Process Burner
Process Burner Introduction
In the petrochemical and oil refinery industry, as the key component in process tubular heater, process burner is used for providing energy through combustion. By using the energy, intermediate products and final products are produced.
Based on the different types of heaters and different products needed during the whole process, process burner will be used in different applications through special design, such as CDU/VDU, delayed coking, hydrogen production, and ethylene cracking, etc.
Through over 30 years of technical iteration and development, Ruichang burner is focused on the low NOx emission, wide-range operation, and product reliability; Providing high quality and good performance products to our client with competitive price is our continuous pursuing target.
Ruichang Process Burner Types
Ruichang provides different types of process burners. The types of process burners can be classified in different ways, such as the flame shape, the fire direction, the NOx emission control, etc.
The video of how a process burner with flat flame works.
The video of how a process burner with round flame works.
Flame Direction of Process Burner
Choosing the right flame direction mainly depends on which application you want the process burner to work with. Basically there are three types of flame directions: up flame, side flame, and down flame.
up flame burning video
side flame burning video
down flame burning video
Why Choose Ruichang Process Burner
For more than 30 years, Ruichang has been dedicating in research, develop and manufacture a huge variety of process burners and related products. In China, we are reliable partners with the world’s largest petroleum and chemical industry leaders, such as CNPC, SINOPEC, and ChemChina, etc. Internationally, we’ve built a long-term partnership with Honeywell.
Ruichang process burner is recognized by the world essentially because of the production quality.
Technical advantages highlights:
- Staged combustion technology
- Special-designed tiles
- Low NOx oxygen combustion technology
- Fume gas recycle technology
- NOx emission can be reduced to 30ppm, together with UOP Callidus
Process Burner Applications
The process burner is a universal product that can be applied in either a refinery project or petrochemical industry. The main purpose is to provide a heating source for specific process furnaces and other applications.
Hydrogenation burner
The hydrogenation unit is normally the square box type radiation heater which inside the process tube is hydrogen & oil or hydrogen only, it required that burner heat release shall be even distribution.
Based on this situation, the type of burner design required that every single unit shall have the feature of fuel gas only, small size, low energy with flat flame shape; by using large quantities of burners with flame direction to the heater wall, and then transfer the heat to the heater tube by radiation method, the heat even distribution on heater tube achieved which will avoid coking at the local area on heater tube.
Burner for reforming heater
Currently, the reforming heater is normally 4 in 1 square box unit with the U type heater tube, and the burner distribution on the heater is evenly on two sides and flame on the counter direction with round shape.
This type of burner is normally natural draft type and fuel gas only with staged combustion to meet the requirement of low NOx emission. By using staged combustion, it will also achieve the long flame shape which will reduce the heat transfer uneven at the heater tube of the large reforming unit to avoid coking and overheat at a local area of the heater tube.
Burner for VDU & CDU
As VDU and CDU are large vertical heater at the refinery process, this type burner normally has the feature of big load at a single unit, long flame shape to match with the heater. This type of burner can take gas only for fuel or oil only for fuel and even oil and gas combined as fuel. For fuel oil, normally take superheat steam for internal mixing atomizing, once there is no steam, compressed air can be used as a replacement.
For the pressure before burner (negative pressure at heater bottom) larger than 70 Pa, the natural draft type can be used, meanwhile, the forced draft method also can be used with pressure before burner smaller than 500 Pa, and preheat air temperature shall be no larger than 320℃.
One thing we need to notice that when we do the oil and gas combination combustion, the combustion effect will be not so good when the total load of the burner is beyond the Max. design load.
Burner for Delayed coking unit
As delayed coking unit normally has the feature of high viscosity, low-pressure drop requirement, and required heat even distribution, the burner for this application is a normally small load, large quantity, flat and short flame. And only by this configuration, it can meet the requirement on heat distribution evenly at the hearth to avoid coking at the local area to influence the service life of the heater tube.
This type of burner is fuel gas only with staged combustion, by using staged combustion, flame size increased and flue gas circulation enhanced which reduced the flame temperature at high temperature zone and that leads to a decrease in the Low NOx emission.
For the pressure before burner (negative pressure at heater bottom) larger than 70 Pa, the natural draft type can be used, meanwhile, the forced draft method also can be used with pressure before burner smaller than 500 Pa, and preheat air temperature shall be no larger than 320℃.
Burner for the hydrogen production application
The hydrogen production unit is normally double sides radiation vertical square box heater which belongs to reacting heater, the medium inside the heater tube is conversion gas, and hearth temperature of this unit normally over 950℃. During this application, the reaction has two stages in which the requirement on heater tube material is quite high, especially the tube can’t overheat at the local area, otherwise, carbon deposition will happen. The high-density area of heat-absorbing at the heater tube is in the area of 3m to heater top.
Under this situation, the heater has the very high requirement on burner performance, the flame shall be upright and outspoken, and under the normal load, flame length shall be controlled within 2.5~3.0m, meanwhile, the combustion shall mainly consider the combustion on bypass desorption gas with low heat value (2000 Kcal/nm3) and low pressure (less than 0.02Mpa before burner); combustion air shall be preheated air, under a certain heater, the temperature of preheating air shall be larger than 550℃, then the burner also required good method on heat insulation and isolation.
Low NOx Process Burner
Due to the pressure from environmental protection, there is a rising demand for low NOx burners in recent years. Based on the NOx emission control, there are three types of process burners: conventional burner, low NOx burner, and ultra-low NOx burner.
Ruichang manufactures and sells all three types of burners. Currently, the conventional burner accounts for 30% of the total amount of production. While low NOx burners account for 70%. Among the low Nox burners, NOx emission≤ 50ppm accounts for 60%, and NOx emission≤ 30ppm accounts for 10%.
For more details of the low NOx burner, please click the low NOx burner page to learn more about each model.
- GCFB-V Low NOx Burner
- GRFB-Ⅲ Low NOx Burner
- GFFW-Ⅲ Low NOx Burner
- CCFB-ⅠOil and Gas Combined Burner
- GCAR-Ⅱ High Temperature Top Fired Burner
- RC-C Side Wall Flameless Burner