Blast furnace hot blast stove thermocouple (anti-leakage structure) is equipped with a leak-proof structure, which can completely avoid the overflow of high-temperature air flow caused by the damage of the protective tube, and effectively avoid the safety accident of the blast furnace parking. The hot blast stove thermocouple produced by Anhui Tiankang has the characteristics of leak prevention, high pressure resistance, high temperature air flow erosion resistance, anti-phosphorus impurities to make the wire brittle and long service life. Boiler Specific Thermocouple is specially used for the temperature measurement of hot blast stove ≤1250 ℃ in the steel industry.
Characteristics of Blast furnace hot blast stove thermocouple (anti-leakage structure)
1. The thermocouple protection tube of the hot blast stove has high temperature resistance, oxidation resistance, sulfidation resistance, wear resistance, impact resistance, corrosion resistance, thermal shock resistance, long service life and moderate price.
2. The thermocouple of the hot blast stove can be used at a temperature of ≤1250 ℃ for a long time. The whole product has anti-vibration structure design. The K-type thermocouple temperature measuring element adopts imported K-type thermocouple wire.
3. The reference service life of the thermocouple protection tube (iron aluminum porcelain T6, maximum outer diameter) of the hot blast stove is 4-7 months.
4. When the thermocouple of the hot blast stove is divided into T6 protection tubes, the measuring end adopts a precision cast wear-resistant head (length 300mm-500mm), which is welded to the tail high temperature stainless steel to grow a protection tube; when using the 3YC52 material protection tube, the protection tube is the whole 3YC52 tube.
5. The internal structure design of the thermocouple comprehensively considers the pollution of the filaments by the phosphorus impurities in the steel plant environment. The phosphorus contamination of the filaments leads to the brittle fracture of the filaments, which is the most fundamental and most common reason for the damage of the hot blast stove in the steel plant. You can refer to the technical article "Analysis of the Causes of Brittle Breaking of Platinum-Rhodium 10-Platinum-Couplings of Thermocouples in Steel Factory Hot Blast Furnace" to find out exactly.
6. When the thermocouple of the hot blast stove is in the working condition of 1000-1300 ℃ and the thermal pressure of 0.3-0.7MPa, there is no leakage prevention device. When the thermocouple protection tube of the hot blast stove is damaged, the high-temperature air flow in the hot blast stove will rush to the hot blast stove through the thermocouple junction box. Outside, it will cause potential safety hazards to equipment and personnel, and the hot blast stove will stop when handling hot air leakage accidents, which will cause unnecessary losses to the factory! It is not easy to use this kind of hot blast stove thermocouple in steel mills! !! The rear end of the thermocouple produced by Changhui is equipped with a sealing flange and anti-leakage device. In the case of damage to the thermocouple protection tube, the hot air is still sealed in the thermocouple and will not leak to the outside of the thermocouple. The instrument worker can wait until the hot air furnace It is very beneficial to improve the economic efficiency of the factory to replace the damaged thermocouples when the vehicle is stopped.
Note: U2 in the figure above refers to the effective length of the hot blast stove thermocouple deep into the hot blast stove. This length is very important: the effective length is too long to measure the average temperature of the burning zone in the hot blast stove
Blast furnace hot blast stove thermocouple (anti-leakage structure) Ordering instructions
1. Indicate the actual length of the thermocouple index number of the hot blast stove thermocouple, the actual normal operating temperature and the maximum operating temperature range and the working conditions, so that the engineer of the hot blast stove thermocouple production plant can review your selection is it right or not.
2. The diameter and length of the thermocouple protection tube of the hot blast stove. Generally speaking, the higher the temperature, the larger the outer diameter of the thermocouple (the wall thickness of the protection tube).
3. If the thermocouple of the hot blast stove has fasteners and flange devices, the relevant dimensions need to be provided.
Thermocouple sales 2
Thermocouple sales 1