Control method for preheating and roasting processes during production of traveling grate machine

Abstract

A control method for preheating and roasting processes during the production of a traveling grate machine belongs to the technical field of the control of the pellet production through the traveling grate machine. The invention aims to provide a judgment and control method for preheating and roasting processes during the pellet production process via the traveling grate machine. The method comprises the following steps: carrying out regression fitting of the exhaust temperatures all bellows in a burner section and two bellows behind the burner by utilizing a least squares method so as to obtain a 6-time temperature curve, wherein the X-axis represents the positions of the detection points, and the Y-axis indicates the temperatures of the detection points; carrying out derivation for a curvilinear equation so as to obtain a slope equation, wherein the X-axis value of the maximal slope point is the preheating termination point which is the reference for the quantitative partition of the preheating and the roasting; and based on the obtained preheating termination point, automatically adjusting the rotational speed of a main induced-draft fan according to the set value of the preheating termination point so as to realize the automatic control of the preheating termination point. According to the invention, the pellet production through the traveling grate machine is stable and the pellet quality is improved.

Description

technical field [0001] The invention belongs to the technical field of belt roaster pellet production process control, and in particular provides a method for judging and controlling the two process sections of preheating and roasting, and realizes the preheating and roasting of the burner section in the roaster Reasonable distribution and control of the two key processes, and achieve the purpose of stabilizing production and increasing the quality of pellets. Background technique [0002] There are mainly three production methods of pellets in the world, including belt roaster, grate machine-rotary kiln-circular cooler and shaft furnace. Among them, the belt roasting machine is the most widely used method in the world. [0003] In the production process of belt roaster pellets, the most important process link is to complete the preheating and roasting process of the dried green pellets in the burner section; the significance of reasonable control of the preheating and roas...

AI Technical Summary

Problems solved by technology

[0004] At present, the common control method at home and abroad is to manually control the exhaust gas temperature of some key bellows by experience, so as to realize the forecast and control of the roasting process, lacking a reasonable quantitative control method

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