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Product Description: How to Translate
The WRNKM series cycle produced by our companySpecial wear-resistant thermocouple for vulcanization bedThe wear-resistant protective tube made of different materials such as plasma spraying technology, high chromium alloy cast iron, and K-alloy greatly improves the wear resistance, extends the service life, and expands the temperature measurement range. It is used in power plant circulating fluidized bed boilers, ball mills, coal mills, cement plants, smelters, and other places where the temperature sensor protective tube is severely worn.
Product Features:
1. The surface hardness of tungsten carbon alloy treated with MVD reaches Rockwell HRC76 (approximately 1750 Vickers, ceramic grade), which is 8 times the hardness of ordinary stainless steel. The hardness of ordinary wear-resistant materials is below HRC60.
2. High creep point of sheath metal: 1850-2050 ℃; Melting point: 2100 ℃, no bending deformation occurs below 1800 ℃ when burned at high temperatures.
3. The surface alloy layer forms a whole with the substrate stainless steel, so the coefficient of thermal expansion and thermal brittleness are exactly the same, and cracking will not occur at high temperatures.
4. The oxide protective film generated at high temperatures effectively prevents oxidation corrosion of gases such as So2.
With the popularization of circulating fluidized bed (CFB) boilers in China's power industry, it is urgent to adopt ideal high-temperature, corrosion-resistant, and wear-resistant thermocouples to monitor furnace temperature.
The temperature control points for circulating fluidized bed boilers mainly include:
1. Fluidized bed main bed
The dense phase zone of the sulfide bed (at the distribution plate) has a temperature range of 0-1100 ℃, and the medium contains coal powder and coal blocks, as well as a large amount of H2S, SO2, NH3, CO2 strongly corrosive gases produced by combustion. The material in fluidized state has strong scouring force.
The dilute phase zone of the fluidized bed has a temperature range of 0-1100 ℃, and the material in the sulfurized state has strong scouring force and contains corrosive gases.
2. Inlet and outlet of cyclone separator and return feeder
The temperature range is 0-900 ℃, with a high-speed airflow of about 25-27m/s at the inlet and containing granular media, which has extremely strong scouring force.
3. Fluidized bed slag cooler
The temperature range is 0-800 ℃, and it contains particles and corrosive gases such as CO, CO2, SO2, H2S, etc.
Given the aforementioned measurement environment, the company has developed a new generation of composite thermocouples that are resistant to high temperatures, corrosion, and wear. thatSpecial wear-resistant thermocouple for vulcanization bedDurable, safe and reliable, with a long service life, good shock resistance, high thermal conductivity, oxidation resistance, thermal shock resistance, high temperature resistance, corrosion resistance, erosion resistance, no nodules, no slag formation, easy installation and use. It can be used for special temperature measurement occasions ranging from 0 to 1300 ℃. It is an irreplaceable product for thermocouple protection tubes made of materials such as corundum, high alumina, graphite, and oxide silicon carbide in China. It is currently the preferred temperature sensor for circulating fluidized bed boilers.
Main technical indicators:
1. Temperature measurement range: 0-1250 ℃
2. Wear resistance hardness: (HRC) ≥ 60
3. Anti erosion: 30M/S
4. Anti corrosion: resistant to corrosive gases such as CO, CO2, SO2, H2S, NH3, etc
5. Density of spray welding layer:>98%
6. Basic structural strength: ≥ 30Mpa
Specification of outer sleeve: ф 18-34m/m
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