Desulfurized waste liquor recycling system

Abstract

The invention relates to a desulfurized waste liquor recycling system which is suitable for recycling desulfurized waste liquor of large- and medium-sized industry. The system comprises a bucket, a limestone slurry pond, a waste liquor pond, a replacing pond, a settling pond, a recycling pond, a buffer tank, a vacuum belt dehydrator and a filter cake outward transport device. Quick lime is chargedthrough a feeding bucket of a charging pipe; a liquid inlet pipe of a limestone slurry pump is connected to the limestone slurry pond through a pipeline, and a liquid outlet pipe of the limestone slurry pump is connected to the replacing pond; a liquid inlet pipe of a desulfurized waste liquor pump is connected to the waste liquor pond through a pipeline, a liquid outlet of the desulfurized wasteliquor pump is connected to the upper part of the replacing pond through a pipeline, and a desulfurized waste liquor inlet is formed in the top of the waste liquor pond; a gypsum slurry and sodium hydroxide mixed solution is filtered by a filter plate in the settling pond, gypsum slurry is left on the upper part of the filter plate, and the sodium hydroxide aqueous solution is discharged to the recycling pond; a slurry pump I pumps the gypsum slurry in the buffer tank from the settling pond; and a slurry pump II pumps the gypsum slurry to the vacuum belt dehydrator to be dehydrated to a gypsum filter cake.

Description

technical field [0001] The invention relates to a desulfurization waste liquid recycling system, which is suitable for large and medium-sized industrial desulfurization waste liquid recycling. Background technique [0002] Existing desulfurization technologies often use soda ash as the main desulfurizer, together with caustic soda and other alkaline solutions to adjust the pH value, but the high price of soda ash will undoubtedly increase the cost of desulfurization; at the same time, the desulfurization waste liquid circulation pool is often shared with the waste liquid pool, resulting in technical The requirements are high, the operation is cumbersome, the quality of the circulating fluid is often low, and it is difficult to recycle. Contents of the invention [0003] The object of the present invention is to address the above disadvantages and provide a recycling system for desulfurization waste liquid, which is compact in structure, easy to operate, and high in quality...

AI Technical Summary

Problems solved by technology

[0002] Existing desulfurization technologies often use soda ash as the main desulfurizer, together with caustic soda and other alkaline solutions to adjust the pH value, but the high price of soda ash will undoubtedly increase the cost of desulfurization; at the same time, the desulfurization waste liquid circulation pool is often shared with the waste liquid pool, resulting in technical The requirements are high, the operation is cumbersome, the quality of the circulating fluid is often low, and it is difficult to recycle

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