Coal grinding device for efficient hot water boiler

Abstract

The invention discloses a coal grinding device for an efficient hot water boiler. The coal grinding device comprises a primary coal crushing box, a fine coal grinding box, a coal conveying pipe, a coal inlet pipe and a coal outlet hopper; the bottom end of the primary coal crushing box is arranged at the top end of the fine coal grinding box through the coal conveying pipe; the coal inlet pipe is arranged at the top end of the primary coal crushing box; the coal outlet hopper is arranged at the bottom end of the fine coal grinding box; left and right two rotary beating devices are arranged in the primary coal crushing box; the rotary beating devices consist of rotating motors, rotating shafts and multiple beating rollers; the rotating motors are arranged on the top surface of the primary coal crushing box, and are connected with the rotating shafts in the primary coal crushing box; the multiple beating rollers are arranged on the left and right two sides of the rotating shafts; upper and lower two rows of drum coal pulverizing devices are arranged in the fine coal grinding box; and each row of drum coal pulverizing devices consists of left and right two circular grinding wheels. The coal grinding device for the efficient hot water boiler, provided by the invention, is higher in coal grinding efficiency, smaller in equipment size, lower in power consumption and better in coal grinding fineness.

Description

technical field [0001] The invention relates to a coal grinding device for a boiler in a thermal power plant, in particular to a coal grinding device for a high-efficiency hot water boiler. Background technique [0002] A coal mill is a machine that breaks coal and grinds it into coal powder. It is an important auxiliary equipment for pulverized coal furnaces. The coal grinding process is the process in which coal is broken and its surface area is continuously increased. To add new surface area, the bonding forces between solid molecules must be overcome, thus expending energy. [0003] Coal is ground into pulverized coal in a coal mill, mainly through crushing, crushing and grinding. Among them, the crushing process consumes the least energy. The grinding process is the most energy-intensive. All kinds of coal mills have the above two or three methods in the pulverization process, but which one is the main one depends on the type of coal mill. [0004] The coal ...

AI Technical Summary

Problems solved by technology

[0004]The coal mills currently on the market mainly have problems such as low coal grinding efficiency, large equipment volume, high power consumption, and poor coal fineness

Images