CN220120784U - VOCs on-line analyzer - Google Patents

Abstract

The utility model discloses a VOCs on-line analyzer, which comprises a frame and a shell cover covered on the frame, wherein the shell cover comprises a top cover, a first side wall, a second side wall and a third side wall, and a low-temperature dehydration module, a low-temperature enrichment module, a chromatographic column module, an FID module and a heating module are arranged in the frame; the first side wall and the second side wall are provided with a first air inlet for ventilating the chromatographic column module and a second air inlet for ventilating the whole machine; a third air inlet for ventilating the low-temperature dehydration module is arranged on the first side wall; a fourth air inlet for ventilating the low-temperature enrichment module is formed in the second side wall; the third side wall is provided with a first air outlet for discharging air in the low-temperature dehydration module, a second air outlet for discharging air in the low-temperature enrichment module and a third air outlet for discharging air in the whole machine; the top cover is provided with a first radiating hole, a second radiating hole and a third radiating hole. The utility model has the advantages of good heat dissipation effect, short analysis time, accurate result and the like.

Description

VOCs on-line analyzer

Technical Field

The utility model mainly relates to the technical field of VOC measurement, in particular to a VOCs on-line analyzer.

Background

Volatile Organic Compounds (VOCs) have complex structures and large harm to human health, and are becoming an important cause of ozone exceeding and PM2.5 exceeding in recent years, and are attracting great attention. The VOCs on-line analyzer is used for testing the content of VOCs components in ambient air or factory boundary atmosphere, a sample collection port of the analyzer is connected to a sampling main pipe or the outdoor ambient atmosphere is collected through other paths, the sample is subjected to enrichment on volatile organic matters in a low-temperature trap or other modes, then rapid temperature rise analysis and sample injection are carried out, gas chromatographic separation is carried out, and the sample enters a hydrogen Flame Ionization Detector (FID) or/and a Mass Spectrum Detector (MSD) for response, and the final result is obtained by software collection of signals and calculation.

In the prior art, the overall heat dissipation design of the VOCs on-line analyzer is unreasonable, and the stability of the system, the temperature control of part of modules and the temperature field distribution are affected; the cooling time is long, the control repeatability of the heating rate is poor, the peak separation can not meet the standard requirement, the retention time drift is serious, and the identification of effective substances can not be carried out through the retention time.

Therefore, the design of the VOCs on-line analyzer with good heat dissipation effect, short sample analysis time, higher experimental efficiency and more accurate test result has very important practical significance.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the utility model provides the VOCs on-line analyzer which has the advantages of good heat dissipation effect, short sample analysis time, higher experimental efficiency and more accurate test result.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the VOCs on-line analyzer comprises a frame and a shell cover covered on the frame, wherein the shell cover comprises a top cover, a first side wall, a second side wall and a third side wall, the first side wall and the second side wall are oppositely arranged, and the third side wall is connected with the first side wall and the second side wall; the first side wall and the second side wall are provided with a first air inlet for ventilating the chromatographic column module and a second air inlet for ventilating the whole chromatographic column module; the first side wall is also provided with a third air inlet for ventilating the low-temperature dehydration module; the second side wall is also provided with a fourth air inlet for ventilating the low-temperature enrichment module; the third side wall is provided with a first air outlet for exhausting air in the low-temperature dehydration module, a second air outlet for exhausting air in the low-temperature enrichment module and a third air outlet for exhausting air in the whole machine; the top cover is provided with a first radiating hole for radiating the chromatographic column module, a second radiating hole for radiating the FID module and a third radiating hole for radiating the heating module.

As a further improvement of the utility model: and a first sealing component is arranged at the first air inlet and the third air inlet on the first side wall.

As a further improvement of the utility model: and a second sealing assembly is arranged at the first air inlet and the fourth air inlet on the second side wall.

As a further improvement of the utility model: and a third sealing assembly is arranged at the first air outlet and the second air outlet on the third side wall.

