★ Equipment Overview
Introduction to Shaanxi Boiler Control Steam boilers are chain-fired coal-fired water tube boilers. The boiler room system is mainly composed of boiler water supply system, combustion system and auxiliary system. The water supply system is mainly composed of water treatment equipment, softened water tank, boiler feed pump, water flow meter, feed water electric regulating valve, boiler drum water level, steam flow meter, steam pressure, and sub-cylinder. The combustion system consists of bucket elevator , Fixed belt
Conveyor, grate governor, slag remover, economizer, air preheater, dust collector, blower, induced draft fan, chimney, etc .:
The auxiliary system consists of a deaerator, a continuous blowdown expander, a regular blowdown expander, and a water-water heat exchanger.
★ Main Control Points
Boiler equipment is a complex control object. The main input variables are boiler water supply, fuel, air supply, and induced air volume. The main output variables are drum water level, steam pressure, furnace negative pressure, and excess air (oxygen content, etc.). .
★ Chain protection function
1. Boiler limit water level interlock protection function.
2. The slag ejector is interlocked with the boiler grate governor.
3. Induced fan and blower interlock.
4. Induced fan frequency conversion cabinet, blower frequency conversion cabinet, boiler feed pump step-down startup cabinet have two control functions.
5. The boiler has extremely high water level, and the high water level alarm.
6, the boiler has extremely f's water level, low water level alarm.
7. The boiler adopts a pressure controller and has an over-pressure alarm function.
8, high temperature alarm function of the economizer outlet.
Keywords in this article: