Wide-load regulation limestone slurry supply system and control method

A limestone slurry and supply system technology, applied in the field of desulfurization, can solve problems such as inability to meet production needs, achieve the effects of reducing wear, increasing service life, and reducing wear
CN112973429APending Publication Date: 2021-06-18DATANG ENVIRONMENT IND GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DATANG ENVIRONMENT IND GRP
Publication Date
2021-06-18

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Abstract

The invention relates to the technical field of desulfurization, in particular to a wide-load regulation limestone slurry supply system and a control method. The wide-load regulation limestone slurry supply system comprises a limestone slurry box, a filtrate water supply mechanism and a variable-frequency limestone slurry pump; and the limestone slurry box and the filtrate water supply mechanism separately communicate with an inlet of the variable-frequency limestone slurry pump in parallel, and an outlet of the variable-frequency limestone slurry pump communicates with an absorption tower. The variable-frequency limestone slurry pump does not need to continuously operate at high frequency, so that the service life of the variable-frequency limestone slurry pump is prolonged, and the equipment cost of a desulfurization system is reduced; and the water balance of the desulfurization system is adjusted by using filtrate water, so that the utilization rate of the filtrate water is improved, meanwhile, the self-balance of the desulfurization system is ensured, and the problem that an existing limestone slurry supply system cannot meet the production requirement under the wide-load working condition is solved.
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Description

technical field

[0001] The invention relates to the technical field of desulfurization, in particular to a supply system and control method for adjusting limestone slurry with wide load. Background technique

[0002] The limestone-gypsum wet desulfurization process is currently the most mature flue gas desulfurization technology, which has the advantages of high desulfurization efficiency, high operational reliability, adaptability to large-capacity units and comprehensive utilization of by-products. Therefore, this process is widely used in coal-fired power plants at home and abroad. It has been widely used in flue gas desulfurization projects. This technology uses limestone as absorbent, and SO in the flue gas 2 reacted by SO 2 Dissolution and Absorption, CaSO 3 Oxidation, CaSO 3 Neutralization, gypsum crystallization and other processes to produce by-product gypsum. In order to control the amount of limestone added, limestone powder and water are usually mixed in a c...

Claims

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