Oil refinery heating furnace smoke desulfurization induced draft fan PLC variable frequency speed adjusting control system

Abstract

The invention relates to an oil refinery heating furnace smoke desulfurization induced draft fan PLC variable frequency speed adjusting control system. The oil refinery heating furnace smoke desulfurization induced draft fan PLC variable frequency speed adjusting control system comprises a chimney and a smoke pipe; a pressure transducer, an inlet electric butterfly valve, a desulfurization deviceand a desulfurization induced draft fan are arranged on the smoke pipe in sequence; an outlet of the desulfurization induced draft fan is connected to the chimney through a pipe; the desulfurization induced draft fan is connected with a motor; the motor is connected with a frequency converter; the frequency converter receives control signals of a PLC control system; the inlet electric butterfly valve and the PLC control system are in two-way communication; the pressure transducer sends pressure signals to the PLC control system; and the PLC control system is connected with an industrial personal computer. The oil refinery heating furnace smoke desulfurization induced draft fan PLC variable frequency speed adjusting control system improves the working efficiency, guarantees the production safety, reliability and efficiency, meanwhile, controls the investment cost within lower limit, controls the flue pressure more precisely after transformation, and is safe, reliable, advanced in technology, economical, practical, complete in function and easy to maintain.

Description

technical field [0001] The invention relates to a fan control system, in particular to a PLC frequency conversion speed regulation control system for a heating furnace flue gas desulfurization induced draft fan in an oil refinery. Background technique [0002] The exhaust gas volume adjustment of the flue gas desulfurization induced draft fan in the crude oil plant of the refinery when the heating furnace is switched is controlled by manually observing the pressure in the flue, and manually adjusting the opening of the electric valve in the valve control box according to the change of the flue pressure. When the furnace is working, the operation of the flue gas desulfurization system needs to be adjusted by two people. When the two heating furnaces are working, the exhaust gas volume cannot be adjusted manually, which will cause serious pollution to the atmosphere. Contents of the invention [0003] In order to solve the above problems, the present invention provides a PLC...

AI Technical Summary

Problems solved by technology

[0002] The exhaust gas volume adjustment of the flue gas desulfurization induced draft fan in the crude oil plant of the refinery when the heating furnace is switched is controlled by manually observing the pressure in the flue, and manually adjusting the opening of the electric valve in the valve control box according to the change of the flue pressure. When the furnace is working, the operation of the flue gas desulfurization system needs to be adjusted by two people. When the two heating furnaces are working, the exhaust gas volume cannot be adjusted manually, which will cause serious pollution to the atmosphere.

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