Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof

Abstract

The invention relates to a direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and a method thereof. The direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system comprises a direct blowing type double-inlet and double-outlet steel ball coal mill, a primary air system and a main boiler control system, wherein the primary air system is mainly formed by a primary air fan provided with a movable vane, an air preheating device, a control damper, an air pipe and the like. According to the method, the volume air control damper is manually adjusted to be entirely open in the normal state, the opening degree of the volume air control damper is manually adjusted during the upward and downward loading, the pressure of a main pipe of the volume air control damper is not adjusted by the primary air fan, and the frequency of a frequency converter of the primary air fan or the opening degree of the movable vane is directly controlled by the main boiler control system so as to adjust the volume of the air entering into a hearth. According to the method provided by the invention, the volume air control damper is entirely opened, and proper pressure of the main pipe of the primary air fan, namely the force directly acting on the primary air fan by the main boiler control system, is directly calculated by the main boiler control system according to the required hearth power, so that the throttling loss of the volume air control damper is greatly reduced. Moreover, the direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system is rapid in response time, thereby enhancing the adjustment quality of a machine set.

Description

technical field [0001] The invention relates to a direct-blown double-inlet and double-outlet steel ball mill energy-saving optimization system and method thereof. Background technique [0002] The thermal power plant has a pulverizing system, the purpose of which is to send coal powder into the furnace of the boiler. Coal is ground into powder and coal powder is fed into the furnace at the same time) Different types, because the medium storage type occupies a relatively large area, it is currently used less, and the direct blowing type is used in large quantities because of its small footprint, and the direct blowing type is used because of the pulverization The different methods are divided into medium-speed bowl mill, medium-speed vertical mill and steel ball mill. Because the steel ball mill is suitable for a wide range of coal types, it can be applied to various coal types, and there is no pebble coal system that is widely used in power plants with poor coal quality. F...

AI Technical Summary

Problems solved by technology

The primary fan is equipped with a frequency converter or the opening of the movable blade to adjust, and the capacity wind of the mill adjusts the air door to adjust the amount of powder entering the furnace, and the primary fan, whether it is a movable blade or a frequency conversion, adjusts the pressure of the main pipe. When the load is increased, the capacity air is adjusted When the damper is opened large, the pressure of the main pipe decreases, and the output of the primary fan increases. When the load is reduced, the opposite is true. Therefore, the capacity wind adjustment damper cannot be fully opened, and the throttling loss is very large.

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