Ignition control system of tube furnace

Abstract

The invention relates to an ignition control system of a tube furnace. The system comprises a high-energy ignition device, a burner, an automatic ignition control system and a burning control system, wherein the high-energy ignition device adopts a capacitive discharge type igniter capable of providing the safe and reliable ignition performance; the burner is provided with a flame detection device and can realize the regulation of burning-supporting air and fuel in certain proportion; and the automatic ignition control system has the functions of flame detection, safety protection of the furnace and self diagnosis. The invention has the advantages of high heat efficiency, safety and reliability, stable and controllable burning, energy saving and emission reduction.

Description

technical field [0001] The invention relates to an ignition control system for a tube furnace. Background technique [0002] Tube heating furnace is a kind of thermal heating equipment. It uses the high-temperature flame and flue gas generated when the fuel is burned in the furnace as a heat source to heat the medium flowing at high speed in the furnace tube to make it reach the temperature specified by the process to supply the medium. The heat required in the process of fractionation, cracking or reaction ensures normal production. Compared with other heating methods, the main advantages of tubular heating furnace are high heating temperature (up to 1273K), large heat transfer capacity and easy operation and management. [0003] Tube furnaces play a pivotal role in petrochemical plants, and the energy consumption of tube furnaces is high. The energy consumption of the tube furnace accounts for about 80-90% of the production equipment. Its investment generally accounts f...

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Problems solved by technology

[0009] (4) Tube furnaces usually operate under high temperature and high pressure conditions, and the operating conditions are harsh

[0015] (1) The medium (gas or liquid) heated by the tube furnace is usually flammable and explosive hydrocarbons. Compared with boiler heating water and steam, it is more dangerous and the operating conditions are much harsher. Manual ignition is unsafe;

[0016] (2) Some tube furnaces with electronic ignition (or automatic ignition) have been adopted, and the performance of the ignition device is poor, and the ignition reliability is poor;

[0017] (3) The design of the tube furnace burner is unreasonable and the efficiency is low

The tube furnace has its particularity. In the past, many burners of the tube furnace copied the burners of other boilers without targeted design;

[0018] (4) Although with the development of automatic control technology, PLC and other control automation control devices have been widely used, there is still a lack of overall automation design in the tube furnace control, the program design is unreasonable, and the safety hazards in the boiler ignition control are not solved

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