As a further improvement of the utility model: the chromatographic column module comprises a first chromatographic column module and a second chromatographic column module, and the first chromatographic column module and the second chromatographic column module are arranged below the first heat dissipation hole.

As a further improvement of the utility model: the FID module includes a first FID module and a second FID module disposed below the second heat dissipation hole.

As a further improvement of the utility model: the system further comprises a central cutting module for controlling the high/low carbon components to cut into the first FID module and the second FID module respectively.

As a further improvement of the utility model: the heating module is arranged below the third heat dissipation hole.

As a further improvement of the utility model: also included is a front side wall and an EPC module including a first EPC module and a second EPC module, the EPC modules disposed proximate an interior wall of the front side wall.

As a further improvement of the utility model: an EPC shield is also included for isolating EPC modules.

As a further improvement of the utility model: the first side wall, the second side wall, the third side wall, the top cover and the front side wall are detachably connected with the frame.

As a further improvement of the utility model: the chromatographic column module comprises a heat insulation box and a heating assembly, wherein the heating assembly is arranged in the heat insulation box and comprises a heating plate, a heat conducting plate and a pressing plate, the heating plate is arranged below the heat conducting plate, the pressing plate is arranged on the upper surface of the heat conducting plate in a covering mode, grooves are formed in the lower surface of the pressing plate, opposite to the heat conducting plate, of the pressing plate, the heat conducting plate is used for arranging the chromatographic column and transferring heat of the heating plate to the chromatographic column, and an air interlayer is formed between the grooves of the pressing plate and the heat conducting plate.

As a further improvement of the utility model: the chromatographic column module further comprises an upper cover, a mounting plate and a heat dissipation assembly, wherein the heat dissipation assembly is arranged below the mounting plate, and the heating assembly and the heat dissipation assembly are arranged in a cavity formed by the upper cover and the heat insulation box.

As a further improvement of the utility model: the experimental gas circuit joint is arranged below the top cover.

As a further improvement of the utility model: the low-temperature dehydration device further comprises an air inlet converging assembly, and the air inlet converging assembly is arranged between the low-temperature dehydration module and the low-temperature enrichment module.

As a further improvement of the utility model: the gas circuit IO module is arranged above the gas inlet converging component.

As a further improvement of the utility model: the FID module further includes a FID board disposed proximate the first sidewall.

As a further improvement of the utility model: the device also comprises an FID shielding cover, wherein the FID shielding cover is arranged on the FID board card and is used for shielding electromagnetic interference.

As a further improvement of the utility model: the heat insulation device further comprises a heat insulation cover which is arranged above the FID module and the heating module and used for shielding and preserving heat of the FID module and the heating module.

As a further improvement of the utility model: the heating device further comprises a six-way valve module, and the six-way valve module is arranged on the heating module.

As a further improvement of the utility model: and a partition plate is arranged between the FID module and the heating module.

As a further improvement of the utility model: the low-temperature dehydration module, the low-temperature enrichment module and the chromatographic column module are all provided with shock pads.

As a further improvement of the utility model: still be equipped with the aspiration pump in the frame, the aspiration pump is close to the second lateral wall and arranges, the below of aspiration pump is equipped with the shock pad.

Compared with the prior art, the utility model has the advantages that:

according to the VOCs on-line analyzer, a first air inlet for ventilating a chromatographic column module and a second air inlet for ventilating the whole machine are arranged on a first side wall and a second side wall; a third air inlet for ventilating the low-temperature dehydration module is arranged on the first side wall; a fourth air inlet for ventilating the low-temperature enrichment module is also formed in the second side wall; the third side wall is provided with a first air outlet for discharging air in the low-temperature dehydration module, a second air outlet for discharging air in the low-temperature enrichment module and a third air outlet for discharging air in the whole machine; the top cover is provided with a first radiating hole for radiating the chromatographic column module, a second radiating hole for radiating the FID module and a third radiating hole for radiating the heating module; adopt the side air inlet, mode of airing exhaust behind, set up solitary air intake, air outlet and louvre to each important module, can realize that each module and instrument are inside heat in time to be discharged, get into for outside cold wind from the side air intake, the wind through heat flow exchange all discharges quick-witted case from the third lateral wall, the wind channel is smooth and easy, has improved refrigeration radiating efficiency, can effectively shorten test time, has improved test efficiency, and can reduce the residual of sample, improves the precision of test.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is a perspective view of another perspective view of the present utility model.

