High-temperature flue gas desulfurization, dust removal and waste heat recovery self-balancing system

Abstract

The invention discloses a high-temperature flue gas desulfurization, dust removal and waste heat recovery self-balancing system which comprises an absorption tower, a first-stage sprayer, a first heatexchanger, a first circulation loop, a second-stage sprayer, a second heat exchanger and a second circulation loop; a solution in the first circulation loop exchanges heat with heating water in the first heat exchanger; the second circulation loop extends out of a second solution outlet and extends into the second-stage sprayer; and a solution in the second circulation loop exchanges heat with cooling water in the second heat exchanger. The system is suitable for the integration of desulfurization, dust removal and waste heat recovery of high-temperature flue gas, meanwhile, can realize hot and wet flue gas desulfurization, dust removal purification and waste heat recovery; the system has multiple purposes; a solution spraying method and a double-layer heat exchange system are adopted, sothat the concentration and the liquid level of circulating liquid are kept in a balanced state, the requirement that conventional desulfurization needs water supplementation is met, and waste heat recovery and a desulfurization and dust removal cooperative treatment effect are realized.

Description

technical field [0001] The invention relates to a self-balancing system for desulfurization and dust removal of high-temperature flue gas and waste heat recovery. Background technique [0002] At present, most of the flue gas at the tail of coal-fired boilers has undergone relevant desulfurization, dust removal, and waste heat recovery transformations. However, with the improvement of environmental protection indicators, the existing flue gas sulfide and dust content cannot meet the emission requirements. The sulfur content and dust content have been preliminarily removed and controlled. Adding desulfurization equipment or dust removal equipment will greatly increase the economic pressure of the enterprise, and the slurry cooling technology that came into being will cause the water balance of the desulfurization tower to be unbalanced, and in severe cases, the desulfurization process will be damaged. cannot proceed normally. Contents of the invention [0003] The technica...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a self-balancing system for high-temperature flue gas desulfurization, dust removal and waste heat recovery in order to overcome the defects in the prior art that the balance control of desulfurization water, waste heat utilization, desulfurization and dust removal are difficult to coordinate

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