Analysis of wear-resistant thermocouple protection tube material performance between their respective advantages and disadvantages compared

Silicon nitride combined with silicon carbide technology on wear-resistant thermocouple, has a good thermal conductivity, reting resistance and abrasion resistance, scouring resistance, no pollution, the highest use of high temperature of 1450 ℃, widely used in liquid aluminum, copper, zinc liquid and other non-ferrous metal liquid temperature test heat protection.

such as chemical, smelting, power plants, cement plants, etc. , using ordinary thermocouple, heat resistance is easy to damage. On these occasions, therefore, it must adopt wear-resisting thermocouple ( Resistance) 。 The thermocouple ( Resistance) Especially for export, fluidized bed, the coal mill, secondary air temperature coal and cement industry.

wear-resistant thermocouple protection tube material selection according to actual circumstances, the Chinese authorities are too lai surfacing welding wear-resisting, SiC protecting tube of waiting, want to know the measured temperature and the state of the measured medium to be sure, not a Fang Zizhi all ills. You can contact us three chang instrument co. , LTD. , we make this product a lot of experience.

wear-resisting performance and function of the thermocouple protection tube is what?

protection tube is used to prevent or reduce all kinds of harmful gases, harmful material for hot electrode erosion and high temperature flame directly or air directly scour; To prevent the direct contact heat conductive medium and electrode: in addition, there are fixed and support the role of the hot electrode.

in the first place, wear-resistant thermocouple is a good variety of points, application environment is selected for different material is different, according to the model selection of the site environment. No specific material.

wear-resistant thermocouple materials comparison is as follows:

1, metal ceramic wear resistance: the protection of silicon carbide ceramic tube, high temperature can reach 1300 ℃, built-in or K S dividing armored core body, specially applicable to the cement preheater, working condition of circulating fluidized bed contour U. S. wear-resisting of temperature measurement.

material composition: SiC

use temperature: 0 ~ 1600 ℃, hot blast stove is special wear-resisting: using new type of silicon carbide ceramic protection tube, high temperature can reach 1300 ℃, the soft-core degree high temperature S dividing or B armored core body, specially suitable for hot blast stove temperature measurement.

material composition: SiC

use temperature: 0 ~ 1600 ℃

2, high temperature alloy wear-resistant, built-in armored core body, the erosion of fly ash particles can not only has high corrosion resistance, high temperature is used in metallurgical industry, wear-resisting environment ideal temperature sensor.

material:

K1320 heat-resistant wear-resistant alloy temperature: 0 ~ 1200 ℃

3, high temperature alloy wear-resistant, using special heat-resistant and wear-resistant alloys as outside temperature protection tube, built-in armored core body, both has the high of particle erosion corrosion resistance, high temperature is used in metallurgical industry, wear-resisting environment ideal temperature sensor

material: 3 yc52 or GH3030 heat resistant alloy

temperature: 0 ~ 1200 ℃

4, iron and aluminum ceramic protection tube

iron base containing aluminum and cleverly add A12O3 powder, iron and aluminum porcelain was ( TLC） Special gold, iron and aluminum alloy porcelain made thermocouple ( Resistance) Protecting tube, become iron aluminum ceramic thermocouple (namely Resistance) The most critical parts - iron and aluminum ceramic protection tube. According to working temperature, wear condition, the type of medium, pressure equation, made into different series of iron and aluminum ceramic protection tube, the existing series: TLC, TLC1, TLC2, TLC3, TLC4 and TLC5 six big series.

TLC type: resistance to hydrochloric acid, nitric acid, sulfuric acid, sodium hydroxide, potassium hydroxide solution. Working temperature is divided into 350 & deg; C, 750度; Two kinds of C.

TLC1 type: resistance to oxidation, sulfide, resist the corrosion of zinc vapor, has high wear resistance, good thermal shock resistance and working temperature 1100 & deg; C。 Through actual use in zinc concentrate fluidized bed life 4 months, in pyrite, fluidized bed life 12 months in a fluidized bed and circulating fluidized bed boiler furnace service life of 6 months, in the import and export service life of 6 - ball mill, fan mill 8 months.

TLC2 type: working temperature 1250 & deg; C, wear-resisting performance is lower than TLC1 type, compared with ceramic tube thermal shock resistance, high temperature hot strong sex, the working pressure, 16 mpa technology indexes such as lead, especially suitable for 1250 & deg; C indexing number S thermocouple protection tube.

TLC3 type: type by TLC2 improvement, TLC2 model characteristics, has improved especially in the wear-resisting performance, under the same conditions, can improve the life of two times. Working temperature of 1300 & deg; C。

TLC4 type: type TLC1 will then have it TLC1 model characteristics, has improved especially in the wear resistance, much higher than TLC1 type, under the same conditions, can improve the life of three times the working temperature of 1100 & deg; C。 Through actual use, import and export temperature measurement in the ball mill with protecting tube life up to 36 months.

in order to prevent the harmful gas into the thermocouple protection tube, common type terminal box outlet holes and spare gaskets and gasket to seal the lid.