Coal mill outlet temperature control system and method based on pulverized coal fineness online adjustment

A technology of outlet temperature and fineness of pulverized coal, applied in grain processing and other directions, can solve the problems of conservative control method of coal mill outlet temperature, large safety margin, blindness, etc.

Pending Publication Date: 2019-01-11
GUODIAN LONGYUAN ENERGY SAVING TECH
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Problems solved by technology

This method of controlling the outlet temperature of the coal mill commonly used in unit operati

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  • Coal mill outlet temperature control system and method based on pulverized coal fineness online adjustment
  • Coal mill outlet temperature control system and method based on pulverized coal fineness online adjustment
  • Coal mill outlet temperature control system and method based on pulverized coal fineness online adjustment

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[0042] The present invention will be described in detail below with reference to the accompanying drawings and examples. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, those skilled in the art will recognize that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention includes such modifications and variations as come within the scope of the appended claims and their equivalents.

[0043] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orienta...

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Abstract

The invention provides a coal mill outlet temperature control system based on pulverized coal fineness online adjustment and provides a coal mill outlet temperature control method based on pulverizedcoal fineness online adjustment on the basis of the control system. The coal mill outlet temperature control system comprises a dynamic separator rotating speed measuring device, a coal quality analyzer, outlet temperature measuring devices, a damper adjusting device and a PID adjuster. The coal mill outlet temperature control system has the following control principles that the dynamic separatorrotating speed, the coal quality and the outlet temperature are measured by the dynamic separator rotating speed measuring device, the coal quality analyzer and the coal mill outlet temperature measuring devices, and dynamic separator rotating speed parameters, coal quality parameters and outlet temperature parameters are obtained to serve as control parameters to be sent to the PID adjuster; andthe PID adjuster adjusts a hot air adjusting damper, a cold air adjusting damper and a primary air adjusting damper according to coal quantity values obtained by a coal quantity measuring device, andthus the coal mill outlet temperature is stabilized at the set target temperature. Therefore, the coal mill outlet temperature control system based on the pulverized coal fineness online adjustment ishigh in control precision, and the control method is flexible.

Description

technical field [0001] The present invention relates to the technical field of thermal power generation equipment, and more specifically relates to a coal mill outlet temperature control system based on online adjustment of coal fineness and a coal mill outlet temperature control system based on online adjustment of coal fineness method. Background technique [0002] Combusting pulverized coal is an important means for large thermal power plants to improve coal burning efficiency, so the role of coal mills in general power plants is very important. The pulverized coal is ground with a coal mill. If the pulverized coal is directly injected into the combustion chamber, the temperature of the combustion chamber will change suddenly, which will affect the stability of combustion. Therefore, it is necessary to use hot air to heat up the pulverized coal. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of a typical coal mill outlet temperature control syst...

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Application Information

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IPC IPC(8): B02C25/00B02C23/00
CPCB02C23/00B02C25/00Y02B30/70
Inventor 王丙峰蒙涛赵虎军王连声
Owner GUODIAN LONGYUAN ENERGY SAVING TECH
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