Kiln Burner Nozzles, Torches, Incinerators, Combustion Equipment Accessories

Product Description

Scope of application

It is widely used in fields such as industrial furnaces, boilers, and drying equipment. Based on fuel types (fuel oil, gas, biomass fuel) and combustion requirements, it can precisely control flame length and temperature distribution to adapt to different heating processes.

 

How it works

 I. Core Common Principle: "Atomization/Dispersion + Mixing" is KeyRegardless of the type of nozzle, its ultimate goal is to solve the problem of "difficulty in fully burning fuel" - liquid fuels (such as diesel oil and heavy oil), if burned directly, will not burn completely due to their small surface area and insufficient contact with air (resulting in black smoke and carbon deposits); gaseous fuels (such as natural gas), if ejected directly, will cause flame instability due to uneven flow rate/concentration. Therefore, the core functions of a nozzle are:
Breaking the fuel form: Shattering liquid fuel into tiny droplets (atomization) or dispersing gaseous fuel into a uniform airflow (dispersion), thereby significantly increasing the contact area between fuel and air;
Controlling the mixing ratio: Guiding air and atomized fuel to mix according to the "optimal combustion ratio" (e.g., the ratio of fuel oil to air is approximately 1:14.5) through structural designs (such as the position of air holes and the size of channels), laying the foundation for full combustion.
 

 

 

 

.II. Working Principles by Type (Classified by Atomization Method)The core difference between different nozzles lies in "how to achieve atomization/dispersion". Currently, there are three most commonly used types in industry:

Pressure Atomization Nozzle (Suitable for Fuel Oil, Most Common)
Core Power: Relies on the high pressure of the fuel itself (usually 0.2-1.0MPa) to generate high-speed rotation or impact through a special channel structure, thereby achieving atomization.
Specific Process:
Step 1: High-pressure fuel oil enters the nozzle's "swirl chamber" (with spiral guide grooves inside) from the inlet;
Step 2: The fuel oil rotates at high speed along the guide grooves in the swirl chamber, forming a "rotational vortex" and simultaneously gathering towards the edge of the swirl chamber due to centrifugal force;
Step 3: When the vortex is ejected from the nozzle outlet (a small circular hole), the rotating oil film is "torn" into tiny droplets with a diameter of 50-200μm due to sudden pressure reduction (similar to water droplets thrown off the edge of a rotating umbrella);
Step 4: The atomized droplets form a conical "spray field", mix naturally with the surrounding air, and form a stable flame after ignition.
Features: No additional atomization medium (such as steam, compressed air) is required; it has a simple structure and is suitable for medium and low-pressure combustion systems (e.g., small industrial boilers).

 

 

 

.Pneumatic Atomization Nozzle (Suitable for High-Viscosity Fuel Oil, e.g., Heavy Oil)
Core Power: Relies on the high-speed airflow of high-pressure atomization medium (compressed air or steam, with a pressure of 0.1-0.5MPa) to impact and tear fuel oil for atomization. It is especially suitable for fuels with high viscosity that are difficult to atomize (e.g., heavy oil, residual oil).
Specific Process:
Step 1: Fuel oil flows out at a low speed from the central channel of the nozzle (with low pressure, only 0.05-0.2MPa), while the high-pressure atomization medium (e.g., compressed air) is ejected at a high speed from the "annular air holes" outside the fuel channel;
Step 2: The high-speed airflow collides violently with the low-speed fuel oil at the nozzle outlet, and the "shear force" of the airflow shatters the viscous fuel oil into tiny droplets (the droplet diameter can be as small as 30-80μm, finer than that of pressure atomization);
Step 3: At the same time, the airflow drives the atomized droplets to spread forward and mix with more air, avoiding carbon deposition caused by uneven atomization of high-viscosity fuel oil;
Features: It has a good atomization effect (suitable for high-viscosity fuels), but requires additional supply of atomization medium (e.g., air compressor, steam source), resulting in slightly higher energy consumption. It is often used in large industrial furnaces and kilns.

