Water-cooling fly ash sampling device of circulating fluid bed boiler

Abstract

The invention relates to a water-cooling fly ash sampling device of a circulating fluid bed boiler, which comprises a sampling gun (17). The water-cooling fly ash sampling device of the circulating fluid bed boiler has the structure that the front end of a sampling tube (7) is connected with a sampling head (2), the sampling head (2) is provided with a fume inlet and is communicated with a tube cavity of the sampling tube (7), the back end of the sampling tube (7) is provided with a sampling barrel (12) used for holding sampled fly ash and a sampling connection tube (13), a back tube (16) is penetrated into the sampling tube, and the back end of the back tube (16) is connected with a pressure difference measurement device. The water-cooling fly ash sampling device of the circulating fluidbed boiler is characterized in that a water-cooling sleeve tube used for the passing of cooling water is sleeved outside of the sampling tube (7), and an inlet and an outlet of the cooling water of the sampling tube (7) are arranged at the back end of the water-cooling sleeve tube. Because the water-cooling tube is arranged outside the sampling tube of the sampling gun, the sampling device can work under a fume environment of 1100 DEG C and can sample the fly ash at constant speed aiming at different boiler loads and fume flow speeds and temperatures; the sampling head at the head part of thesampling gun can select the fly ash according to the actual fly ash concentration, an air exhaust blower and a flow rate regulation device which are arranged at the tail part of the sampling gun can regulate the flow rate, and approximately constant-speed sampling is realized.

Description

technical field [0001] The invention relates to a circulating fluidized bed boiler fly ash sampling device, in particular to a circulating fluidized bed boiler cyclone separator inlet and outlet high-temperature flue gas environment for sampling fly ash sampling device. Background technique [0002] Circulating fluidized bed technology is a high-efficiency and low-pollution combustion technology. In recent years, a large number of large-scale power station circulating fluidized bed boilers have been put into commercial operation. Since this technology is a new technology, people do not have a deep understanding of its operating characteristics. At present, there are few domestic and foreign experiences on the operation optimization of large circulating fluidized bed boilers that can be used for reference, which cannot play a role in guiding operation. Therefore, it is necessary to carry out Experimental research on the overall operating characteristics and combustion adjustm...

AI Technical Summary

Problems solved by technology

[0004] The above sampling device can only sample the fly ash at the tail of the boiler at a constant velocity, that is, it can only work in the flue gas environment of no more than 400 °C, and the fly ash at the inlet and outlet of the cyclone separator is at a constant velocity of up to 1100 °C in the flue gas environment. sampling, a new fly ash sampling device must be redeveloped

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