Peroxide radical chemical amplification module

Abstract

The utility model discloses a peroxide radical chemical amplification module, which relates to the technical field of environmental air pollutant concentration monitoring and comprises a four-way valve, three gas storage tanks are arranged at the bottom end of the side surface of the four-way valve, and a source intensity three-way valve and a gas mixing three-way valve II are arranged at the top end of the four-way valve. A first gas mixing three-way valve is arranged on the side, away from the gas storage tank, of the bottom end of the four-way valve, and the first gas mixing three-way valve, the four-way valve, the source intensity three-way valve and the second gas mixing three-way valve are used for controlling circulation and entering of gas. According to the utility model, the flow of a detection instrument is directly controlled through an integral module to realize accurate flow control in sampling and amplification processes, and an experimenter is helped to carry out deeper research and analysis. The module is simple in structure, easy to operate, low in manufacturing cost and high in time resolution, and the inhibition effect of the environment humidity on the amplification reaction is achieved to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental air pollutant concentration monitoring technical field especially relates to a peroxide radical chemical amplification module. BACKGROUND

[0002] The peroxide radical chemical amplification module is a high-sensitivity device for measuring atmospheric peroxide radicals. The peroxide radicals are measured by chemical amplification method, and the peroxide radicals are made to have amplification cycle reaction with excessive NO and CO gas by being introduced into the reaction cavity. In this cycle reaction, the peroxide radicals convert NO into NO2, and at the same time, the peroxide radicals are reduced into other substances. Since the concentration of NO2 is relatively high and easy to measure, the concentration of peroxide radicals can be indirectly calculated by measuring the concentration of NO2.

[0003] In the existing peroxide radical chemical amplification module, due to the high activity, low concentration, short life and serious wall loss of total peroxide radicals in the atmosphere, it is difficult to realize direct measurement of free radicals in the measurement process. The absence of direct measurement means that we must rely on indirect methods, which may be affected by various factors such as reaction efficiency, selectivity, instrument error, etc., thereby affecting the accuracy of the final data.

[0004] To solve the problem of the influence of the above-mentioned indirect method on the accuracy of data, direct measurement method can be used for measurement. The direct measurement method is mass isolated electron spin resonance technology (MIESR), which can directly measure the concentration and characteristics of free radicals and avoid the errors and uncertainties that may be introduced in indirect measurement. Moreover, by directly observing the resonance signal of free radicals, the real state of free radicals in the atmosphere can be more accurately understood.

[0005] Although the direct measurement method solves the problem of the influence of the indirect method on the accuracy of data, the MIESR detection method has the problems of complex operation and low time resolution. The complexity of the MIESR technology may cause more difficulties for the experimenters in the execution process, and requires higher professional skills and longer training time. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the defects in the prior art and provides a peroxide radical chemical amplification module, which solves the problems of inaccurate measurement, complex operation and unstable operation in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a kind of peroxide radical chemical amplification module, including four-way valve, the side bottom end of the four-way valve is provided with three gas reservoir, the top end of the four-way valve is provided with source intensity three-way valve and gas mixing three-way valve door two, the bottom end of the four-way valve is provided with gas mixing three-way valve one away from the side of gas reservoir, and gas mixing three-way valve one, four-way valve, source intensity three-way valve and gas mixing three-way valve door two are used to control the flow and access of gas. By the multiple different connection modes of gas mixing three-way valve one, four-way valve, source intensity three-way valve and gas mixing three-way valve door two, different application scenarios and needs can be adapted to, to provide flexible control scheme.

[0009] As a further improvement of the utility model, the top end of the left gas reservoir is fixedly connected with a connecting pipe, one end of the connecting pipe away from the gas reservoir is fixedly connected to the side of the gas mixing three-way valve door two close to the gas reservoir, the middle gas reservoir is connected to the side of the four-way valve close to the gas reservoir through the connecting pipe, and the right gas reservoir is also connected to the side of the four-way valve close to the gas reservoir through the connecting pipe. More diversified fluid paths can be formed by the series combination of the connecting pipe to meet the complex fluid control requirements.