 

Technical features

.Gas Burner Nozzle (Suitable for Gaseous Fuels, e.g., Natural Gas, Liquefied Petroleum Gas)
Core Logic: Gaseous fuels do not require "atomization"; the key lies in "uniform dispersion + flow rate control" to prevent flame flashback or blow-off.
Specific Process:
Step 1: Gas enters the nozzle's "flow distribution chamber" from the inlet, and the airflow is evenly distributed through the internal "flow equalizing orifice plate" (with multiple small circular holes) to avoid excessively high local flow rates;
Step 2: The evenly distributed gas is ejected from the "diffusion holes" at the nozzle outlet. The outlet is usually designed with an "air entrainment channel" - when the gas is ejected, it creates negative pressure to actively "suck in" surrounding air (entrainment effect) for preliminary mixing;
Step 3: The gas-air mixture enters the burner's "mixing chamber" for further thorough mixing, and finally is ejected from the fire holes and ignited to form a stable blue flame;
Key Design: The outlet flow rate must be strictly controlled - excessively low flow rate will cause "flashback" (flame backflow into the nozzle interior, leading to abnormal noise or damage); excessively high flow rate will cause "blow-off" (flame blown away from the fire holes and extinguished). Therefore, the nozzle outlet diameter and gas pressure must be matched (e.g., the outlet diameter of a natural gas nozzle is usually 0.8-1.2mm, with a pressure of 2-5kPa).

 

 

 

• .III. Core Classification (By Fuel Type and Working Principle)
  1. Fuel Oil Nozzles
  Pressure Atomization Nozzle: Relies on the high pressure of the fuel oil itself (0.2-1.0MPa) to generate a rotating vortex through the swirl chamber. This causes the fuel oil to be torn into droplets of 50-200μm when ejected from the outlet. It has a simple structure, is suitable for low-viscosity fuels such as light oil and diesel oil, and is commonly used in small industrial boilers.
  Pneumatic Atomization Nozzle: Uses the high-speed airflow of a high-pressure atomization medium (compressed air/steam, 0.1-0.5MPa) to shear the fuel oil. It can atomize high-viscosity fuels (e.g., heavy oil, residual oil) into droplets of 30-80μm, providing better atomization performance. However, it requires an additional supply of atomization medium and is mostly used in large industrial furnaces and kilns.
  2. Gas Nozzles
  Gas nozzles do not require atomization. Their key function is to achieve uniform gas dispersion through the flow distribution chamber and flow equalizing orifice plate. Combined with the air entrainment channel at the outlet, they suck in air for pre-mixing. The flow rate must be strictly controlled (to prevent flashback or blow-off). They are suitable for gaseous fuels such as natural gas and liquefied petroleum gas, and are widely used in civil gas stoves and industrial gas combustion equipment.

 

 

IV. Key Technical Characteristics
Atomization Particle Size (for Fuel Oil Nozzles): The smaller the droplet diameter (e.g., down to 30μm for pneumatic atomization), the more sufficient the combustion and the lower the energy consumption.
Spray Angle: The conical spray angle (30°-90°) formed by the fuel oil nozzle must match the combustion chamber to ensure uniform flame coverage.
Flow Rate and Pressure: The outlet diameter (e.g., 0.8-1.2mm for natural gas nozzles) and working pressure (2-5kPa) of gas nozzles must be accurately matched to ensure stable flow rate.
Material: Mostly made of 304/316L stainless steel and high-temperature resistant alloys, which can withstand high temperatures (up to 600ºC and above) and fuel corrosion.

 

Company Profile

 

 

 

 

 

 

 

 

 

 

Address: Huji Industrial Park, Deshang Expressway, Mudan District, Heze City, Shandong Province, China
Business type: Manufacturer/factory, trading company
Business scope: manufacturing and processing machinery
Management system certification: ISO9001:2015 ISO45001:2018 ISO14001:2015
Main products: Ground flare, Biogas flares, flare stack,
Thermal Oxidation Furnace, Flue gas purification equipment

Heze Zexuan Equipment Manufacturing Co., Ltd. is an enterprise engaged in the manufacture of special equipment for environmental protection; sales of special equipment for environmental protection; application of industrial automation technology; sales of power electronic components; research and development of mechanical equipment; sales of intelligent instruments and meters; manufacturing of intelligent instruments and meters; research and development and promotion of comprehensive utilization of waste gas and VOCs treatment technology.
The company's main products and service directions: manufacturing of ground torches, elevated torches, waste gas venting torches, biogas torches, three waste incinerators, and wastewater treatment equipment, industrial automation and DCS system applications, wastewater treatment projects, VOCs treatment equipment and engineering construction, petrochemical accessories and instrument sales, petrochemical equipment installation, maintenance and repair, etc.; support product customization services and OEM services in the same industry, from design to manufacturing, installation, commissioning, and after-sales one-stop service.

 

Certifications