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CN-122016447-A - Purging and trapping system

CN122016447ACN 122016447 ACN122016447 ACN 122016447ACN-122016447-A

Abstract

The application discloses a purging and trapping system, and relates to the technical field of water analysis. The purging and trapping system comprises a blowing pipeline, a purging device, a first reversing device, a first trapping well, a first decoupling pipe, a first sampling pipe, a second reversing device, a second trapping well, a second decoupling pipe, a second sampling pipe and a first emptying pipe. By switching the states of the first reversing device and the second reversing device, gas trapping and desorption sampling can be performed by using the first trapping well, gas trapping can be performed synchronously by using the first trapping well and the second trapping well, and desorption sampling can be performed respectively. The purging and trapping system can be respectively connected with two gas analysis instruments, so that one water body sample can be utilized to meet different detection requirements, the water body sample is saved, and the detection efficiency is improved. When high-concentration sample analysis is performed, the high-concentration sample can be captured and respectively injected by being split into two capture traps, so that the high-concentration sample is prevented from polluting an injection flow path.

Inventors

  • LV MINGZHU
  • YIN BO
  • ZHOU WENXIU
  • MA QIAO
  • LIU LIPENG
  • HAN SHUANGLAI

Assignees

  • 杭州谱育科技发展有限公司

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The purging and trapping system is characterized by comprising a blowing pipeline (100), a purging device (200), a first reversing device (310), a first trapping well (320), a first decoupling pipe (350), a first sampling pipe (360), a second reversing device (410), a second trapping well (420), a second decoupling pipe (430), a second sampling pipe (440) and a first emptying pipe (500), wherein the blowing pipeline (100) is communicated with an inlet of the purging device (200), an outlet of the purging device (200), the first trapping well (320), the first decoupling pipe (350), the first sampling pipe (360) and the first emptying pipe (500) are all connected with the first reversing device (310), and a pipeline between the first trapping well (320) and the first reversing device (310) is communicated with the second reversing device (410) through a branching pipe (370), and the second trapping well (420), the second decoupling pipe (430), the second sampling pipe (440) are all communicated with the second reversing device (410) and the second reversing device (410); When the first reversing device (310) is in the first state, the first trap (320) can trap the gas from the purging device (200), and when the first reversing device (310) is in the second state, the gas from the first desorption tube (350) can sequentially pass through the first reversing device (310), the first trap (320), the first reversing device (310) and the first sampling tube (360) to sample the gas analysis instrument; The second trap (420) can trap the gas from the branch pipe (370) when the second reversing device (410) is in the first state, and the gas from the second desorption pipe (430) can sequentially pass through the second reversing device (410), the second trap (420), the second reversing device (410) and the second sampling pipe (440) to sample the gas analysis instrument when the second reversing device (410) is in the second state.
  2. 2. The purge and trap system according to claim 1, wherein the first reversing device (310) is a six-way reversing valve, the outlet of the purge device (200), the first emptying pipe (500), the first end of the first trap (320), the second end of the first trap (320), one end of the first decoupling pipe (350), one end of the first intake pipe (360) are connected with six ports of the first reversing device (310), respectively, the upstream end of the diverting branch pipe (370) is connected in a pipeline between the first end of the first trap (320) and the first reversing device (310); The second reversing device (410) is a six-way reversing valve, and the branch pipe (370), the first emptying pipe (500), the first end of the second trapping well (420), the second end of the second trapping well (420), one end of the second decoupling pipe (430) and one end of the second sampling pipe (440) are respectively connected with six ports of the second reversing device (410).
  3. 3. The purge and trap system according to claim 2, wherein a water trap (340) is provided on the line between the first end of the first trap (320) and the first reversing device (310), and the water trap (340) is located between the upstream end of the shunt branch (370) and the first reversing device (310).
  4. 4. The purge and trap system according to claim 2, wherein a first solenoid valve (330) is provided on the line between the first end of the first trap (320) and the first reversing device (310), and the first solenoid valve (330) is located between the upstream end of the shunt branch (370) and the first trap (320).
  5. 5. The purge and trap system according to claim 1, wherein a proportional valve (371) is provided on the shunt branch (370), the purge and trap system further comprising a second emptying pipe (450), an upstream end of the second emptying pipe (450) being connected to the shunt branch (370) between the proportional valve (371) and the second reversing device (410).
  6. 6. The purge and trap system according to claim 5, wherein a second solenoid valve (510) is provided on the first evacuation pipe (500), and a third solenoid valve (451) is provided on the second evacuation pipe (450).
  7. 7. The purge and trap system according to claim 1, wherein a proportional valve (371) and a flow sensor (372) are provided on the branch pipe (370), the flow sensor (372) being electrically connected to the proportional valve (371).
  8. 8. The purge and trap system of claim 1, wherein at least one of the first sampling tube (360) and the second sampling tube (440) is connected to at least two sampling branches, each for connecting to a gas analysis instrument.
  9. 9. The purge and trap system of claim 8, wherein a fourth solenoid valve (362) is provided on each of the sample injection branches.
  10. 10. The purge and trap system according to claim 9, wherein at least one of the sample injection branches is provided with a flow control module.

