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The temperature measurement device type
Author:本站  From:网络  Click:2519 times  Update:2010-6-7

 

The temperature measurement device type

1, overview

    In order to open the black iron blast furnace in pay a long-term unremitting efforts, the measurement of the temperature of furnace laryngeal gas temperature measurement device. Through the throat of blast furnace gas temperature measurement, the operator provided for blast furnace smelting, to improve understanding of the important basis of blast furnace operation. But due to the existing cross device inherent defect in blast furnace operator to obtain the accurate, long-term continuous smelting furnace, thereby affecting the information. Therefore, always eager to ironmaking workers, the improvement of the existing temperature measurement device.

2 the temperature measurement device, existing

     Currently, the measurement of the temperature of the gas stove throat temperature measurement device to basically have two kinds:

     Based on the result of technical center as a representative of the temperature measurement device without water. It adopts composite tubular steel structure housing, in which set temperature measurement with thermocouples.

     Another kind is sichuan metallurgical equipment development company as a representative of the water temperature measurement device. The Through the water-cooling greatly reduce the device, thus ensuring the body temperature measurement device used in high temperature environment of strength, prolong service life. This temperature measurement device adopts steel welding of ontology, its inner shell steel welding constitute cooling water tank, temperature measurement thermocouple placed between cooling water tank.


     Two kinds of devices used the temperature measurement results: no water temperature measurement device, the body temperature is higher, low temperature strength, Due to the high temperature coal gas stove, sprinkling device ontology in alternating frequent thermal shock environments less than 1 year began to fracture and failure, Water-cooling cross temperature measurement device used in investment, in a very short time (usually less than six months), appear slack inconvenience to repair water supply interruption, then evolved into no water temperature measurement device. The

     Therefore, to maintain good cooling temperature measurement device is the use effect of the key or optimal or bad. But the existing water-cooling cross temperature measurement device is hard to overcome the defects exist in its structure, the existing water temperature measurement device. The

 


      Existing water-cooling cross temperature measurement device easily leak

   1), weld long (tank welding line 10, the total length of more than 60 meters), it is hard to guarantee the quality of welding. Any one of the welding defects will inevitably cause water is leaking.

   2), tank section, specially long weld. During the welding process, the long strips tank by a lot of heat without bending deformation. In the process, the correction with steel welding between will be pulled out tiny cracks, resulting in water is leaking.

   3), by several pieces of steel welding of cooling water tank, directly under the burden of the burden, blow make cistern deformation of tension between the plate and make welding cracks caused water is leaking


   4), stress corrosion is leaking. Due to a long, WenQi measured after welding, do not facilitate annealing process of welding to eliminate the thermal stress, Even manufacturing process removes the thermal stress, but due to excessive seam in frequent thermal shock environments and to generate heat stress. While water tank in certain direct exposure to the steam + + hydrogen chloride as high temperature coal gas corrosive medium environment, especially in the circumstances. In hot water with certain temperature stress and the corrosive medium under the function of the plate and water, especially between welding stress corrosion and rupture is leaking. Stress corrosion phenomena is relatively complex, when stress does not exist, corrosion slowly, When stress and reached a certain level, will not corrode metal in serious condition, the rupture failure is fragile, no apparent signs.

   5), cistern, a sharp horns inferior in this area, cooling, heat exchanger stagnation will. Due to the high temperature air directly exposed in the water, in case the abnormal smelted ininduction parts for local overheating and was burnt out. Even for rectangular, cooling water tank on its horns can produce stagnation. Therefore tank corner is often burn leakage.

     In spite of the existing water temperature measurement device in the formation, increase the cooling of the double inlet dual structure, even though water than before, but the inherent factor in tank leakage still exist.

     Existing water temperature measurement device cross cannot replace. Thermocouple

     Because of the temperature measurement device existing thermocouple protection catheter ends must bend, can make thermocouple temperature sensing gas temperature. In use process, thermocouple easily damaged, damage from the thermocouple protection catheter remoal of only, but new thermocouple cannot install place, only to protect the catheter ends curved areas. Then the measurement of the temperature without any representative, even the temperature measuring devices not only is a leaking damage.

 

3, temperature measurement device type water-cooling cross

     Visible transformation existing water temperature measurement device, overcome cross the easy replacement cannot leak and thermocouple defects, make its life extension, it is undoubtedly multiple one of blast furnace operation.

     The new type water-cooling device in the temperature of the existing water based on the temperature, water-cooled function, but was revised, structure for temperature measurement device type water-cooling cross. Compared with existing equipment, new water temperature measurement device has the following the main advantages:

    (1) new water temperature measurement device will cross WenQi in water pipe, through high thermal conductive materials will be measured absorbs heat transfer WenQi enclosure for cooling water discharge, effectively reduce the temperature measurement WenQi ontology.

    (2) new water temperature measurement device will cross cooling tube set inside, and water-cooling pipes for seamless steel tube, welding, so only end of cooling water, WenQi reliable seal not leak.

    (3) due to temperature measurement device type water-cooling cross the shell and tube can be cooled by three pillars of seamless steel tube with circle of WenQi measurement of cooling is uniform, not caused by uneven cooling bending.

    (4) new water temperature measurement device thermocouple to cross. Due to the thermocouple catheter in WenQi inside decorate a straight-line measurement, easy installation and removal of thermocouples.

 

       To sum up, the temperature measurement device type water-cooling overcome existing water temperature measurement device to the thermocouple cannot change etc, leaking defect structure, life can be doubled.