Dual-effect purification system for integrated treatment of coking flue gas and ammonia-containing wastewater

Abstract

The invention discloses a dual-effect purification system for the integrated treatment of coking flue gas and ammonia-containing wastewater, including a desulfurization and denitrification tower and an ammonia distillation tower. The lower part of the ammonia distillation tower is connected to the pipeline in the flue gas reboiler, the desulfurization and denitrification tower is connected to the flue gas reheater, the desulfurization and denitrification tower is connected to the ammonia distillation tower, and the ammonia distillation tower, the shrinker and the total condenser are connected in sequence , the bottom of the total condenser is connected with the ammonia water reflux tank, the ammonia water reflux tank is connected with the desulfurization and denitrification tower, the upper part of the desulfurization and denitrification tower is provided with an ammonia water spraying structure, and the circulating pump is respectively connected with the bottom of the desulfurization and denitrification tower and the ammonia water spraying structure. Desulfurization and purification of flue gas at source, deammonization and purification of wastewater by using waste heat of flue gas, use of waste resources in the coking process, waste treatment with waste, low cost, reduce vapor phase ammonia escape, use distilled concentrated ammonia water to adjust the pH of desulfurization liquid Value, realize the controllable implementation of desulfurization and denitrification, and significantly improve the purification effect.

Description

technical field [0001] The invention relates to the technical field of coking flue gas utilization and ammonia-containing wastewater treatment equipment, in particular to a double-effect purification system for the integrated treatment of coking flue gas and ammonia-containing wastewater. Background technique [0002] In the prior art, there are many methods for the desulfurization and denitrification treatment of coking flue gas and the treatment of ammonia-containing wastewater, in order to achieve the purpose of energy reuse, reduce energy consumption, and reduce environmental pollution and damage, but these methods in the prior art and The defects of the device are: some flue gas desulfurization and denitrification methods in the prior art have high cost, such as the high temperature method and catalytic denitrification method in the prior art; Well, at the same time, there is a lot of vapor-phase ammonia escape, which will pollute the environment and the atmosphere. ...

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Problems solved by technology

[0002] In the prior art, there are many methods for the desulfurization and denitrification treatment of coking flue gas and the treatment of ammonia-containing wastewater, in order to achieve the purpose of energy reuse, reduce energy consumption, and reduce environmental pollution and damage, but these methods in the prior art and The defects of the device are: some flue gas desulfurization and denitrification methods in the prior art have high cost, such as the high temperature method and catalytic denitrification method in the prior art; Well, at the same time, there is a lot of ammonia escape in the vapor phase, which will pollute the environment and the atmosphere

However, the disadvantages of this method and other methods in the prior art are that the high temperature method and the catalytic denitrification method are relatively expensive, and the desulfurization and denitrification effect of the traditional ammonia method is poor, and there are more vapor phases in the desulfurization and denitrification process. Ammonia slip

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