How to correctly use a zirconia oxygen sensor in a controlled atmosphere heating furnace?

Release time: 2019-07-10

　　With the continuous development of modern carbon potential control technology, zirconia oxygen probes have become the main means of carbon potential control in controlled atmosphere carburizing and carbonitriding equipment. The correct use of oxygen probes in controlled atmosphere heat treatment equipment is key to the precise control of carbon potential in controlled atmosphere furnaces. Today, the technical engineers of Anhui Tianfen Instrument Co., Ltd. will provide a detailed analysis of the correct use of zirconia oxygen probes in controlled atmosphere furnaces. Let's take a look!

　　

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　　Key points of use:

　　1. Carefully inspect the oxygen probe

　　Zirconia oxygen analyzers and oxygen probes are highly sensitive and accurate sensing instruments. Their core component, the zirconia head, is easily broken by impact. Before using a new zirconia oxygen probe, we should carefully and thoroughly check for any bending or collision marks on the zirconia oxygen probe. Check the outer tube of the zirconia oxygen analyzer probe for cracks, and check the zirconia probe itself for cracks, breakage, or ceramic fragments.

　　2. The installation location is very important

　　When installing the zirconia oxygen probe, the installation location should be inserted into the furnace chamber by 50-100 mm. This ensures that it is installed in an area with relatively stable furnace gas. Never install it near the dripping point of various渗剂, near fans, or at the furnace entrance, corners, or in areas with significant vibration. If installed on the lid of a well-type furnace, etc., a protective cover should be added to the front end of the zirconia oxygen probe, and good gas circulation should be ensured. How to correctly use a zirconia oxygen probe in a controlled atmosphere furnace?

　　3. Maintain a good seal

　　Ensure a good seal between the oxygen probe mounting bracket and the furnace shell to prevent leakage. Use shielded signal lines for the oxygen probe connections. Do not ground the shield. Pay attention to the positive and negative poles of the wiring. The shielded signal line should be routed separately to prevent signal interference.

　　

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　　4. Avoid rapid cooling and heating

　　The zirconia oxygen probe should be installed in the furnace at room temperature as much as possible. It should be heated to the operating temperature along with the furnace. Rapid cooling and heating should be avoided. Handle with care during installation. If a special situation arises and the probe needs to be removed or inserted at high temperature, the removal or insertion speed should be controlled to within 30 mm/min. How to correctly use a zirconia oxygen probe in a controlled atmosphere furnace?

　　5. Try not to install and use when pre-carburizing is insufficient

　　When installing and using the zirconia oxygen analyzer probe for the first time, the zirconia probe should be pre-carburized for 8-24 hours. Try not to install and use the zirconia oxygen probe when the new furnace is just starting pre-carburizing. Because during the pre-carburizing of a new furnace, there may still be a lot of moisture and other impurities in the furnace, and the atmosphere will be unstable, which will directly affect the use of the zirconia oxygen probe.

　　As a professional manufacturer of zirconia oxygen probes in China, Anhui Tianfen Instrument Co., Ltd. masters international leading core technologies and is equipped with advanced production equipment, achieving a perfect fusion of leading technology and product functions. Its research and development of zirconia oxygen probes have the advantages of accurate measurement, fast response speed, and simple intelligence, and it also provides maintenance and repair services for imported zirconia oxygen probes. How to correctly use a zirconia oxygen probe in a controlled atmosphere furnace?

　　High-quality products and a mature after-sales service system have enabled Anhui Tianfen Instrument Co., Ltd. to gradually become a well-known and strong professional service provider of zirconia oxygen analyzers in the power, metallurgy, heating, building materials, and electronics industries. Zirconia analyzers and zirconia oxygen probe series products are sold to 23 overseas countries!

