Settled ash conveying system and method

Abstract

The invention discloses a settled ash conveying system and method. According to the settled ash conveying system and method, fly ash generated after combustion of a boiler reaches an economizer alongwith the flowing direction of smoke and is separated in a settled ash hopper, an inlet closing door is arranged at an inlet of a settled ash bin, and when equipment goes wrong and needs to be overhauled, related equipment can be isolated, so that overhauling is facilitated. The height of the settled ash hopper in the vertical direction is far larger than the height of the joint of the system and adry slag machine and the height of the joint of the system and a dry slag machine steel belt, and the purpose of ash conveying can be achieved through the gravity of settled ash. The dry slag machineand the dry slag machine steel belt communicate with a boiler cold ash hopper, negative pressure exists at the position, the suction effect on the settled ash falling to the position can be achieved,and the fluidity of the settled ash is enhanced. According to the boiler load and the coal ash content condition, part of the system is selectively isolated through the inlet closing door, and the operation mode is flexible and changeable.

Description

technical field [0001] The invention belongs to the field of dust-fall transportation, and in particular relates to a system and method for transportation of settled ash. Background technique [0002] At present, the flue gas from the economizer to the denitrification device or the air preheater in coal-fired power plants has the problem of a sharp change in the direction of the flue gas flow. Wear and tear, etc., the flue gas should be pretreated to reduce damage to subsequent equipment. At present, the main method is to install a settling ash hopper at the lower part of the flue economizer in the tail shaft, and use the change of the flue gas flow direction to separate the large particle fly ash in the flue gas by its own gravity and centrifugal force, and settle down in the settling ash hopper. Small particles of fly ash reach the follow-up equipment to achieve the purpose of separating the fly ash into fine and fine particles, which has a certain effect on the follow-up...

AI Technical Summary

Problems solved by technology

Due to the complexity of the pipeline, ash plugging often occurs, the maintenance and repair of equipment have increased significantly, and at the same time, the power consumption has increased

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