[0010] As a further improvement of the utility model, the top end of the four-way valve is connected to the bottom end of the gas mixing three-way valve door two through a connecting pipe, the side away from the gas reservoir of the four-way valve is also connected to the side of the gas mixing three-way valve one through a connecting pipe, and the right side of the gas mixing three-way valve door two is connected to the right side of the source intensity three-way valve through a connecting pipe. The side away from the source intensity three-way valve of the connecting pipe is fixedly connected with a temperature and humidity sensor. The temperature and humidity of peroxide radical can be controlled through the temperature and humidity sensor, the temperature and humidity of the detection environment can be accurately controlled, the influence of environmental factors on the detection result can be reduced, and the accuracy and reliability of the detection can be improved.

[0011] As a further improvement of the utility model, the top end of the temperature and humidity sensor is fixedly connected with a sample inlet rainproof structure, the bottom end of the temperature and humidity sensor is fixedly connected with a dry gas outlet, the bottom end of the dry gas outlet is fixedly connected with a nanometer pipe, the bottom end of the nanometer pipe is fixedly connected with a dry gas inlet, the gas mixing three-way valve one is fixedly connected to the bottom end of the dry gas inlet, the bottom end of the gas mixing three-way valve one is fixedly connected with a filter, and the side away from the gas mixing three-way valve one of the gas inlet is provided with a filtered gas outlet. Peroxide radical has certain harm to human health, such as inducing oxidative stress reaction, damaging cells and tissues, etc. The atmosphere containing peroxide radical is purified through the filter module, so as to reduce the risk of human exposure to these harmful substances and protect human health.

[0012] As a further improvement of the utility model, four connecting sleeves one are fixedly connected around the four-way valve, four connecting sleeves one are respectively sleeved outside four connecting pipes connected with the four-way valve, and the front face of the four-way valve is provided with a control knob one. Thus, the opening and closing of the four-way valve can be controlled at any time, the detection process can be more flexibly adjusted, and detection personnel can quickly switch different fluid paths according to actual needs, and selectively guide fluid to enter or leave the detection system. Such flexibility helps to cope with various complex detection scenarios, improves the adaptability and efficiency of detection.

[0013] As a further improvement of the utility model, connecting sleeves two are fixedly connected to three sides of the gas mixing three-way valve one, the source intensity three-way valve and the gas mixing three-way valve two, three connecting sleeves two are respectively sleeved outside connecting pipes connected with the gas mixing three-way valve one, the source intensity three-way valve and the gas mixing three-way valve two, and the front face of the gas mixing three-way valve one, the source intensity three-way valve and the gas mixing three-way valve two is provided with a control knob two. Thus, the opening and closing of the gas mixing three-way valve one, the source intensity three-way valve and the gas mixing three-way valve two can be controlled at any time.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The whole module of the utility model is composed of a sampling-amplification channel, an air path module and a collection control circuit module. The sampling-amplification channel is used for the reaction of peroxide radicals and NO. In the sampling-amplification channel, the airflow power is provided by the equipment detection instrument, so that the sampling and amplification process can be accurately controlled by directly controlling the flow of the detection instrument. When the background is measured, nitrogen gas not participating in the reaction is introduced from the upper end of the amplification channel, and when the reaction condition is measured, CO gas participating in and promoting the reaction is introduced from the upper end, so that the reaction is promoted to occur. Since the experimental conditions can be accurately controlled, the experimental results have high repeatability, which helps experimenters to carry out more in-depth research and analysis. Moreover, the module has simple structure, simple operation, low cost, high time resolution, and solves the inhibition of environmental humidity on the amplification reaction to a certain extent. A kind of measurement accurate, simple operation and stable operation is obtained. The simple module structure and simple operation enable the experimental personnel to quickly start, reduce the training time and cost.

