Soil VOCs detection system and detection method
The invention discloses a soil VOCs detection system and detection method, a carrier gas channel is arranged in a detection drill bit, a gas inlet is formed in the side wall of the carrier gas channel, a valve is arranged at the gas inlet, a carrier gas supply device introduces carrier gas into the...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a soil VOCs detection system and detection method, a carrier gas channel is arranged in a detection drill bit, a gas inlet is formed in the side wall of the carrier gas channel, a valve is arranged at the gas inlet, a carrier gas supply device introduces carrier gas into the carrier gas channel through the carrier gas inlet, and the carrier gas supply device supplies carrier gas into the carrier gas channel through the carrier gas inlet. A vacuum pump forms negative pressure in the carrier gas channel through the carrier gas outlet, a heating device heats the surrounding of the detection drill bit, and a detection device detects VOCs gas in gas exhausted through the carrier gas outlet; gas formed after VOC pollutants in soil are heated and evaporated diffuses into the carrier gas channel, then carrier gas in the carrier gas channel is sent out through the carrier gas outlet by means of the carrier gas, intermittent gas inlet and carrier gas conveying are achieved through work of the va |
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