| 摘要 |
The present invention relates to an on-line analyzer for VOCs in gas and method of using the same, comprising: a sampling device (1), an gas-supply device (2) and a refrigerating device (3) connected to the sampling device (1) and the gas-supply device (2) respectively; the on-line analyzer for VOCs in gas with two cryo-focuses in empty tubes and two detectors also comprises a gas flow control device (4) connected to the sampling device (1) and the gas-supply device (2) respectively, an analyzing device (5) connected to the gas flow control device (4), and a data acquisition and processing device connected to the analyzing device (5). Therefore, the present invention has a following advantage: the present invention runs automatically and continuously over a long period since it uses electronic refrigeration technique to achieve cryo-refrigeration, instead of using liquid nitrogen refrigeration technique which needs frequent addition of liquid nitrogen and limits application conditions. |
| 主权项 |
1. An on-line analyzer for VOCs in gas comprising:
a sampling device; a gas-supply device; and a refrigerating device connected to the sampling device and the gas-supply device respectively, wherein the on-line analyzer for VOCs uses two cryo-focuses in empty tubes and two detectors, also comprises:
a gas flow control device connected to the sampling device and the gas-supply device respectively;an analyzing device connected to the gas flow control device; anda data acquisition and processing device connected to the analyzing device, wherein the sampling device comprises:
a 6-way valve; anda filter, an inlet tube for internal standards, an inlet tube for external standards, a first solenoid valve and a second solenoid valve which are connected to the 6-way valve respectively,wherein the first solenoid valve is connected to the second solenoid valve, wherein the refrigerating device comprises:
a 12-way valve; anda first dewatering tube, a second dewatering tube, a first concentrating tube and a second concentrating tube connected to the 12-way valve respectively,wherein the first dewatering tube and the second dewatering tube are connected to the second solenoid valve simultaneously, wherein the refrigerating device also comprises a trapping tube for CO2, wherein the second dewatering tube is connected to the 12-way valve through the trapping tube for CO2, wherein the first dewatering tube, the second dewatering tube, the first concentrating tube and the second concentrating tube are disposed in a cryotrap. |