Fig. 3 is a perspective view of the present utility model with the outer casing removed.

Fig. 4 is a perspective view of the present utility model from another perspective with the outer housing removed.

Fig. 5 is a side view of the utility model with the housing cover removed.

Fig. 6 is a rear view of the utility model with the housing cover removed.

Fig. 7 is a top view of the utility model with the housing cover removed.

Fig. 8 is an exploded view of a first chromatography column module according to the utility model.

Fig. 9 is a cross-sectional view of a first chromatography column module of the utility model.

Fig. 10 is an enlarged view at a in fig. 9.

Fig. 11 is an exploded view of a first chromatography column module according to the utility model.

Fig. 12 is a cross-sectional view of a first chromatography column module of the utility model.

Fig. 13 is an enlarged view at B in fig. 12.

Legend description:

1. a frame; 2. a top cover; 3. a first sidewall; 4. a second sidewall; 5. a third sidewall; 6. a low temperature dehydration module; 7. a low temperature enrichment module; 8. a chromatographic column module; 81. a first chromatographic column module; 82. a second chromatographic column module; 801. a heat insulation box; 802. a heating assembly; 8021. a heating plate; 8022. a heat conductive plate; 8023. a pressing plate; 8024. a chromatographic column; 8025. an air interlayer; 803. an upper cover; 804. a mounting plate; 805. a heat dissipation assembly; 9. a FID module; 91. a first FID module; 92. a second FID module; 93. FID board card; 10. a heating module; 11. a first air inlet; 12. a second air inlet; 13. a third air inlet; 14. a fourth air inlet; 15. a first air outlet; 16. a second air outlet; 17. a third air outlet; 18. a first heat radiation hole; 19. a second heat radiation hole; 20. a third heat radiation hole; 21. a first seal assembly; 22. a second seal assembly; 23. a third seal assembly; 24. a central cutting module; 25. a front sidewall; 26. an EPC module; 261. a first EPC module; 262. a second EPC module; 27. EPC shield; 29. an air intake converging assembly; 30. the gas circuit IO module; 31. a FID shield; 32. a heat shield; 33. a six-way valve module; 34. a partition plate; 35. an air extracting pump; 36. and a flow control module.

Detailed Description

The utility model is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the utility model is not limited thereby.

In the description of the present utility model, it should be understood that the terms "side," "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more such features, and in the description of the present utility model, a "plurality" means two or more, unless otherwise specifically limited.

The utility model will be described in further detail with reference to the drawings and the specific examples.

As shown in fig. 1 to 13, the present embodiment discloses a VOCs online analyzer, which comprises a frame 1 and a housing cover covered on the frame 1, wherein the housing cover comprises a top cover 2, a first side wall 3 and a second side wall 4 which are oppositely arranged, and a third side wall 5 which connects the first side wall 3 and the second side wall 4, and a low-temperature dehydration module 6, a low-temperature enrichment module 7, a chromatographic column module 8, a FID module 9 and a heating module 10 are arranged in the frame 1; the first side wall 3 and the second side wall 4 are provided with a first air inlet 11 for ventilating the chromatographic column module 8 and a second air inlet 12 for ventilating the whole machine; the first side wall 3 is also provided with a third air inlet 13 for ventilating the low-temperature dehydration module 6; the second side wall 4 is also provided with a fourth air inlet 14 for ventilating the low-temperature enrichment module 7; the third side wall 5 is provided with a first air outlet 15 for discharging air in the low-temperature dehydration module 6, a second air outlet 16 for discharging air in the low-temperature enrichment module 7 and a third air outlet 17 for discharging air in the whole machine; the top cover 2 is provided with a first heat radiation hole 18 for radiating heat from the chromatographic column module 8, a second heat radiation hole 19 for radiating heat from the FID module 9, and a third heat radiation hole 20 for radiating heat from the heating module 10.

