Intelligent online isokinetic sampling equipment

Abstract

The invention discloses intelligent online isokinetic sampling equipment, comprising a sampling nozzle, a sampler, a condenser, a cyclone separator, an instrument transmitter and a data collecting and processing system. Sampling isokinetic property is achieved by a static pressure balance principle; a calibrated filter cylinder in the sampler is utilized as a filter component; and static pressure at two ends of the filter cylinder is led to a precise differential pressure transmitter to display and output the differential pressure, so as to achieve measurement of instantaneous concentration of dust contained in the smoke. The efficient cyclone separator arranged behind the condenser can effectively protect subsequent precision equipment; and the service life of the equipment is prolonged. Various parameters are led to the data collecting and processing system; and the required data of a user can be obtained in real time.

Description

technical field [0001] The invention relates to an intelligent on-line isokinetic sampling device for collecting flue gas in a flue of a catalytic cracking device in the petroleum refining industry. Background technique [0002] The dust contained in the flue gas entering the flue gas turbine in the catalytic cracking unit of the petroleum refining industry will cause huge damage to the flue gas turbine and seriously reduce its service life. The three-stage cyclone separator is placed before the flue gas turbine to separate the dust from the flue gas entering the flue gas turbine to ensure the normal operation of the flue gas turbine. It is very important to use sampling equipment to collect the dust in the dust-laden flue gas in the flue after the three-stage cyclone separator to obtain its dust concentration and dust particle size. The traditional equipment used for isodynamic sampling of the flue gas in the flue after the three-stage cyclone separator realizes the isokin...

AI Technical Summary

Problems solved by technology

This kind of sampling has the following problems: one is that the flue gas concentration is obtained by dividing the mass difference before and after filtering by the filter cartridge by the flue gas flow rate flowing through the filter cartridge. In order to reduce the error, it takes a long time to sample (generally 6 -8 hours), and what is obtained is only the average concentration within the sampling time, and the instantaneous concentration cannot be obtained; the second is that the cooling water produced after the high-temperature flue gas flows through the cooler only undergoes inertial separation once, and the separation efficiency is poor. Unseparated cooling water will cause great damage to subsequent equipment, and its life will be reduced sharply; third, the operation of the entire equipment, including data recording and calculation, is done manually by the operator, which is very inconvenient and cannot be real-time get the desired result

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