How to improve the thermal efficiency of a heating furnace?

1. First, select the appropriate type of burner. 2. Adjust the amount of fuel gas as well as the amounts of primary and secondary air to ensure optimal combustion. 3. Pre-heat the fuel gas before it enters the heating furnace, so that it can be fully vaporized for combustion

Report on Ensuring Efficient and Low-Energy Operation of Refining Heating Furnaces http://bbs.hcbbs.com/viewthread.php?tid=181930

Reply to Floor 2: 1. First, select the appropriate type of burner (how to choose and which one to pick). 2. Adjust the amount of fuel gas as well as the amounts of primary and secondary air to ensure optimal combustion (provide more details). 3. Pre-heat the fuel gas before it enters the heating furnace, so that it can be fully vaporized for combustion

The main measures to improve the thermal efficiency of heating furnaces are as follows: (1) Reduce heat loss ① Strengthen management and establish reasonable operating procedures. ②Control the \"three doors and one panel\" to reduce the furnace’s excess air coefficient. ③An automatic control system and computer operation are used. ④Zirconia sensors are used to control the oxygen level in the radiation chamber. ⑤Reduce heat loss from the furnace wall. (2) Absorb more heat using the convection chamber ① The convection chamber uses pin tubes or finned tubes. ②Set up the soot blower. ③Increase the convective tube or appropriately lengthen it. ④Baffle bricks are used for the inner wall of the convection chamber. ⑤Pure radiation furnace with convection chamber. (3) Install a waste heat recovery system: ① Use a rotary air preheater. ②The convection chamber uses cold feed. ③Add a fixed air preheater—steel pipe, cast iron pipe, or glass tube. ④A heat-tube air preheater is used. ⑤Air is preheated using a circulating heat carrier. ⑥A waste heat boiler is used. (4) Other methods: ① Install a heater to preheat the combustion air. ②Use forced air supply or high-energy, high-intensity burners. ③Reduce flue gas from refineries and eliminate torches.

I think there are mainly three aspects: First, flue gas heat recovery； Second, high-efficiency burners ； Third, the oxygen content in the flue gas, that is, air volume control.

Regarding the issue of \"efficiency was okay at first but is now very poor,\" the main reasons analyzed are: 1. Has there been a significant change in the amount of work to be processed? Is soot blowing of the 2 furnace tubes carried out on schedule? Is there coking in the 3 furnace tubes? 4 Is the furnace wall insulation in good condition? 5 Are there any air leaks in the heating furnace? 6 Is there a trend of increase or decrease in negative pressure, oxygen content, and flue gas temperature? 7 Are the burner combustion and air distribution normal? Based on the above reasons, simply exclude and adjust them one by one.

The main measures to improve the thermal efficiency of heating furnaces are as follows: (1) Reduce heat loss ① Improve the insulation of the furnace walls to minimize heat loss through them； ②The excess air coefficient of the furnace is controlled between 2% and 3%. (2) Absorb more heat using the convection chamber ① The convection chamber uses pin-tube or finned tubes ； ②Properly install soot blowers and carry out regular soot blowing ； (3) Install a waste heat recovery system, using an air preheater or a waste heat boiler ； (4) Reasonably configure high-efficiency burners.

1. How to improve the thermal efficiency of heating furnaces – please discuss at http://bbs.hcbbs.com/viewthread.php?tid=326300
2. Improving the thermal efficiency of heating furnaces by upgrading flue gas waste heat recovery systems – http://bbs.hcbbs.com/viewthread.php?tid=146035
3. Eliminating the “bottlenecks” in heating furnaces to improve their thermal efficiency – http://bbs.hcbbs.com/viewthread.php?tid=97136
4. Improving the thermal efficiency of heating furnaces through upgrades to flue gas waste heat recovery systems – http://bbs.hcbbs.com/viewthread.php?tid=40764
5. Measures to reduce energy consumption and improve thermal efficiency in atmospheric and vacuum heating furnaces – http://bbs.hcbbs.com/viewthread.php?tid=117245

When all accessories of the heating furnace are in good condition, the following measures can be taken: 1. Control the exhaust gas temperature of the heating furnace properly, recover the heat from the exhaust gases, and prevent unnecessary damage to the furnace caused by corrosion resulting from the dew point of the exhaust gases； 2. Regularly measure the surface temperature of the heating furnace; where possible, use infrared thermal imaging devices for monitoring and to create temperature maps. By doing this on a regular basis, it is possible to determine whether the furnace lining is in good condition, and any defects in the lining can be detected in a timely manner ； 3. Desulfurize the fuel (gas, natural gas) used in the heating furnace to prevent sulfur in the fuel from accumulating within the soft furnace linings (such as ceramic fiber or ceramic fiber mats), which would reduce the insulation properties of these linings and cause corrosion of the fasteners holding them in place, leading to their failure and damage to the furnace lining ； 4. Far-infrared radiation coating (also known as black crystal ceramic) can be applied to the surface of the furnace lining to reduce heat loss from the furnace surface and protect the lining. All of the above methods can improve the thermal efficiency of the heating furnace.

It is about properly controlling the opening degree of the \"three doors and one panel\".

Is the heated surface contaminated by dust and carbon deposits? Is the air distribution reasonable? If oil is used as fuel, what is the condition of its atomization?

1. Control the flue gas temperature of the heating furnace properly to recover the heat from the flue gases. 2. Reduce heat losses. 3. Install soot blowers appropriately and carry out regular soot blowing. 4. Minimize air leaks in the heating furnace

The key is to strive to reduce the flue gas temperature while ensuring that dew point corrosion does not occur; reducing the amount of air that enters the furnace is another important aspect, and efforts should be made to minimize dust accumulation in the furnace tubes and the flue gas heat exchange system – especially in older furnaces! ! !

Understand the fuel properties and control the air supply properly. . . Pre-empt above. . . :lol

The factors that affect the efficiency of a heating furnace are things such as flue gas temperature, excess air coefficient, and CO content. So what exactly is causing the poor efficiency at the moment? Regarding process issues outside this scope, as far as the operation of the heating furnace itself is concerned, it is necessary to adjust the \"three doors and one panel\" on-site to ensure an appropriate negative pressure and exhaust gas temperature. If it is a process issue that results in too low or too high a heat load on the heating furnace, then the only solution is to adjust the process operations; there is nothing that can be done regarding the heating furnace itself!

Use new energy-saving burners； Adopt technical upgrades to reduce flue gas temperature ； Frequent soot blowing in the heating furnace ； Strengthen equipment sealing to reduce air entry into the furnace.

What was said on the fourth floor is quite comprehensive; here are three additional points: 1. The furnace tubes in the radiation chamber can be cleaned online from time to time, which can reduce the top radiation temperature by more than 50°C； 2. Carry out necessary maintenance on the air preheater to improve heat exchange efficiency ； 3. Select an appropriate fuel; try to avoid using fuels with a high solid content, as this can have a significant impact on the speed of the furnace tubes. This post was last edited by lyybjgz on 2009-3-12 at 12:39.]

1 Ensure good gas quality, free of oil and water. 2 Adjust the flame combustion properly