Device for measuring slurry spraying intensity of wet desulfurization tower, and measuring method

Abstract

The invention discloses a device for measuring slurry spraying intensity of a wet desulfurization tower. The device includes a spraying intensity probe, a temperature signal collection device, a spraying intensity diagnostic device and an electric heating control device; the spraying intensity probe is a hollow structure with an opening on one end, the outer side of the spraying intensity probe isprovided with a spraying probe shell, a cavity is arranged in the spraying probe shell, a tail end cover is arranged on the opening of the spraying intensity probe, the cavity is provided with a temperature measuring element which is in contact with the inner wall of the cavity and also provided with a heating wire, and the heating wire is arranged along the axial direction of the cavity and notin contact with the temperature measuring element; the input end of the temperature signal collection device is connected to the temperature measuring element through a temperature measuring element lead wire, and the output end of the temperature signal collection device is provided with two branches; the spraying intensity diagnostic device is connected to one branch of the output end of the temperature signal collection device; and the electric heating control device is connected to the other branch of the output end of the temperature signal collection device, and the other end of the electric heating control device is connected to the heating wire through an electric heating element lead wire.

Description

technical field [0001] The invention relates to the fields of flue gas purification and energy saving and emission reduction in coal-fired power plants, and in particular relates to a device and a measuring method for measuring the slurry spray intensity of a wet desulfurization tower. Background technique [0002] Large and medium-sized coal-fired power plants in my country generally use wet desulfurization technology to remove sulfur dioxide from flue gas. The wet desulfurization tower is equipped with multi-layer spray layers, and each layer of spray layer is equipped with hundreds of nozzles. The limestone-gypsum slurry is sprayed out from the nozzles and falls under the action of gravity, forming a countercurrent flow with the upward flue gas. Heat and mass transfer occur, and sulfur dioxide diffuses to the surface of the slurry droplet and reacts with the calcium carbonate in it to form calcium sulfite, which is oxidized and crystallized in the slurry pool to form gyps...

AI Technical Summary

Problems solved by technology

However, there are usually hundreds of nozzles in each spray layer of the desulfurization tower, and the flowmeter itself is relatively precise and expensive, so it is unrealistic to configure a flowmeter for each nozzle branch

For another example, through image recognition, it can be judged that a small number of nozzles near the video monitoring probe are blocked, but the spatial density of slurry droplets in the desulfurization tower is very high, resulting in low visibility. Therefore, image recognition is helpless for nozzles that are a little farther away

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