Apparatus of measuring power station boiler furnace gas temperature and measuring method thereof

Abstract

An apparatus of measuring power station boiler furnace gas temperature and a measuring method thereof, which belong to the thermal power technology field, are disclosed. The apparatus comprises: a high temperature resistant ceramic sampling tube, a water-cooled pipe heat exchanger, an air inducing apparatus, temperature, pressure and flow measuring components, a digital to analog converter, and a data processing computer. The high temperature resistant ceramic sampling tube forms a sealing connection with a water-cooled pipe heat exchanger a screw mouth. A cooling water honeycomb duct forms a sealing connection with the pipe heat exchanger. The air inducing apparatus is arranged in the position of a pipe heat exchanger gas exit and is used as a power supply for gas flow. The temperature measuring component, the pressure measuring component and the flow measuring component are respectively arranged in the positions of exits and entrances of a gas pipe and the cooling water duct of the water-cooled pipe heat exchanger, and acquisition data is output to a control module to be recorded. In the invention, based on a water-cooled pipe heat exchanger principle, heat exchange between a little constant volume gas in a furnace and the cooling water is used and a real time temperature of the gas in the furnace can be obtained by inversely analyzing cooling water heat variation and the heat of the tail gas.

Description

technical field [0001] The invention relates to a device in the technical field of thermal power generation, in particular to a device for measuring flue gas temperature in a boiler furnace of a power station and a method for measuring the temperature. Background technique [0002] my country's thermal power generation accounts for three-quarters of the total power generation, and coal-fired boilers account for more than 80% of thermal power plants. The temperature of the high-temperature flue gas generated by the combustion of the boiler furnace is generally between 900-1000°C. Ordinary contact temperature sensors such as thermocouples are difficult to withstand the long-term erosion of solid particles in the high-temperature flue gas, have poor durability and high maintenance costs. Non-contact boiler furnace flue gas temperature measurement devices include radiation pyrometers, infrared thermal imaging cameras, etc., but the measurement results can only reflect the projec...

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Problems solved by technology

The camera calculates the three-dimensional temperature field in the furnace by receiving radiation information from the furnace; however, this technology is based on radiation information for measurement and cannot reflect the precise temperature of the high-temperature flue gas in the boiler, and it is necessary to install cameras and devices at different positions of the boiler The lack of durability and high maintenance cost are the bottlenecks restricting its widespread use.

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