Slurry recycling method of circulating water bypass flow system

Abstract

The invention discloses a slurry recycling method for a circulating water bypass flow system. Based on a water collecting pit, a simple trough, a stirrer and a limestone slurry box, the method comprises the following steps: 1, digging the water collecting pit, and arranging the simple trough above the water collecting pit; 2, directly conveying the sludge discharged by a dehydrator to a desulfurization slurrying area through a transport vehicle, and putting the sludge into the water collecting pit through the simple trough; 3, stirring the mud poured into the water collecting pit by adopting stirring equipment, and adding water at the same time to prepare slurry; 4, putting a slurry pump into the water collecting pit, and pumping the slurry into a limestone slurry box through the slurry pump to be stored; and 5, after the slurry liquid is conveyed, reversely flushing the pipeline to avoid blockage. By optimizing and transforming the existing system of a thermal power plant, the production waste-mud of the circulating water bypass flow treatment system is recycled to the desulfurization production process to be used as a desulfurizing agent, the waste is reused, and high economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of desulfurization mud treatment, in particular to a method for reusing mud in a circulating water bypass system. Background technique [0002] In thermal power plants, the circulating water side-flow treatment system is mostly used, and the high-density sedimentation tank is added to the lime treatment process. The main additive is slaked lime (calcium hydroxide) with a purity of 90% and a fineness of 325 mesh. The added slaked lime removes the temporary hardness in the circulating water. After the lime is softened, the sludge is dehydrated by a dehydrator to form a mud cake, which is transported and stored by car. This treatment method requires a large investment and high operating costs. According to the "Technical Regulations for Chemical Design of Thermal Power Plants", the amount of water treated by the side stream should be controlled within the range of 1% to 5% of the circulating water volume. The a...

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Problems solved by technology

At present, all the sludge produced is sent to the circular coal yard for blending treatment. Due to the high viscosity of the sludge, it is easy to cause blockage of the coal drop pipe, and at the same time, it adheres to the inside of the activated coal feeder, causing the activated coal feeder to vibrate, and the spring Fracture, affecting the safe and stable operation of the coal transportation system