CN111829966A - A thermo-optic reaction furnace on an offline organic carbon elemental carbon analyzer - Google Patents

Abstract

The invention discloses a thermo-optical reaction furnace on an offline organic carbon element carbon analyzer, which relates to the field of ambient air monitoring and includes a support box, a high-temperature furnace, a laser light source, a reflected light detector, a transmitted light detector, a heater, a refrigeration device and a The controller, the high temperature furnace includes a main body pipe, an intake branch pipe and an oxidant branch pipe, the intake branch pipe and the oxidizer branch pipe are vertically arranged on one side of the main body pipe, the oxidizer branch pipe is filled with oxidant, the high temperature furnace is arranged in the support box, the upper and lower parts of the main body pipe are Both ends protrude from the top and bottom surfaces of the support box, the laser light source and the reflected light detector are installed at the top of the main body tube, the transmitted light detector is installed at the bottom end of the main body tube, the intake branch pipe and the oxidant branch pipe are both supported by the support box. The side of the heater sticks out, the heater is installed on the main body tube, and the insulation material is filled between the support box and the high temperature furnace. The device can realize accurate analysis and measurement of carbonaceous aerosols, and has good applicability and high reliability.

Description

A thermo-optic reaction furnace on an offline organic carbon elemental carbon analyzer

technical field

The invention relates to the field of ambient air monitoring, in particular to a thermo-optical reaction furnace on an offline organic carbon element carbon analyzer.

Background technique

Atmospheric carbonaceous aerosols are an important part of atmospheric particulate matter and have important impacts on climate change, air quality and human health. Therefore, the observational research and source analysis of carbonaceous aerosols has always been one of the frontiers and hotspots in the field of atmospheric environment and global climate change research. In recent years, with the intensification of urbanization and industrialization and the increase in the number of motor vehicles, the total energy consumption has continued to grow, resulting in my country becoming one of the regions with the highest concentrations of carbon aerosols. However, the high temporal resolution observation data of near-surface carbonaceous aerosol concentration is lacking at the regional scale, the spatial distribution is not clear, and the sources are controversial, making it difficult to allocate emission reduction shares in each administrative region in the region. Although the online organic carbon elemental carbon analyzer has obvious advantages in time resolution, it requires simultaneous monitoring at multiple points, the cost of deploying points and building stations is expensive, and the design of the whole machine is not suitable for laboratory quality control analysis. In response to this problem, it is urgent to develop a set of offline organic carbon element carbon analyzer products that can carry multiple particle samplers at the same time, with relatively low cost and suitable for quality control and data analysis in the laboratory.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a thermo-optical reaction furnace on an offline organic carbon element carbon analyzer, which can realize accurate analysis and measurement of carbonaceous aerosols, has good applicability and high reliability.

For achieving the above object, the present invention provides the following scheme:

The invention provides an off-line organic carbon elemental carbon analyzer on-board thermo-optical reaction furnace, comprising a support box, a high-temperature furnace, a laser light source, a reflected light detector, a transmitted light detector, a heater, a refrigeration device and a controller. The furnace includes a main body pipe, an air intake branch pipe and an oxidant branch pipe, the air intake branch pipe and the oxidant branch pipe are vertically arranged on one side of the main body pipe, and the air intake branch pipe and the oxidant branch pipe are perpendicular to each other, and the intake air branch pipe and the oxidant branch pipe are perpendicular to each other. The gas branch pipe is located above the oxidant branch pipe, the oxidizer branch pipe is filled with oxidant, the high temperature furnace is arranged in the support box, and the upper and lower ends of the main body pipe are respectively extended from the top surface and the bottom surface of the support box The laser light source and the reflected light detector are installed at the top of the main body pipe, the transmitted light detector is installed at the bottom end of the main body pipe, and the intake branch pipe and the oxidant branch pipe are both formed by The side of the support box protrudes, the heater is installed on the main body pipe, the space between the support box and the high-temperature furnace is filled with thermal insulation material, and the refrigeration device is used to cool the laser light source, the The reflected light detector and the transmitted light detector are cooled down, and the laser light source, the reflected light detector, the transmitted light detector, the heater and the cooling device are all connected to the controller.