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EXNFZRO®2 Explosion-proof Zirconia Oxygen Analyzer Significance of Measuring Oxygen Content with Zirconia Analyzer Flue gas oxygen content is one of the important monitoring parameters for boiler operation and an important basis for reflecting the completeness of combustion equipment and boiler operation. Its value is related to factors such as boiler structure, type and nature of fuel, boiler load, operating air supply conditions, and equipment sealing conditions. The smaller the oxygen content, i.e., the smaller the excess air coefficient, the more it indicates increased heat loss due to incomplete chemical combustion and mechanical incomplete combustion; the larger the oxygen content, i.e., the larger the excess air coefficient, the more it indicates excessive air supply. Excess air causes a drop in furnace temperature, which not only affects combustion but also carries away a large amount of heat and dust, increasing the calculated concentration of pollutant emissions. At the same time, a large air volume also increases the power consumption of flue gas exhaust. Controlling flue gas oxygen content is very important for controlling the combustion process and achieving safe, efficient, and low-pollution emissions. Application Scope The zirconia oxygen analyzer is an instrument used to monitor and control the oxygen concentration in combustion gases, boilers, and industrial furnaces. It is widely used in coal-fired power plants, gas boilers, waste incineration boilers, hazardous waste disposal incinerators, petrochemical cracking furnaces, metallurgical industry blast furnace hot blast stoves, oxygen-enriched combustion air pipelines, sintering furnaces, heating furnaces, heat treatment furnaces, metal material annealing furnaces, air separation oxygen production, food industry, cement kilns in the building materials industry, glass kilns, inert gas protection furnaces in the semiconductor industry, electrode material production furnaces in the lithium battery industry, and waste lithium battery recycling. It helps save energy and can also reduce CO2, SOX, and NOx emissions by controlling complete combustion, contributing to environmental protection, preventing global warming, and reducing air pollution. Anhui Tianfen Instrument Co., Ltd. is a manufacturer of zirconia analyzers, providing products for steel mills, chemical plants, power plants, waste power plants, and more. Their product range includes TKFX-ZOA zirconia analyzers, ZO-2000 desktop zirconia analyzers, MKFB-400-A/H explosion-proof zirconia analyzers, ZOA-300B zirconia analyzers, ZO-FIIB explosion-proof zirconia oxygen analyzers, CY-ZC, CY-ZDA zirconia analyzers, OXT3000 series zirconia oxygen content analyzers, integrated oxygen analyzers, corrosion-resistant zirconia analyzers, YB-88G zirconia oxygen analyzers, OXT1000 series zirconia analyzers, TKZO-5 zirconia analyzers, NFZRO2-5 zirconia analyzers, ZR402G zirconia oxygen analyzers, CE-2C, CE-2D zirconia analyzers, ZFK8R zirconia analyzers, hot blast stove zirconia analyzers for steel mills, special zirconia analyzers for hazardous waste, MK-400-A-FHC corrosion-resistant zirconia analyzers, abrasion-resistant zirconia analyzers, EXFZZRO2-88 explosion-proof zirconia analyzers, FZZRO2-5 zirconia oxygen analyzers, NFZO-05 high-temperature extraction zirconia analyzers, YB-88GJ-ZW zirconia analyzers, abrasion-resistant zirconia analyzers, oxygen analyzers, trace oxygen analyzers, steel mill zirconia analyzers, waterproof zirconia analyzers. Oxygen analyzers include the OAM-800 oxygen analyzer (zirconia) and the OAM-802 explosion-proof oxygen analyzer (zirconia), as well as the BOA-807 series (integrated) and BOA-807-R (split) series specifically for waste power plant boilers. Oxygen analyzers measure the oxygen concentration in flue gas and other non-combustible gases during combustion. Tianfen oxygen analyzers include the OAM-800 oxygen analyzer (zirconia) and the OAM-802 explosion-proof oxygen analyzer (zirconia). The standard oxygen analyzers include the integrated OAM-800 and the split OAM-800-R. They use a direct insertion online measurement method, can display measurement data and fault information on-site, and feature high accuracy, fast measurement, and low maintenance. The OAM-800 series features zirconia sensors with nano-coatings and various abrasion-resistant protective tubes. The explosion-proof oxygen analyzers include the integrated OAM-802 and the split OAM-802-R. These are PCEC-certified explosion-proof products suitable for boilers, heating furnaces, incinerators, converters, and other explosion-proof environments.
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