The VOCs on-line analyzer in this embodiment adopts the side air inlet, the mode of airing exhaust at the back, sets up solitary air intake, air outlet and louvre to each important module, can realize that each module and instrument inside heat in time discharges, gets into for outside cold wind from the side air intake, and the wind that passes through the heat flow exchange all discharges the quick-witted case from third lateral wall 5, and the wind channel is smooth and easy, has improved refrigeration radiating efficiency, can effectively shorten test time, has improved test efficiency, and can reduce the residual of sample, improves the precision of test.

In this embodiment, the first sealing component 21 is disposed at the first air inlet 11 and the third air inlet 13 on the first sidewall 3. The first air inlet 11 and the fourth air inlet 14 on the second side wall 4 are provided with second sealing components 22, and the first air outlet 15 and the second air outlet 16 on the third side wall 5 are provided with third sealing components 23. Through setting up seal assembly, can play well sealed effect, simultaneously, seal assembly is the elastic component, when equipment shakes, can prevent that low temperature dehydration module 6, low temperature enrichment module 7 and chromatographic column module 8 from colliding with the inner wall of shell cover, can play the effect of each module of location.

In this embodiment, the chromatographic column module 8 includes a first chromatographic column module 81 (i.e., a high-carbon chromatographic column module) and a second chromatographic column module 82 (i.e., a low-carbon chromatographic column module), and the first chromatographic column module 81 and the second chromatographic column module 82 are disposed below the first heat dissipation hole 18. By arranging the first heat dissipation holes 18 on the first chromatographic column module 81 and the second chromatographic column module 82, timely heat dissipation of the chromatographic column module 8 can be effectively ensured, and the influence on the component separation speed due to untimely heat dissipation is avoided.

As shown in fig. 8 to 13, in the present embodiment, each of the first and second column modules 81 and 82 includes a heat insulation box 801 and a heating assembly 802, the heating assembly 802 is disposed in the heat insulation box 801, the heating assembly 802 includes a heating plate 8021, a heat conduction plate 8022 and a pressing plate 8023, the heating plate 8021 is disposed below the heat conduction plate 8022, the pressing plate 8023 is disposed on an upper surface of the heat conduction plate 8022, a groove is provided on a lower surface of the pressing plate 8023 opposite to the heat conduction plate 8022, the heat conduction plate 8022 is used for disposing a column 8024 and transferring heat of the heating plate 8021 to the column 8024, and an air interlayer 8025 is formed between the groove of the pressing plate 8023 and the heat conduction plate 8022; the chromatographic column module 8 further comprises an upper cover 803, a mounting plate 804 and a heat dissipating component 805, wherein the heat dissipating component 805 is arranged below the mounting plate 804, and the heating component 802 and the heat dissipating component 805 are arranged in a cavity formed by the upper cover 803 and the heat insulating box 801. Further, in the preferred embodiment, the heat dissipating component 805 in the first chromatographic column module 81 is arranged perpendicular to the mounting plate 804; the heat sink assembly 805 in the second chromatography column module 82 is arranged parallel to the mounting plate 804.

The chromatographic column module 8 with the air interlayer 8025 is adopted, so that the chromatographic column module 8 can be completely isolated from the outside, the heating is uniform, and the heat preservation cover is arranged at the air inlet and outlet, so that the residue can be reduced. The heating element 802 of chromatographic column sets up in the heat-insulating box 801, can reduce the influence of ambient temperature to the post case, and chromatographic column module 8 adopts the mode of side air inlet, draws outside cold wind from the bottom through the fan and passes through the heating element 802 of chromatographic column 8024, and the upper cover 803 rear side air-out of follow chromatographic column module 8 has improved radiating efficiency again.