[0016] 2、By the filter and the filtered air outlet, the atmosphere containing peroxy radicals is discharged through the filter and the filtered air outlet, so that the peroxy radicals and other harmful substances in the atmosphere can be removed by the filter, thereby reducing the emission of pollutants. This helps to improve air quality and reduce environmental pollution. Peroxy radicals in the atmosphere can react with other substances to generate secondary pollutants. Purifying the atmosphere containing peroxy radicals by the filter can prevent the generation of these secondary pollutants, further protecting the environment. Moreover, peroxy radicals have certain harm to human health, such as causing oxidative stress, damaging cells and tissues, etc. Purifying the atmosphere containing peroxy radicals by the filter can reduce the risk of human exposure to these harmful substances and protect human health. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the four-way valve of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the gas mixing three-way valve one, the source intensity three-way valve and the gas mixing three-way valve two of the utility model.

[0020] Figure 4 It is a structural schematic diagram of the utility model Figure 1 It is an enlarged structural schematic diagram of the A place in the utility model.

[0021] In the figure: 101, sample inlet rainproof structure; 102, temperature and humidity sensor; 103, nanometer tube; 104, dry gas inlet; 105, filter; 106, gas mixing three-way valve one; 107, four-way valve; 108, source intensity three-way valve; 109, gas mixing three-way valve two; 110, dry gas outlet; 111, connecting sleeve one; 112, control knob one; 113, connecting sleeve two; 114, control knob two; 115, air inlet; 116, filtered air outlet; 117, gas storage tank; 118, connecting pipe. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0023] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not meant to be limiting.

[0024] Referring to the drawings Figure 1 -attached Figure 4 The peroxide radical chemical amplification module comprises a temperature and humidity sensor 102, a nanometer pipe 103, a gas mixing three-way valve one 106, a four-way valve 107, a source intensity three-way valve 108, a gas mixing three-way valve two 109, a dry gas outlet 110 and a gas storage tank 117.

[0025] The chemical amplification module provided by the utility model is used for indirect monitoring of short-lived substances such as peroxide radicals in the atmosphere. The module is composed of a sampling-amplification channel, a gas path module and a collection control circuit module. In the sampling-amplification channel, sample gas enters a sampling pipe through a sampling port of a sampling port rainproof structure 101, participates in a chain cycle reaction with NO gas and CO gas in a nanometer pipe 103 cavity at a source intensity three-way valve 108 interface, fixes the free radical concentration as the NO2 concentration, mixes with N2 through a bottom gas mixing three-way valve one 106 of the nanometer pipe 103, enters an analyzer for determination through a filter 105 to eliminate residual peroxide radicals, and the process is a measurement mode. In the sampling-amplification channel, sample gas enters the sampling pipe through the sampling port of the sampling port rainproof structure 101, mixes with NO gas and N2 gas in the nanometer pipe 103 cavity at a gas mixing three-way valve two 109 interface, mixes with CO through a bottom three-way valve of the nanometer pipe 103, enters the analyzer for determination through the filter 105 to eliminate residual peroxide radicals, and the process is a reference mode. The content of peroxide radicals in the air can be inversely calculated by measuring the difference between the two modes. The module realizes indirect high-precision measurement of peroxide radicals through the ingenious design of the sampling-amplification channel and the reference channel. The difference between the two modes can accurately inversely calculate the content of peroxide radicals in the air, effectively avoids the interference of baseline drift and background signals, and improves the measurement accuracy.

[0026] The gas path module and the collection control circuit module are used for controlling the gas flow direction and the electric control program of the module system. The sampling-amplifying channel, the gas path module and the collection control circuit module can be connected with each other in structure and can use the sub-pipe as a reaction cavity. According to the free radical characteristics, the sub-pipe 103 can enable the peroxide free radical and CO and NO to perform a chain reaction in a relatively dry environment. Moreover, the module is provided with a module capable of quenching unreacted free radicals. The module is provided with a filter 105 at the bottom of the reaction cavity, and the unreacted peroxide free radical can collide and be quenched in the filter 105, so as to prevent the free radical from continuing to react with other reaction gases in the pipeline. The gas storage tank 117 containing the gas drying module is used as a gas source, dry air with a dew point of-30 DEG C or below can be provided, and the structure and composition designed and described in the module can stably fix the peroxide free radical into the concentration of NO2 through a stable chain reaction. In combination with a high-precision nitrogen dioxide analyzer, the measurement of the peroxide free radical can be realized. By using the sub-pipe 103 as a reaction cavity, the module can provide a relatively dry environment, which is beneficial to the chain reaction of the peroxide free radical with CO and NO. The design ensures the high efficiency and stability of the reaction, so that the peroxide free radical can fully participate in the reaction and be converted into the measurable NO2 concentration.

