[Q&A Question 065] 2017.03.06
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This post was last edited by 955559 on 2017-7-21 22:21. [Q&A Question No. 065] 2017.03.06: What should the operator do when the heating furnace requires a lighting nozzle or a shut-off nozzle? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For internal operations, the pressure regulators for the fuel gas and fuel oil in the heating furnace should be switched to manual mode until the operation of the heating furnace becomes stable. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Third Round of HaiChuan Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: HaiChuan Chemical Forum)
When starting the furnace, adjust the negative pressure in its chamber so that it is not too high; ensure that the gas flow is unobstructed and that the control valve is open. When shutting down the furnace, close the gas control valve and increase the opening of the flue dampers to allow the furnace to cool down naturally
The operator should switch the fuel gas flow meter to manual control and set an appropriate opening value; after ignition is complete, adjust it to the suitable temperature before switching back to automatic control； At the same time, close attention should be paid to the temperature distribution along the furnace tube walls; if the distribution is uneven, the operators on site should be notified to adjust the combustion conditions of each burner.
For internal operation, the gas flow control valve should be switched to manual control; automatic or cascade control should only be activated once the gas flow and the temperature at the outlet of the heating furnace stabilize.
For internal operation, the gas flow control valve should be switched to manual control; automatic or cascade control should only be enabled after the gas flow and the temperature at the outlet of the heating furnace stabilize.
For internal operation, the gas flow control valve should be switched to manual control; automatic or cascade control should only be activated once the gas flow and the temperature at the outlet of the heating furnace stabilize.
When the heating furnace ignites or shuts down its burners, the pressure behind the control valve changes. If the regulator is in automatic or cascade mode, the set value will cause the pressure behind the valve to be automatically adjusted back to its original value, resulting in operational fluctuations.
1. Maintain a stable processing volume. 2. Ensure stable fuel gas pressure.
The operator should switch the pressure regulators for the fuel gas and fuel oil in the heating furnace to manual mode until the operation of the heating furnace becomes stable.
For internal operation, the gas flow control valve should be switched to manual control; automatic or cascade control should only be activated once the gas flow and the temperature at the outlet of the heating furnace have stabilized.
Ignition nozzle: First, supply air; then ignite; add fuel. Extinguishment nozzle: Stop supplying fuel; cool down; stop supplying air