In the present embodiment, the FID module 9 includes a first FID module 91 and a second FID module 92, and the first FID module 91 and the second FID module 92 are disposed below the second heat dissipation hole 19. The concentration of the high-carbon component and the concentration of the low-carbon component are respectively tested by adopting the double FID, and the analysis time of the map sample can be greatly shortened by adopting the low-temperature dehydration module 6 and the low-temperature enrichment module 7 with high refrigeration/thermal analysis efficiency and low cost to carry out low-temperature dehydration and enrichment.

In this embodiment, the heating module 10 is disposed below the third heat dissipation hole 20, and by providing the third heat dissipation hole 20, timely heat dissipation of the heating module 10 can be achieved.

In this embodiment, the center cutting module 24 is further included, and the center cutting module 24 is used to control the high/low carbon components to cut into the first FID module 91 and the second FID module 92, respectively. Through reducing the test gas circuit aperture, can reduce and remain, avoid high low carbon to take place to mix the appearance, adjust the post flow and can not interfere each other, the inside sample residue of instrument is few, can accord with standard requirement.

In this embodiment, the front side wall 25 and the EPC module 26 are further included, the EPC module 26 includes a first EPC module 261 and a second EPC module 262, the EPC module 26 is disposed near an inner wall of the front side wall 25, and the main control card is disposed below the EPC module 26. This arrangement enables EPC module 26 to be located as far from the vibroseis source as possible, reducing the impact of vibrations on the EPC module.

In this embodiment, an EPC shield 27 is further included to isolate EPC module 26 to reduce signal interference and thermal noise.

In this embodiment, the first side wall 3, the second side wall 4, the third side wall 5, the top cover 2 and the front side wall 25 are detachably connected to the frame 1. The whole machine is designed into a frame type multi-layer sheet metal structure, the peripheral shell covers can be detached independently, the detachment is convenient, the weight is light, and the maintenance is convenient. The shell cover is assembled by a plurality of detachable plates, so that the maintainability of the equipment is improved, and the assembly is convenient; if the top cover 2 is opened, the chromatographic column can be maintained, and the low-temperature dehydration module 6, the low-temperature enrichment module 7, the air inlet converging component 29 and the air path IO module 30 can be conveniently maintained by opening the third side wall 5; opening the front side wall 25 enables maintenance of the main control card, EPC module 26.

In this embodiment, still include experimental gas circuit joint, experimental gas circuit joint sets up in the below of top cap 2, and the convenient gas tightness of inspection is convenient for maintain.

In this embodiment, the system further includes an air inlet converging assembly 29, the air inlet converging assembly 29 is disposed between the low-temperature dehydration module 6 and the low-temperature enrichment module 7, and all sample injection air paths are integrally designed on the air inlet converging assembly 29; the low-temperature dehydration module 6 and the low-temperature enrichment module 7 are arranged above the air inlet converging assembly 29, and the low-temperature dehydration module 6 and the low-temperature enrichment module 7 can reduce air path residues.

In this embodiment, the heating module 10 further includes a six-way valve module 33, and the six-way valve module 33 is disposed on the heating module 10, so as to reduce gas path residues.

In this embodiment, the FID module 9 further includes a FID board 93, and the FID board 93 is disposed near the first sidewall 3; a partition 34 is also arranged between the FID module 9 and the heating module 10; isolating the FID module 9 from the heating module 10 by providing a partition 34, the partition 34 for isolating heat exchange and reducing thermal noise; further included is an FID shield 31, the FID shield 31 being provided on the FID board 93 for shielding electromagnetic interference.

In this embodiment, the heat insulation device further includes a heat insulation cover 32, and the heat insulation cover 32 is disposed above the FID module 9 and the heating module 10, and is used for insulating and preserving heat of the FID module 9 and the heating module 10, so that signal interference and thermal noise can be effectively reduced.

