On-line detection device and detection method for natural hydrogen sulfide and thiophane content

Abstract

The invention discloses an on-line detection device and detection method for natural hydrogen sulfide and thiophane content. The on-line detection device comprises a main pipeline and a processor (6),wherein a front gas switching valve (9) and a rear gas switching valve (20) are respectively arranged at two ends of the main pipeline, a front detector (11), a hydrogen sulfide absorption module (14) and a rear detector (16) are sequentially arranged on the main pipeline from the front gas switching valve (9) to the rear gas switching valve (20), a natural gas entering pipeline (8) and an air entering pipeline (10) are connected to the front gas switching valve (9), an air discharging pipeline (17) and a natural gas discharging pipeline (19) are connected to the rear gas switching valve (20), and the processor (6) is connected with the front gas switching valve (9), the front detector (11), the rear detector (16) and the rear gas switching valve (20). The on-line detection device and method has good selectivity and high accuracy and is convenient to install and maintain, and real-time monitoring can be achieved.

Description

technical field [0001] The invention relates to the technical field of natural gas detection, in particular to an online detection device and detection method for the content of hydrogen sulfide and tetrahydrothiophene in natural gas. Background technique [0002] With the rapid development of urban gas business, more and more attention has been paid to the safety of gas. As urban gas, natural gas is flammable, explosive and toxic. In a relatively closed gas environment, once gas leakage occurs, it is very easy to cause Accidents such as gas poisoning and explosions pose threats to personal and public safety. Due to the colorless and odorless nature of natural gas, in order to prevent and reduce the occurrence of vicious accidents such as poisoning and explosions that cannot be detected in time due to gas leakage, my country's industry standard CJJ 148-2010 "Technical Regulations for Odorization of Town Gas" requires that town gas must be added Smelly. Tetrahydrothiophene h...

AI Technical Summary

Problems solved by technology

Its advantages are: small size, fast detection speed, etc. The disadvantages are: large measurement error, poor selectivity to the measurement gas, and cross-reaction to other gases

Its disadvantages are: this detection method needs to purchase a pulsed flame photometric detector (not produced in China), the price is relatively high, and there are still some difficulties in popularization

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