Limestone pulping and long-distance conveying device and using method thereof

Abstract

The invention discloses a limestone pulping and long-distance conveying device and a using method thereof. The limestone pulping and long-distance conveying device comprises a water supplementing pipe, wherein an inlet of the water supplementing pipe is provided with a fifth valve, an outlet of the water supplementing pipe is communicated with the top of a pulp box, the inlet of the water supplementing pipe and a long-distance conveying pipe are communicated, the long-distance conveying pipe is close to a second valve and is arranged at the back of the second valve, an inlet of a pulp backflow pipe is communicated with another long-distance conveying pipe between a pulp pump and the second valve, and a water feeding pipe is communicated with another long-distance conveying pipe which is close to a third valve and arranged at the front of the third valve. The using method of the limestone pulping and long-distance conveying device comprises a water supplementing pulping step, a pulp conveying step and a back flushing step. The limestone pulping and long-distance conveying device and the using method thereof, disclosed by the invention, have the advantages of largely shortening the length of the pulp backflow pipe, reducing the lift of the pulp pump and the pavement difficulty of a device, saving construction and operation costs, being capable of quickly preparing limestone pulp and improving production efficiency.

Description

technical field [0001] The invention relates to a limestone pulping and long-distance conveying device and its application method. Background technique [0002] The limestone-gypsum wet flue gas desulfurization process is currently the most widely used desulfurization technology. Its principle is to use limestone powder to make a slurry as a desulfurization absorbent, which is mixed with the flue gas entering the absorption tower. The sulfur dioxide in the flue gas and Calcium carbonate in the slurry and the oxidizing air blown in chemically react to form gypsum. Among them, the preparation method of limestone slurry includes the pulping method of purchased limestone powder. The process is as follows: the limestone powder is transported to the factory area by ship or truck, and is pneumatically transported to the limestone powder warehouse for storage. The limestone powder is passed through an electric screw feeder. Enter the limestone slurry tank, mix with the pulping proc...

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Problems solved by technology

[0009] The above method of limestone slurry preparation and long-distance transportation needs to circulate the limestone slurry between the long-distance delivery pipe, the slurry return pipe and the slurry tank, while the slurry return pipe and the long-distance delivery pipe in the conventional limestone slurry making and delivery device The length of the limestone slurry is more than 500 meters, and the limestone slurry needs to be transported for more than 1,000 meters to complete a cycle, resulting in a long time-consuming preparation of limestone slurry and low production efficiency.

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