Preferably, the support box includes an upper shell, a lower shell and a heat insulation board, the upper shell is mounted on the upper end of the lower shell, the heat insulation board is mounted on the top surface of the upper shell, and the top surface of the upper shell A first mounting hole is provided, a second mounting hole is provided on the heat insulating plate, the second mounting hole corresponds to the position of the first mounting hole, and the bottom surface of the lower casing is provided with a third mounting hole, so The lower end of one side surface of the upper casing is provided with a first groove, and the upper end of one side surface of the lower casing is provided with a second groove, the first groove and the second groove are corresponding in position, the first groove The groove and the second groove are butted to form a fourth installation hole, and the fourth installation hole is used for installing the intake branch pipe, and a third groove is provided on the lower end of the other side surface of the upper casing. The upper end of the other side surface of the casing is provided with a fourth groove, the position of the third groove and the fourth groove are corresponding, and the third groove and the fourth groove are butted to form a fifth installation hole, The fifth installation hole is used for installing the oxidant branch pipe.

Preferably, the upper casing and the lower casing are connected by screws, and the heat insulating plate and the upper casing are connected by screws.

Preferably, both the upper shell and the lower shell are made of metal materials, and the heat insulation board is made of bakelite or polytetrafluoroethylene.

Preferably, a through hole is disposed on the side of the lower casing away from the oxidant branch pipe, and an air supply device is disposed outside the through hole.

Preferably, the heat insulating material is glass fiber, and the high temperature furnace is made of quartz material.

Preferably, the refrigeration device includes two refrigerators, one of the refrigerators is disposed on one side of the laser light source and the reflected light detector, and the other refrigerator is disposed on the side of the transmitted light detector. side.

Preferably, the refrigerator is a fan, an alloy heat sink or an electronic cooling fin.

The present invention has achieved the following technical effects with respect to the prior art:

The thermo-optic reaction furnace on the offline organic carbon element carbon analyzer provided by the present invention includes a support box, a high-temperature furnace, a laser light source, a reflected light detector, a transmitted light detector, a heater, a refrigeration device and a controller. The carrier gas passes through the high temperature The inlet branch pipe in the furnace enters, and the analyzed pollutants are brought to the oxidant for catalytic oxidation reaction, and finally eliminated through the oxidant branch pipe, during which the heater heats the high-temperature furnace, and the laser light source is always in the analysis process. Light irradiation, tracking the color change of contaminants, reflected light detectors and transmitted light detectors record and track the changing light signal. The device in the present invention can be equipped with multiple particle samplers at the same time, the cost is relatively low, and it is suitable for use as a quality control and data analysis device in the laboratory. Accurate analysis and measurement of carbonaceous aerosols with good applicability and high reliability.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of thermo-optical reaction furnace on off-line organic carbon elemental carbon analyzer provided by the invention;

Fig. 2 is the structural representation of the high temperature furnace in the present invention;

FIG. 3 is a schematic structural diagram of a support box in the present invention.

Description of reference numerals: 1. Upper casing; 2. Lower casing; 3. Heat insulation plate; 4. Second mounting hole; 5. Fourth mounting hole; 6. Fifth mounting hole; 7. Through hole; 8. Main body Pipe; 9. Intake branch pipe; 10, Oxidant branch pipe; 11, Oxidant; 12, Laser light source; 13, Reflected light detector; 14, Transmitted light detector; 15, Refrigerator; 16, Heater; 17, Insulation material .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a thermo-optical reaction furnace on an offline organic carbon element carbon analyzer, which can realize accurate analysis and measurement of carbonaceous aerosols, has good applicability and high reliability.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2 , this embodiment provides a thermo-optical reaction furnace on an offline organic carbon elemental carbon analyzer, including a support box, a high-temperature furnace, a laser light source 12 , a reflected light detector 13 , and a transmitted light detector 14 , heater 16, refrigeration device and controller, the high temperature furnace includes a main body pipe 8, an intake branch pipe 9 and an oxidant branch pipe 10. It is perpendicular to the oxidant branch pipe 10, the intake branch pipe 9 is located above the oxidant branch pipe 10, the oxidant branch pipe 10 is filled with oxidant 11, the high temperature furnace is arranged in the support box, and the upper and lower ends of the main body pipe 8 are respectively formed by the top surface and bottom surface of the support box. Extend, the laser light source 12 and the reflected light detector 13 are installed on the top of the main body tube 8 , the orientation of the laser light source 12 and the reflected light detector 13 is parallel to the main body tube 8 , and the transmitted light detector 14 is installed at the bottom of the main body tube 8 end, the transmitted light detector 14 is parallel to the main body pipe 8, the intake branch pipe 9 and the oxidant branch pipe 10 both extend from the side of the support box, the heater 16 is installed on the main body pipe 8, and the heater 16 heats and covers the main body pipe 8 , the space between the support box and the high-temperature furnace is filled with a thermal insulation material 17. The thermal insulation material 17 is used to insulate the high-temperature furnace and prevent heat loss of the high-temperature furnace. The refrigeration device is used to detect the laser light source 12, the reflected light detector 13 and the transmitted light. The temperature of the device 14 is lowered, and the laser light source 12, the reflected light detector 13, the transmitted light detector 14, the heater 16 and the cooling device are all connected to the controller.

