Online continuous monitoring system and method for aldehyde ketone compounds in gas

Abstract

The invention provides an on-line continuous monitoring system and method for aldehyde ketone compounds in gas. The on-line continuous monitoring system comprises a detection unit, the bearing piece is arranged on the base and is driven by the driving module to rotate; m groups of working units are included, M is an integer not less than 1, each group of working units comprises P working units, and P is an integer not less than 3; the working unit is arranged on the bearing piece; during rotation of the bearing part, each working unit is sequentially located at a preparation working position, a sampling working position and a detection working position; the preparation flow path is arranged at a preparation working position, the sampling flow path is arranged at a sampling working position, and the detection flow path is arranged at a detection working position; the control device is used for controlling whether the working unit in the preparation working position enters the preparation flow path or not, whether the working unit in the sampling working position enters the sampling flow path or not and whether the working unit in the detection working position enters the detection flow path or not. The method has the advantages of high working efficiency, accurate analysis result and the like.

Description

technical field

[0001] The invention relates to gas monitoring, in particular to an online continuous monitoring system and method for aldehyde and ketone compounds in gas. Background technique

[0002] At present, the sampling and analysis methods and related standards of aldehydes and ketones are mainly based on off-line sampling methods. For example, in the national standard HJ683-2014, it is stipulated that after off-line sampling is carried out using DNPH-silica gel adsorption tubes, the samples are transferred to the laboratory for high-performance liquid chromatography. Perform analytical testing. This offline working method has many disadvantages, such as:

[0003] 1. It is greatly affected by human factors, and the storage and transportation requirements of samples are high;

[0004] 2. The cost of consumables and manual analysis is high, which is not conducive to the realization of long-term high-frequency observations, and cannot meet the current requirements fo...

Examples

Embodiment 1

[0040] figure 1 The structure diagram of the online continuous monitoring system of aldehyde and ketone compounds in the gas of the embodiment of the present invention is given, as figure 1 Shown, the online continuous monitoring system of aldehyde and ketone compound in the described gas comprises:

[0041] A detection unit, such as a liquid chromatography detection unit;

[0042] A base, a carrier 41 and a drive module, the carrier 41 is arranged on the base and rotates driven by the drive module;

[0043] M groups of work units, M is an integer not less than 1, each group of work units includes P work units, P is an integer not less than 3, such as the first work unit 21, the second work unit 22 and the third work unit 23; The working unit is arranged on the carrier 41, and the working unit includes a silica gel column with openings at both ends; during the forward or reverse rotation of the carrier 41, when any group of working units While one of the working units is in...

Embodiment 2

[0076] An application example of the online continuous monitoring system and method for aldehydes and ketones in gas according to Example 1 of the present invention in air monitoring.

[0077] In this application example, if figure 1 As shown, the carrier 41 adopts a disc, and the through holes are evenly arranged on the circumference of the disc; a group of work units is set on the carrier 41, and the only group of work units includes three work units, and the three work units ( The first working unit 21, the second working unit 22 and the third working unit 23) are arranged in the through holes respectively, and the central angle corresponding to the adjacent working units is 120 degrees; The end is open; the drive module adopts a motor, which is used to drive the bearing member 41 to rotate;

[0078] In the control device, the first moving part and the second moving part are respectively disc-shaped and arranged on the vertical guide rail, and the driving unit adopts a mot...

Embodiment 3

[0097] According to the application example of the online continuous monitoring system and method of aldehydes and ketones in the gas of Embodiment 1 of the present invention in air monitoring, the difference from Embodiment 2 is:

[0098] like image 3 As shown, there are two groups of work units, each group of work units includes three work units, the first group of work units includes the first work unit 21, the second work unit 22 and the third work unit 23, and the second group of work units includes the first work unit Four working units 27, the fifth working unit 28 and the sixth working unit 29, the six working units of the two groups of working units are evenly arranged on the entire circumference of the carrier 41, and the central angle corresponding to the adjacent two working units is 60° degree; corresponding to the two groups of working units, the first preparation flow path 11 and the second preparation flow path 12 are respectively in the preparation work posit...

technical field

[0001] The invention relates to gas monitoring, in particular to an online continuous monitoring system and method for aldehyde and ketone compounds in gas. Background technique

[0002] At present, the sampling and analysis methods and related standards of aldehydes and ketones are mainly based on off-line sampling methods. For example, in the national standard HJ683-2014, it is stipulated that after off-line sampling is carried out using DNPH-silica gel adsorption tubes, the samples are transferred to the laboratory for high-performance liquid chromatography. Perform analytical testing. This offline working method has many disadvantages, such as:

[0003] 1. It is greatly affected by human factors, and the storage and transportation requirements of samples are high;

[0004] 2. The cost of consumables and manual analysis is high, which is not conducive to the realization of long-term high-frequency observations, and cannot meet the current requirements fo...

Examples

Embodiment 1

[0040] figure 1 The structure diagram of the online continuous monitoring system of aldehyde and ketone compounds in the gas of the embodiment of the present invention is given, as figure 1 Shown, the online continuous monitoring system of aldehyde and ketone compound in the described gas comprises:

[0041] A detection unit, such as a liquid chromatography detection unit;

[0042] A base, a carrier 41 and a drive module, the carrier 41 is arranged on the base and rotates driven by the drive module;

[0043] M groups of work units, M is an integer not less than 1, each group of work units includes P work units, P is an integer not less than 3, such as the first work unit 21, the second work unit 22 and the third work unit 23; The working unit is arranged on the carrier 41, and the working unit includes a silica gel column with openings at both ends; during the forward or reverse rotation of the carrier 41, when any group of working units While one of the working units is in...

Embodiment 2

[0076] An application example of the online continuous monitoring system and method for aldehydes and ketones in gas according to Example 1 of the present invention in air monitoring.

[0077] In this application example, if figure 1 As shown, the carrier 41 adopts a disc, and the through holes are evenly arranged on the circumference of the disc; a group of work units is set on the carrier 41, and the only group of work units includes three work units, and the three work units ( The first working unit 21, the second working unit 22 and the third working unit 23) are arranged in the through holes respectively, and the central angle corresponding to the adjacent working units is 120 degrees; The end is open; the drive module adopts a motor, which is used to drive the bearing member 41 to rotate;

[0078] In the control device, the first moving part and the second moving part are respectively disc-shaped and arranged on the vertical guide rail, and the driving unit adopts a mot...

Embodiment 3

[0097] According to the application example of the online continuous monitoring system and method of aldehydes and ketones in the gas of Embodiment 1 of the present invention in air monitoring, the difference from Embodiment 2 is:

[0098] like image 3 As shown, there are two groups of work units, each group of work units includes three work units, the first group of work units includes the first work unit 21, the second work unit 22 and the third work unit 23, and the second group of work units includes the first work unit Four working units 27, the fifth working unit 28 and the sixth working unit 29, the six working units of the two groups of working units are evenly arranged on the entire circumference of the carrier 41, and the central angle corresponding to the adjacent two working units is 60° degree; corresponding to the two groups of working units, the first preparation flow path 11 and the second preparation flow path 12 are respectively in the preparation work posit...

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