【Q&A Question 231】2018.08.25
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【Q&A Question 231】August 25, 2018: Briefly explain the reasons why the outlet temperature of the furnace cannot be increased. 1. Low gas pressure; 2. Excessive hydrogen content in the gas; 3. Water present in the gas or steam mixing in with it; 4. Clogged nozzle holes or blocked screens in the flashback arrester; 5. Inappropriate setting of the flue dampers or improper adjustment of the waste heat recovery system; 6. Increased feed rate or reduced temperature of the material entering the furnace; 7. Incomplete combustion; 8. Overloading of the furnace; 9. The furnace going out. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
(1) The control valve, orifice plate, or filter is clogged. (2) The flue damper opening is too large. (3) Incomplete combustion. (4) The heating furnace is overloaded. (5) Coking or extinguishing of individual burners.
Personal opinion: 1. Low pressure of fuel gas. 2. Clogged flame arrester for fuel gas. 3. Faulty or clogged fuel gas control valve. 4. Water present in the fuel gas or steam leaking in. 5. Clogged nozzle orifice. 6. Excessive opening of flue dampers. 7. Incomplete combustion. 8. Too high hydrogen content in the fuel gas
(1) The control valve, orifice plate, or filter is clogged. (2) The flue damper opening is too large. (3) Incomplete combustion. (4) The heating furnace is overloaded. (5) Coking or extinguishing of individual burners.
1 Low gas pressure, 2 Excessively high hydrogen content in the gas, 3 Water present in the gas or steam mixing in, 4 Clogged nozzle or blocked screen in the flashback arrester, 5 Inappropriate opening of the flue dampers or improper adjustment of the waste heat recovery system, 6 Increased feed rate or reduced temperature of the material entering the furnace, 7 Incomplete combustion, 8 Overload of the furnace, 9 Furnace shutdown.
1. The fuel gas (oil) pressure is low. 2. The wind is not suitable. 3. Excessive negative pressure. 4. Excessive feed rate. 5. Moisture in the raw material strip.
1. Insufficient fuel gas pressure; 2. Excessive light components in the fuel gas, resulting in insufficient calorific value; 3. Incomplete combustion
1 Pressure fluctuations in the gas 2 Tube rupture in the furnace 3 Coking of the furnace tubes 4 Significant increase in feed volume 5 Increase in circulating gas volume
1. Excessive air flow, backburning 2. Excessive feed rate 3.
① Gas pressure is low. ② The flame arrester is partially blocked. ③ Coking and blockage of the nozzle in the burner section. ④ The opening degree of the flue baffle and air duct butterfly valve is inappropriate. ⑤ Contamination blocking the control valve. ⑥ The heating furnace is overloaded.
The heating furnace has low thermal efficiency and poor heat transfer performance； Low temperature of materials entering the furnace ； High load ； Changes in gas composition ；