When in use, the carrier gas enters through the inlet branch pipe 9 in the high temperature furnace, and the analyzed pollutants are brought to the oxidant 11 for catalytic oxidation reaction, and finally eliminated through the oxidant branch pipe 10, during which the heater 16 is based on the temperature of the controller. The control program heats the high-temperature furnace, the thermal insulation material 17 can prevent the loss of heat, and the support box supports the overall structure. At the same time, the laser light source 12 is always irradiated with a beam of light during the analysis process to track the color change of the pollutants, and the reflected light is detected. The laser light source 12 , the reflected light detector 13 and the transmitted light detector 14 are cooled by the cooling device 13 and the transmitted light detector 14 to record and track the constantly changing optical signal. The device in this embodiment can be equipped with multiple particle samplers at the same time, the cost is relatively low, and it is suitable for use as a quality control and data analysis device in the laboratory. Realize accurate analysis and measurement of carbonaceous aerosols, with good applicability and high reliability.

As shown in FIG. 3 , the support box includes an upper casing 1, a lower casing 2 and a heat insulating plate 3. The upper casing 1 is installed on the upper end of the lower casing 2, the heat insulating plate 3 is installed on the top surface of the upper casing 1, and the top surface of the upper casing 1 is provided There is a first mounting hole, a second mounting hole 4 is provided on the heat insulating plate 3, the second mounting hole 4 corresponds to the position of the first mounting hole, the bottom surface of the lower shell 2 is provided with a third mounting hole, and one side of the upper shell 1 is provided with a third mounting hole. The lower end is provided with a first groove, and the upper end of one side surface of the lower casing 2 is provided with a second groove, the first groove and the second groove are in corresponding positions, and the first groove and the second groove are connected to form a fourth installation hole 5. The fourth installation hole 5 is used to install the intake branch pipe 9, the lower end of the other side of the upper casing 1 is provided with a third groove, the upper end of the other side of the lower casing 2 is provided with a fourth groove, the third groove and The position of the fourth groove corresponds to the position of the third groove and the fourth groove to form a fifth installation hole 6. The fifth installation hole 6 is used to install the oxidant branch pipe 10. The first installation hole, the second installation hole 4, the third installation hole The mounting holes, the fourth mounting holes 5 and the fifth mounting holes 6 are all used for fixing the high temperature furnace. Specifically, the side surface provided with the fourth mounting hole 5 is perpendicular to the side surface provided with the fifth mounting hole 6 .

In this specific embodiment, the upper casing 1 and the lower casing 2 are connected by screws, and the heat insulating plate 3 and the upper casing 1 are connected by screws.

In this specific embodiment, both the upper casing 1 and the lower casing 2 are made of metal materials, and the heat insulating plate 3 is made of bakelite or polytetrafluoroethylene material.

After the experiment, in order to facilitate air supply and cooling to the inside of the support box, a through hole 7 is provided on the side of the lower casing 2 away from the oxidant branch pipe 10 , and an air supply device is provided outside the through hole 7 . Specifically, the side surface provided with the through hole 7 is parallel to the side surface provided with the fifth mounting hole 6 .

In this specific embodiment, the heat insulating material 17 is glass fiber, and the high temperature furnace is made of quartz material.

In this specific embodiment, the heater 16 is an electric heating wire, and the electric heating wire is wound on the main body tube 8 . The heating temperature of the heater 16 is 20-850°C.

Specifically, the refrigeration device includes two refrigerators 15 , one refrigerator 15 is disposed on one side of the laser light source 12 and the reflected light detector 13 , and the other refrigerator 15 is disposed on one side of the transmitted light detector 14 .

In this embodiment, the refrigerator 15 is a fan, an alloy heat sink or an electronic cooling fin.

