K type wear-resistant electric couple

       Special wear-resistant thermocouples for garbage power plants can be divided into the following three categories according to the material of wear-resistant casing, and each category has its own unique characteristics:

       1. Wear-resistant high temperature alloy: According to the characteristics of high temperature wear environment, the pure alloyed anti-explosive thermocouple is specially designed for vacuum smelting, has high temperature oxidation resistance and high high temperature strength, and is drilled as a whole. Become. It has few processing defects, high reliability, good high temperature strength and wear resistance, high price, and the use temperature is 800～1200℃.

       2. Composite casting wear-resistant alloy: The composite armoring technology is used to add wear-resistant particles to the matrix of high-temperature alloys, and precision melt-casting is used. No turning processing is required. The casing has high hardness and high temperature oxidation resistance. The magnetic flap level gauge has a few casting defects but does not affect the high temperature wear resistance and sealing performance. It uses ordinary high temperature wear resistance casing, the price is moderate, and the use temperature is 800 ~1200°C.

       3. Ion implantation of tungsten carbide: Using stainless steel as the matrix, ion implantation technology is used to implant tungsten carbide particles on the surface of the casing. With high hardness, high strength, high toughness, especially wear-resistant, the thickness of the wear-resistant layer is 0.5 ~ 1.5mm, the outer is hard and the inner is tough, the diameter can reach φ8, the surface quality is good, the operating temperature is 0 ~ 800 ℃, and it is used in the coal mill in power plants The life span is more than 2 years.

       Material classification of wear-resistant thermocouples for garbage power plants:

       1. Cermet wear-resistant: adopts recrystallized silicon carbide cermet protection tube, high temperature can reach 1300℃, built-in K-index or S-index armored core, specially suitable for high temperature resistance of cement kiln tail, circulating fluidized bed, etc. Temperature measurement in grinding conditions.

       Material composition: SiC

       Operating temperature: 0～1600℃

       2. Special wear-resistance for hot blast stove: new silicon carbide cermet protection tube is used, and the high temperature can reach 1300℃. The inner core is high temperature armored core with S index or B index, which is specially suitable for temperature measurement in hot blast stove.

       Material composition: SiC

       Operating temperature: 0～1600℃

       3. The high-temperature alloy wear-resistant head, inner armored core, can not only have high corrosion resistance to fly ash particles, it is an ideal temperature sensor used in high temperature and wear-resistant environments in the metallurgical industry.

       Material: K1320 heat-resistant and wear-resistant alloy

       Temperature: 0～1200℃

       4. High-temperature alloy wear resistance 2: Special heat-resistant and wear-resistant alloy materials are used as the outer protective tube for temperature measurement, and the inner armored core has high corrosion resistance to particle erosion. It is used in the metallurgical industry for high temperature, Ideal temperature sensor in wear-resistant environments

       Material: 3YC52 or GH3030 heat-resistant and wear-resistant alloy

       Temperature: 0～1200℃

       5. Iron-aluminum porcelain protection tube

       The iron base contains aluminum and the A12O3 powder is cleverly added to produce iron-aluminum porcelain (TLC) with special gold content. The iron-aluminum porcelain alloy is made into a thermocouple (resistance) protection tube, which becomes the key to iron-aluminum porcelain thermocouple (resistance) 0 pieces-iron-aluminum porcelain protective tube. According to the working temperature, wear, medium type, pressure, etc., different series of iron-aluminum porcelain protective tubes are made. The existing series: TLC, TLC1, TLC2, TLC3, TLC4 and TLC5 six series.

       TLC type: resistance to hydrochloric acid, nitric acid, sulfuric acid, sodium hydroxide, potassium hydroxide solution. The working temperature is divided into two types: 350°C and 750°C.

       TLC1 type: oxidation resistance, sulfide resistance, zinc vapor corrosion resistance, high wear resistance, good thermal shock resistance, working temperature 1100°C. After actual use, the service life of the zinc concentrate boiling furnace is 4 months, the service life of the pyrite boiling furnace is 12 months, the service life of the boiling furnace and circulating fluidized bed boiler furnace is 6 months, and the service life of the ball mill and fan mill is 6 months. -8 months.

TLC2 type: working temperature 1250°C, wear resistance is lower than TLC1 type, compared with ceramic tube thermal shock resistance, high temperature thermal strength, working pressure (16MPa and other technical indicators are better, especially suitable for 1250°C Thermocouple protection tube of degree S.

TLC3 type: It is improved from TLC2 type. In addition to the characteristics of TLC2 type, it has a special improvement in wear resistance. Under the same working conditions, it can double the life. Working temperature is 1300°C.

TLC4 type: It must be made from TLC1 type. In addition to the characteristics of TLC1 type, it has a special improvement in wear resistance, which is much higher than TLC1 type. Under the same working conditions, it can increase the life by three times. 1100°C. After actual use, the life of the protective tube for temperature measurement at the inlet and outlet of the ball mill can reach 36 months.