Coal ash separation device

Abstract

The invention discloses a coal ash separation device, and belongs to the technical field of coal ash separation. The coal ash separation device comprises a raw ash inlet pipe, a volute, fine ash outlet pipes, an inner cylinder, a coarse ash outlet pipe, a flow cutting plate and a flow guide plate. The raw ash inlet pipe is arranged in the tangential direction of the volute, and the coarse ash outlet pipe is arranged on the lower portion of the volute and connected to a coarse ash storage device; the inner cylinder is concentrically arranged in the volute, a fine ash inlet is formed in the wall of the inner cylinder in the axis direction, two ends of the inner cylinder are each connected with a fine ash outlet pipe, the fine ash outlet pipes are connected to a fine ash storage device, each fine ash outlet pipe is connected with a negative pressure pipe, and the negative pressure pipes are connected to a negative pressure delivery system; and the flow cutting plate and the flow guide plate are movably arranged on the inner walls of the volute on two sides of the coarse ash outlet pipe. The coal ash separation device does not need an external power source, has no dust leakage, has small abrasion, and is free of blocking; the coal ash separation device can adapt to raw ash of different grades and meet the requirements of various fine ash grades; and the separation proportion of coarse and fine ash and the yield and quality of the coarse ash can be adjusted in real time, to meet the requirements of different working conditions.

Description

technical field [0001] The invention belongs to the technical field of fly ash separation, and in particular relates to a fly ash separation device. Background technique [0002] Before the fly ash produced by the combustion of coal-fired power plants is not separated according to particle size, the traditional disposal method is to landfill, and the surface is solidified according to the requirements of environmental protection regulations to prevent pollution caused by loss, or it is used as a roadbed material for landfill. Its economic value is difficult to play. After the fly ash is separated according to the particle size, the fine ash is one of the raw materials for the production of cement, and its economic value is greatly increased. Among them, the first-grade fine ash can be directly supplied to the concrete mixing plant as high-grade concrete raw material, which can improve the fluidity of concrete; the second-grade fine ash can be used as foundation cement raw m...

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Problems solved by technology

[0004] In order to solve the above problems, the object of the present invention is to provide a fly ash separation device, which does not need an external power supply, operates in a negative pressure state, has no dust leakage, and does not cause environmental pollution; adopts low-speed dilute phase separation, and has little wear and tear. No clogging; it can adapt to raw ash of different tastes and meet the requirements of various fine ash tastes; and it can adjust the separation ratio of coarse and fine ash and the output and quality of coarse ash in real time to meet the needs of different working conditions

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