The manufacturing method of the thermo-optical reaction furnace on the off-line organic carbon elemental carbon analyzer in the present embodiment comprises the following steps:

(1) Provide a support box, the top surface of the upper casing 1 is provided with a first installation hole, the heat insulation plate 3 is provided with a second installation hole 4, and the first installation hole and the second installation hole 4 are used to install and fix the top of the main body pipe 8 , the bottom surface of the lower shell 2 is provided with a third mounting hole for mounting and fixing the bottom end of the main body pipe 8, the front and right sides of the upper shell 1 and the lower shell 2 are provided with the fourth mounting holes 5 and 5 for mounting and fixing the intake branch pipe 9 and the oxidant branch pipe 10. the fifth mounting hole 6;

(2) Fill insulation material 17 in the support box;

(3) Fill the oxidant 11 in the oxidant branch pipe 10 in the high temperature furnace;

(4) The high-temperature furnace filled with the oxidant 11 is installed in the heat insulating material 17, the heater 16 is installed to heat the high-temperature furnace, the upper casing 1 and the lower casing 2 are connected by screws, and the heat insulation board 3 is fixed by screws. The top surface of the upper shell 1;

(5) The laser light source 12 and the reflected light detector 13 are arranged on the top of the main body tube 8 of the high temperature furnace and outside the support box; the transmitted light detector 14 is arranged at the bottom of the main body tube 8 of the high temperature furnace and outside the support box ; The two refrigerators 15 are installed at positions close to the top and bottom of the main body tube 8, and the positions are basically at the same height as the reflected light detector 13 and the transmitted light detector 14.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (8)

1. The utility model provides a thermophoto reaction stove on off-line organic carbon element carbon analysis appearance which characterized in that, includes supporting box, high temperature furnace, laser source, reflection photo detector, transmission photo detector, heater, refrigerating plant and controller, the high temperature furnace includes main part pipe, air intake branch and oxidant branch pipe, air intake branch with the oxidant branch pipe all set up perpendicularly in main part pipe one side, just air intake branch with oxidant branch pipe mutually perpendicular, air intake branch is located oxidant branch pipe top, it has the oxidant to fill in the oxidant branch pipe, the high temperature furnace set up in the supporting box, the upper and lower both ends of main part pipe are stretched out by the top surface and the bottom surface of supporting box respectively, laser source with the reflection photo detector install in the top of main part pipe, the transmission photo detector install in the bottom of main part pipe, the gas inlet branch pipe and the oxidant branch pipe extend out of the side face of the support box, the heater is installed on the main body pipe, heat insulation materials are filled between the support box and the high-temperature furnace, the refrigerating device is used for cooling the laser light source, the reflection light detector and the transmission light detector, and the laser light source, the reflection light detector, the transmission light detector, the heater and the refrigerating device are all connected with the controller.

2. The off-line thermo-optic reaction furnace for an organic carbon element carbon analyzer according to claim 1, wherein the support box comprises an upper casing, a lower casing and a heat insulation plate, the upper casing is mounted on the upper end of the lower casing, the heat insulation plate is mounted on the top surface of the upper casing, the top surface of the upper casing is provided with a first mounting hole, the heat insulation plate is provided with a second mounting hole corresponding to the first mounting hole, the bottom surface of the lower casing is provided with a third mounting hole, the lower end of one side surface of the upper casing is provided with a first groove, the upper end of one side surface of the lower casing is provided with a second groove, the first groove and the second groove correspond to each other, the first groove and the second groove are butted to form a fourth mounting hole, the fourth mounting hole is used for mounting the inlet branch pipe, and the lower end of the other side surface of the upper casing is provided with a third groove, and a fourth groove is formed in the upper end of the other side face of the lower shell, the third groove corresponds to the fourth groove in position, the third groove is in butt joint with the fourth groove to form a fifth mounting hole, and the fifth mounting hole is used for mounting the oxidant branch pipe.

3. The off-line elemental organic carbon analyzer upper thermo-optic reaction furnace of claim 2, wherein the upper enclosure and the lower enclosure are connected by screws, and the heat insulating plate and the upper enclosure are connected by screws.

4. The off-line thermo-optic reaction furnace for an organic carbon elemental carbon analyzer as claimed in claim 2, wherein the upper and lower casings are made of metal material, and the heat insulation plate is made of bakelite or polytetrafluoroethylene material.

5. The off-line thermo-optic reaction furnace for the organic carbon element-carbon analyzer as claimed in claim 2, wherein a through hole is provided on a side surface of the lower housing away from the oxidant branch pipe, and an air supply device is provided outside the through hole.

6. The off-line thermo-optic reaction furnace for an organic carbon elemental carbon analyzer as claimed in claim 1, wherein the heat insulating material is glass fiber, and the high temperature furnace is made of quartz material.

7. The on-line thermo-optic reaction furnace for organic carbon elemental carbon analyzer according to claim 1, wherein the cooling device comprises two coolers, one of the coolers is disposed on one side of the laser light source and the reflection light detector, and the other cooler is disposed on one side of the transmission light detector.

8. The off-line thermo-optic reaction furnace for organic carbon elemental carbon analyzer of claim 7, wherein the refrigerator is a fan, an alloy cooling fin or an electronic cooling fin.

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