In the embodiment, the low-temperature dehydration module 6, the low-temperature enrichment module 7 and the chromatographic column module 8 are all provided with shock pads; the frame 1 is also internally provided with an air pump 35, the air pump 35 is arranged close to the second side wall 4, and a shock pad is arranged below the air pump 35. By arranging the shock pad, vibration noise brought to equipment by vibration of the air pump 35 can be eliminated, and the problems that a part of low-carbon peaks are hidden and identified incompletely by noise and the like due to overlarge baseline fluctuation are avoided.

Through setting up FID shield cover 31, heat exchanger 32 and shock pad, can effectively reduce wind, vibrations, temperature fluctuation's interference to the system for signal to noise ratio promotes by a wide margin, and the base line fluctuation range reduces more than 10 times.

Working principle: ambient air or standard gas enters a sample collection unit of the VOCs on-line analyzer at a constant flow rate through a suction pump 35 and a flow control module 36, is subjected to pre-dehydration treatment through a low-temperature dehydration module 6, enters a low-temperature enrichment module 7 on a six-way valve module 33 to enrich various components of volatile organic matters, is quickly heated after the six-way valve module 33 is switched, is analyzed and sampled, is pushed into a first chromatographic column module 81 from the low-temperature enrichment module 7 by the control of sampling pressure through an EPC module 26, flows into a second chromatographic column module 82 through a central cutting module 24, and then enters a second FID module 92 (hydrogen flame ionization detector) to detect, so that the concentration of low-carbon components in the volatile organic matters is obtained; after the low-carbon component completely enters the second chromatographic column module 82, the central cutting module 24 cuts the high-carbon component from the first chromatographic column module 81 into the first FID module 91 (hydrogen flame ionization detector) for detection, so as to obtain the concentration of the high-carbon component in the volatile organic compound.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be within the scope of the utility model as set forth in the following claims.

Claims (23)

1. The VOCs on-line analyzer is characterized by comprising a frame (1) and a shell cover covered on the frame (1), wherein the shell cover comprises a top cover (2), a first side wall (3) and a second side wall (4) which are oppositely arranged, and a third side wall (5) which is connected with the first side wall (3) and the second side wall (4), and a low-temperature dehydration module (6), a low-temperature enrichment module (7), a chromatographic column module (8), a FID module (9) and a heating module (10) are arranged in the frame (1); a first air inlet (11) for ventilating the chromatographic column module (8) and a second air inlet (12) for ventilating the whole machine are arranged on the first side wall (3) and the second side wall (4); a third air inlet (13) for ventilating the low-temperature dehydration module (6) is also formed in the first side wall (3); a fourth air inlet (14) for ventilating the low-temperature enrichment module (7) is also formed in the second side wall (4); the third side wall (5) is provided with a first air outlet (15) for discharging air in the low-temperature dehydration module (6), a second air outlet (16) for discharging air in the low-temperature enrichment module (7) and a third air outlet (17) for discharging air in the whole machine; the top cover (2) is provided with a first radiating hole (18) for radiating the chromatographic column module (8), a second radiating hole (19) for radiating the FID module (9) and a third radiating hole (20) for radiating the heating module (10).

2. The VOCs online analyzer according to claim 1, characterized in that a first sealing assembly (21) is provided at the first air inlet (11) and the third air inlet (13) on the first side wall (3).

3. The VOCs online analyzer according to claim 1, characterized in that a second sealing assembly (22) is provided at the first air inlet (11) and the fourth air inlet (14) on the second side wall (4).

4. The VOCs online analyzer according to claim 1, characterized in that a third sealing assembly (23) is provided at the first air outlet (15) and the second air outlet (16) on the third side wall (5).

5. The VOCs online analyzer according to claim 1, characterized in that the chromatography column module (8) comprises a first chromatography column module (81) and a second chromatography column module (82), the first chromatography column module (81) and the second chromatography column module (82) being arranged below the first heat dissipation hole (18).

6. The VOCs online analyzer according to claim 1, characterized in that the FID module (9) comprises a first FID module (91) and a second FID module (92), the first FID module (91) and the second FID module (92) being arranged below the second heat dissipation hole (19).

