Monitoring device and method for total hydrocarbon concentration in high-hydrocarbon waste gas

Abstract

The invention relates to a monitoring device and method for total hydrocarbon concentration in high-hydrocarbon waste gas and mainly solves the problems that in the prior art, response speed is slow, a monitoring range is small and high-concentration hydrocarbon-containing gas impact is difficult to respond. According to the monitoring device and method for the total hydrocarbon concentration in the high-hydrocarbon waste gas, a high-hydrocarbon waste gas sample is sucked by a sampling pump along a gas pipeline and then is divided into two paths to pass through a ten-way valve to enter a flame ionization detector; a valve location (1) of the ten-way valve is connected with a carrier gas inlet, a valve location (4) and a valve location (8) are each connected with a sample gas inlet, a valve location (3) and a valve location (9) are connected with a sample gas outlet, a sampler outlet is connected with the flame ionization detector, a valve location (7) and a valve location (10) are connected with a quantitative pipe, and a valve location (2) and a valve location (5) are connected with the other quantitative pipe with the same volume. By means of the technical scheme, the problems can be better solved. The monitoring device and method can be applied to monitoring the total hydrocarbon concentration in the high-hydrocarbon waste gas.

Description

technical field [0001] The invention relates to a device and a method for monitoring the concentration of total hydrocarbons in waste gas containing high hydrocarbons. Background technique [0002] During the treatment of high hydrocarbon-containing waste gas in petrochemical and other industries, for the safety of the treatment device, it is necessary to obtain the total hydrocarbon concentration of the gas quickly and accurately. When the total hydrocarbon concentration in the monitored waste gas exceeds the lower explosion limit (5% VOL, calculated as methane ) or a set concentration value, it provides a timely early warning signal for subsequent processing facilities, so that the processing device can take safety measures such as dilution or shutdown. Considering the flow velocity of exhaust gas in the gathering pipeline and processing device, the response time of the monitoring system is required to be less than 5 seconds. At present, the common on-line total hydrocarb...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the response speed is slow, the monitoring range is small, and it is difficult to cope with the impact of high-concentration hydrocarbon-containing gas in the prior art. A new monitoring device and method for total hydrocarbon concentration in high-hydrocarbon-containing waste gas is provided

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