[0027] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A peroxyl radical chemically amplified module comprising a four-way valve (107), characterized in that, The side bottom of the four-way valve (107) is provided with three gas storage tanks (117), the top of the four-way valve (107) is provided with a source intensity three-way valve (108) and a gas mixing three-way valve two (109), the bottom of the four-way valve (107) is provided with a gas mixing three-way valve one (106) away from the side of the gas storage tank (117), the gas mixing three-way valve one (106), the four-way valve (107), the source intensity three-way valve (108) and the gas mixing three-way valve two (109) are used for controlling the circulation and entering of the gas.

2. A peroxyl radical chemical amplification module according to claim 1, wherein, The top of the left gas storage tank (117) is fixedly connected with a connecting pipe (118), one end of the connecting pipe (118) away from the gas storage tank (117) is fixedly connected to the side of the gas mixing three-way valve two (109) close to the gas storage tank (117), the middle gas storage tank (117) and the four-way valve (107) are connected through the connecting pipe (118) above the side of the four-way valve (107) close to the gas storage tank (117), and the right gas storage tank (117) and the four-way valve (107) are also connected through the connecting pipe (118) below the side of the four-way valve (107) close to the gas storage tank (117).

3. A peroxyl radical chemical amplification module according to claim 2, wherein, The top of the four-way valve (107) and the bottom of the gas mixing three-way valve two (109) are connected through the connecting pipe (118), the side of the four-way valve (107) away from the gas storage tank (117) and the gas mixing three-way valve one (106) are also connected through the connecting pipe (118), and the right side of the gas mixing three-way valve two (109) and the right side of the source intensity three-way valve (108) are connected through the connecting pipe (118), one side of the connecting pipe (118) away from the source intensity three-way valve (108) is fixedly connected with a temperature and humidity sensor (102).

4. A peroxyl radical chemical amplification module according to claim 3, wherein, The top of the temperature and humidity sensor (102) is fixedly connected with a sample inlet rainproof structure (101), the bottom of the temperature and humidity sensor (102) is fixedly connected with a dry gas outlet (110), the bottom of the dry gas outlet (110) is fixedly connected with a sub-pipe (103), the bottom of the sub-pipe (103) is fixedly connected with a dry gas inlet (104), the gas mixing three-way valve one (106) is fixedly connected to the bottom of the dry gas inlet (104), the bottom of the gas mixing three-way valve one (106) is fixedly connected with a filter (105), and one side of the air inlet (115) away from the gas mixing three-way valve one (106) is provided with a filtered air outlet (116).

5. A peroxyl radical chemical amplification module according to claim 4, wherein, Four connecting sleeve pipes one (111) are fixedly connected around the four-way valve (107), four connecting sleeve pipes one (111) are respectively sleeved outside four connecting pipes (118) connected with the four-way valve (107), and the front of the four-way valve (107) is provided with a control knob one (112).

6. A peroxyl radical chemical amplification module according to claim 5, wherein, The gas mixing three-way valve one (106), the source intensity three-way valve (108) and the gas mixing three-way valve two (109) are fixedly connected with the connecting sleeve two (113) on three sides, three connecting sleeve two (113) are respectively sleeved on the outside of the connecting pipe (118) connected with the gas mixing three-way valve one (106), the source intensity three-way valve (108) and the gas mixing three-way valve two (109), and the front of the gas mixing three-way valve one (106), the source intensity three-way valve (108) and the gas mixing three-way valve two (109) is provided with the control knob two (114).

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