7. The VOCs online analyzer of claim 6, further comprising a central cutting module (24), the central cutting module (24) for controlling the cutting of high/low carbon components into the first FID module (91) and the second FID module (92), respectively.

8. The VOCs online analyzer according to claim 1, characterized in that the heating module (10) is arranged below the third heat sink (20).

9. The VOCs online analyzer of claim 1, further comprising a front side wall (25) and an EPC module (26), the EPC module (26) comprising a first EPC module (261) and a second EPC module (262), the EPC module (26) being disposed proximate an interior wall of the front side wall (25).

10. The VOCs online analyzer of claim 9, further comprising an EPC shield (27) for isolating the EPC module (26).

11. The VOCs online analyzer according to claim 9, wherein the first side wall (3), the second side wall (4), the third side wall (5), the top cover (2) and the front side wall (25) are detachably connected to the frame (1).

12. The VOCs online analyzer according to any one of claims 1 to 11, wherein the chromatographic column module (8) comprises a heat insulation box (801) and a heating assembly (802), the heating assembly (802) is arranged in the heat insulation box (801), the heating assembly (802) comprises a heating plate (8021), a heat conducting plate (8022) and a pressing plate (8023), the heating plate (8021) is arranged below the heat conducting plate (8022), the pressing plate (8023) is arranged on the upper surface of the heat conducting plate (8022), a groove is arranged on the lower surface of the pressing plate (8023) opposite to the heat conducting plate (8022), the heat conducting plate (8022) is used for arranging a chromatographic column (8024) and transferring heat of the heating plate (8021) to the chromatographic column (8024), and an air interlayer (8025) is formed between the groove of the pressing plate (8023) and the heat conducting plate (8022).

13. The VOCs online analyzer according to claim 12, wherein the chromatographic column module (8) further comprises an upper cover (803), a mounting plate (804) and a heat dissipating assembly (805), the heat dissipating assembly (805) is disposed below the mounting plate (804), and the heating assembly (802), the heat dissipating assembly (805) are disposed in a cavity formed by the upper cover (803) and the heat insulating box (801).

14. The VOCs online analyzer according to any one of claims 1 to 11, further comprising an experimental gas circuit connector, which is arranged below the top cover (2).

15. The VOCs online analyzer according to any one of claims 1 to 11, further comprising an intake manifold assembly (29), the intake manifold assembly (29) being disposed between the low temperature dehydration module (6) and the low temperature enrichment module (7).

16. The VOCs online analyzer according to claim 15, further comprising a gas circuit IO module (30), the gas circuit IO module (30) being disposed above the gas inlet manifold assembly (29).

17. The VOCs online analyzer according to any one of claims 1 to 11, characterized in that the FID module (9) further comprises a FID card (93), the FID card (93) being arranged close to the first side wall (3).

18. The VOCs online analyzer of claim 17, further comprising an FID shield (31), the FID shield (31) being disposed over an FID board (93) for shielding electromagnetic interference.

19. The VOCs online analyzer according to claim 17, further comprising a heat shield (32), the heat shield (32) being arranged above the FID module (9) and the heating module (10) for isolating and insulating the FID module (9) and the heating module (10).

20. The VOCs online analyzer according to any of claims 1 to 11, further comprising a six-way valve module (33), the six-way valve module (33) being arranged on the heating module (10).

21. The VOCs online analyzer according to any one of claims 1 to 11, characterized in that a partition (34) is further provided between the FID module (9) and the heating module (10), said partition being used for isolating heat exchange and reducing thermal noise.

22. The VOCs online analyzer according to any one of claims 1 to 11, wherein the low temperature dehydration module (6), the low temperature enrichment module (7) and the chromatographic column module (8) are each provided with a shock pad.

23. The VOCs online analyzer according to any one of claims 1 to 11, characterized in that an air pump (35) is further arranged in the frame (1), the air pump (35) is arranged close to the second side wall (4), and a shock pad is arranged below the air pump (35).