Device and method for cooling desulfurization slurry of thermal power plant

Abstract

The invention discloses a device and method for cooling desulfurization slurry of a thermal power plant. The device comprises a desulfurization tower, a desulfurization circulating pump, a slurry heatexchanger and an X-ray fluorescent sulfur determination instrument; one side of the desulfurization tower is provided with a smoke inlet pipe; the smoke inlet pipe is provided with a smoke inlet control valve; a sulfur content measuring and conveying pipe is arranged below the smoke inlet pipe; and the middle of the sulfur content measuring and conveying pipe is provided with a sulfur content measuring and conveying valve. The device has the beneficial effects that calcium hydroxide slurry added into a cooling and spraying layer can instantly finish an acid-base reaction with sulfur dioxide in smoke, so that the desulfurization efficiency is increased, and the deep desulfurization operation for the smoke can be finished; meanwhile, due to the adoption of the slurry heat exchanger, all spot-welding processes are omitted and are changed into a surrounding welding process, so that the production cost can be greatly reduced; and due to the arrangement of the X-ray fluorescent sulfur determination instrument, the content of sulfur in the slurry can be precisely detected at fixed time, and thus, precise data reference is provided for slurry replacement.

Description

technical field [0001] The invention relates to the technical field of sulfur slurry cooling devices, in particular to a device and method for cooling desulfurization slurry in thermal power plants. Background technique [0002] According to the national air pollution prevention and control plan, the environmental protection policies of some provinces and cities require that the flue gas after desulfurization in thermal power plants be treated with cooling, dehumidification and whitening treatment. Heater cooling, but the cooling layer and desulfurization layer in the existing thermal power plant desulfurization slurry cooling device are concentrated, the desulfurization efficiency is relatively low, and deep desulfurization cannot be realized. At the same time, the size of the slurry heat exchanger is large and the investment is high. It is produced by an all-welding process, and the manufacturing cost is high. In addition, because there is no accurate sulfur content detect...

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Problems solved by technology

[0002] According to the national air pollution prevention and control plan, the environmental protection policies of some provinces and cities require that the flue gas after desulfurization in thermal power plants be treated with cooling, dehumidification and whitening treatment. Heater cooling, but the cooling layer and desulfurization layer in the existing thermal power plant desulfurization slurry cooling device are concentrated, the desulfurization efficiency is relatively low, and deep desulfurization cannot be realized. At the same time, the size of the slurry heat exchanger is large and the investment is high. It is produced by a full welding process, and the manufacturing cost is high. In addition, because there is no accurate sulfur content detector when the slurry is replaced, it cannot provide data reference for the replacement of the slurry.

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