a black water heat exchanger, a vacuum flash tank, a settling tank, an ash water tank, a low-pressure flash steam lifter, and a high-pressure flash steam lifter. Through multi-stage gas-liquid separation and heat exchangers, waste heat from the black water is recovered, and desalination chilled water is used as a heat transfer medium to achieve the recycling of black water.

Benefits of technology

It achieves efficient purification of black water and waste heat recovery, solves the problem of scaling and clogging, reduces energy consumption, improves system efficiency, and realizes the recycling of water resources and economic benefits.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model relates to the technical field of coal chemical industry, in particular to a coal gasification black water circulation and black water waste heat recycling system. The coal gasification black water circulation and black water waste heat recycling system comprises a synthesis gas washing tower, a high-pressure flash tank, a low-pressure flash tank, a black water heat exchanger, a vacuum flash tank, a settling tank, a grey water tank, a low-pressure flash steam stripping tower and a high-pressure flash steam stripping tower. The coal gasification black water treated by the coal gasification black water circulation and black water waste heat recycling system disclosed by the utility model can be recycled as circulating water of a synthesis gas washing tower, so that the cyclic utilization of water resources is realized, the use of fresh water and the discharge of waste water are reduced, and the production cost and the environmental pressure are reduced. Meanwhile, the problem that a black water pipeline is scaled and blocked due to high temperature is solved, waste heat of the black water can be fully replaced for effective utilization, carbon is reduced, energy is saved, the purpose of cooling the black water is achieved, the cooling cost of a vacuum flash evaporation system is saved, and continuous and reliable economic benefits are created for enterprises.
Need to check novelty before this filing date? Find Prior Art