Description

Purging and trapping system Technical Field The application relates to the technical field of water analysis, in particular to a purging and trapping system. Background When analyzing the components of the water body, volatile substances in the water body are blown out in a purging mode, then the volatile substances pass through the trap, the components to be detected are complemented by the trap, then the complemented substances of the trap are desorbed, and then the materials are sent into a gas analysis instrument for detection, so that the types and the contents of the volatile substances in the water body are determined. The purge and trap is used as pretreatment sampling equipment, and the whole sampling flow path is easy to pollute when high-concentration sample analysis is carried out. When analyzing samples with unknown concentration, the samples need to be diluted step by step, which is time-consuming and complicated in process. Especially when quantification of the sample is required, and the diluted concentration is not in the linear range, the whole analysis process must be restarted, and the workload is huge. When analyzing unknown samples, multiple analysis components are expected as much as possible, different trap traps are needed to grasp different types of components, but the existing purging trap system can only be configured with one trap, so that if different trap traps are needed, sample preparation can be performed for multiple times, redundant workload is increased, and when the sample amount is insufficient, analysis cannot be performed. Disclosure of Invention The application aims to provide a purging and trapping system which can synchronously trap a water body sample by using double channels and can be connected with two gas analysis instruments to meet analysis requirements in some scenes. Embodiments of the application may be implemented as follows: The application provides a purging and trapping system, which comprises a blowing pipeline, a purging device, a first reversing device, a first trapping well, a first desorption pipe, a first sampling pipe, a second reversing device, a second trapping well, a second desorption pipe, a second sampling pipe and a first emptying pipe, wherein the blowing pipeline is communicated with an inlet of the purging device; the second trapping well, the second desorption pipe and the second sampling pipe are communicated with a second reversing device; the first reversing device and the second reversing device both have a first state and a second state; When the first reversing device is in a second state, the gas from the first desorption pipe can sequentially pass through the first reversing device, the first trapping well, the first reversing device and the first sampling pipe to sample the gas analysis instrument; When the second reversing device is in the second state, the gas from the second desorption pipe can sequentially pass through the second reversing device, the second trapping well, the second reversing device and the second sampling pipe to sample the gas analysis instrument. In an alternative embodiment, the first reversing device is a six-way reversing valve, and the outlet of the purging device, the first emptying pipe, the first end of the first trapping well, the second end of the first trapping well, one end of the first decoupling pipe and one end of the first sampling pipe are respectively connected with six ports of the first reversing device, and the upstream end of the diversion branch pipe is connected in a pipeline between the first end of the first trapping well and the first reversing device; The second reversing device is a six-way reversing valve, and the split branch pipe, the first emptying pipe, the first end of the second trap, the second end of the second trap, one end of the second decoupling pipe and one end of the second sampling pipe are respectively connected with six ports of the second reversing device. In an alternative embodiment, a water trap is provided on the line between the first end of the first trap and the first reversing device, and the water trap is located between the upstream end of the shunt branch and the first reversing device. In an alternative embodiment, a first solenoid valve is provided on the line between the first end of the first trap and the first reversing device, and the first solenoid valve is located between the upstream end of the shunt branch and the first trap. In an alternative embodiment, the split branch pipe is provided with a proportional valve, and the purge-and-trap system further comprises a second emptying pipe, and an upstream end of the second emptying pipe is connected to the split branch pipe between the proportional valve and the second reversing device. In an alternative embodiment, a second solenoid valve is provided on the first evacuation tube and a third solenoid valve is provided on the second evacuation tube. In an alternative embodiment, the dive