Pulverized coal preparation system and method with air-blew pulverized coal heat measurement and control functions

Abstract

The invention discloses a pulverized coal preparation system and method with air-blew pulverized coal heat measurement and control functions. The system comprises a heat coal supply system, an air-blew pulverized coal weighing meter, an air speed adjusting controller and a data processing controller; the heat coal supply system is used for supplying coal for a coal pulverizing machine and performing measurement and raw coal heat control on raw coal heat Qadi coal, moisture Madi coal and weight Wi coal; the air-blew pulverized coal weighing meter is used for weighing Wi pulverized coal of the air-blew pulverized coal; the air speed adjusting controller is installed on an air conveying pipeline of a fan and is used for adjusting the air speed to adjust the Wi pulverized coal of the air-blew pulverized coal fed into an air-blew pulverized coal pipeline; the data processing controller receives the Qadi coal, the Madi coal, the Wi coal and the Wi pulverized coal, calculating the heat Qdi pulverized coal and heat Ji pulverized coal conveyed by the coal pulverizing machine. The data processing controller sends control signals to the air speed adjusting controller according to a difference deta of the Ji pulverized coal to adjust the air speed, the Ji pulverized coal is closer to J control pulverized coal, and the air-blew pulverized coal heat enclosure control is implemented.

Description

technical field [0001] The invention relates to coal powder preparation technology, in particular to a coal powder preparation system and method with heat measurement and control of wind-blown coal powder. Background technique [0002] Coal-fired boilers, especially large-scale coal-fired boilers, such as electric boilers, industrial boilers, cement kilns, etc., all use pulverized coal preparation systems to make pulverized coal as the source of coal for boilers. [0003] The existing pulverized coal preparation system has two types: direct blowing type and storage type. [0004] Such as Figure 1A Shown is a schematic diagram of the structure of the direct-blowing pulverized coal preparation system. Such as Figure 1B Shown is a schematic diagram of the storage system for pulverized coal preparation. [0005] The direct-blowing pulverized coal preparation system includes a raw coal silo 1, a feeder 2, a coal mill 3, a fan 4, a coarse and fine powder separator 5, an air p...

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Problems solved by technology

[0022] The technical problem to be solved by the present invention is to make the heat of pulverized coal into the furnace close to the heat required by the boiler, reduce the heat fluctuation of the boiler furnace, and avoid the waste of heat energy

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