Tail gas treatment device for a chromatograph

Abstract

The utility model discloses a tail gas treatment device of chromatograph, including operation platform, two supports are fixed on the operation platform top, the left side support is connected with the contraction section, the right side support is connected with the diffusion section, the contraction section and diffusion section middle fixed have throat, the contraction section, throat and diffusion section integrative forming combination into venturi, the throat surface extends downward and forms the connecting pipe, the connecting pipe bottom has the sealing ring, the sealing ring inside has the liquid suction tube, the liquid suction tube bottom is provided with the liquid storage jar, and the liquid suction tube passes through the liquid storage jar jar mouth and extends below the liquid level downward. The tail gas of chromatograph enters venturi from the contraction section, and the airflow reaches the highest flow rate and generates negative pressure in the throat, and the liquid suction tube will suck the treatment liquid in the liquid storage jar, and the treatment liquid sucked upward meets the high -speed airflow in the throat, and is torn into extremely fine mist drop instantly, and these mist drops and the tail gas fully mix and enter the diffusion section together.

Description

Technical Field

[0001] This utility model belongs to the technical field of tail gas treatment devices for chromatographs, and specifically relates to a tail gas treatment device for chromatographs. Background Technology

[0002] Chromatographs separate samples using chromatographic columns and analyze them using detectors (such as FID and ECD). This process generates exhaust gases containing organic solvents, acidic or alkaline gases, or toxic substances. Currently, laboratories often use direct emission or simple adsorption treatment, which poses problems such as environmental pollution, health hazards, and explosion risks. Existing exhaust gas treatment devices suffer from low efficiency, frequent consumable replacements, and limited functionality, making it difficult to meet increasingly stringent environmental and safety requirements.

[0003] A search revealed Chinese patent publication number CN 204233939 U, which discloses an insect trapping net comprising: a chromatograph exhaust pipe, an "H-shaped" device housing, a small fan, a conical transparent glass cover, a drying module, an adsorption module, an exhaust port, and a ventilation pipe. The device housing is fitted into the chromatograph exhaust pipe, with a desiccant placed inside the outer ring of the fitting. A small fan is installed on the inner wall of the housing at the lower end of the glass cover, directly opposite the horizontal pipe. Adsorbent is placed in the exhaust adsorption tank below the exhaust port. The glass cover is detachable, allowing observation of the device's operation and timely replacement of the desiccant and cleaning of dust.

[0004] The aforementioned patent has the following shortcomings: this structure uses an adsorbent to absorb harmful substances, resulting in a limited gas-liquid contact area, low mass transfer efficiency, and incomplete absorption.

[0005] To address this, a tail gas treatment device for a chromatograph is proposed, which can significantly improve the mixing efficiency and reaction contact area between the tail gas and the treatment liquid through a venturi tube, thereby achieving a highly efficient purification process. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide a tail gas absorption device that can effectively solve the problem of limited gas-liquid contact area, and can significantly improve the mixing efficiency and reaction contact area between tail gas and treatment liquid, thereby achieving high-efficiency purification.

[0007] To address one or more of the above-mentioned defects or improvement needs in the prior art, this utility model provides a tail gas treatment device for a chromatograph, including an operating table. Two supports are bolted to the top of the operating table. A contraction section is clamped onto the left support, and a diffusion section is clamped onto the right support. A throat is fixed between the contraction and diffusion sections. The contraction, throat, and diffusion sections are hollow structures and integrally formed into a Venturi tube. A connecting pipe extends downward from the surface of the throat, communicating with the interior of the throat. A sealing ring is fitted to the bottom of the connecting pipe, and a suction tube is clamped inside the sealing ring. A storage tank is located at the bottom of the suction tube, containing a treatment liquid. The suction tube extends downward through the opening of the storage tank to below the liquid surface.

[0008] In some embodiments, the side of the operating table is fixedly connected to a pipe clamp by bolts, and the diffuser section extends outward from the end away from the throat to form a reaction chamber.

[0009] In some embodiments, a blower is fixedly connected to the surface of the operating table by bolts, and an air-gathering hood is welded to the inner wall of the blower's air outlet. A contraction section is fixedly connected to the end of the air-gathering hood away from the blower.

[0010] In some embodiments, an air inlet pipe is fixedly connected to the inner wall of the blower air inlet by bolts.

[0011] In some embodiments, a cyclone separator is snapped into the inner wall of the pipe clamp, and the top side of the cyclone separator is fixedly connected to the end of the reaction chamber away from the throat by bolts.

[0012] In some embodiments, an exhaust pipe is bolted to the top of the cyclone separator.

[0013] In some embodiments, a support plate is fixedly connected to the side of the operating table by bolts, and a water outlet pipe is sleeved onto the bottom of the side of the cyclone separator, with a diversion tank glued to the bottom of the water outlet pipe.

[0014] In some embodiments, the top of the support plate is bonded to the bottom of the diversion tank.

[0015] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: 1. This utility model discloses a tail gas treatment device for a chromatograph, which features a specific installation position for the suction tube connecting the throat of the venturi tube to the liquid storage tank. This structure utilizes the system's own airflow to achieve liquid delivery and atomization, eliminating the need for an additional pump and reducing energy consumption and complexity. The atomized droplets significantly increase the gas-liquid contact area, resulting in a more complete reaction and a purification efficiency far exceeding that of simple bubbling.

[0016] 2. The present invention relates to a tail gas treatment device for a chromatograph, wherein the installation of the blower and the inlet hood allows the tail gas of the chromatograph to enter through the inlet pipe and be accelerated by the blower, and then enter the converging section of the venturi tube through the gas-gathering hood. The gas-gathering hood can make the tail gas organization more efficient, minimize the diffusion and pressure loss of the airflow during the transportation process, and achieve the required effect with a small-power blower, thereby reducing energy consumption and operating noise.

[0017] 3. The present invention relates to a tail gas treatment device for a chromatograph, wherein the purified gas and the droplets formed by the treatment liquid can enter a cyclone separator through the reaction chamber. The cyclone separator can separate the purified gas and the droplets formed by the treatment liquid. The purified gas can be discharged through the gas outlet pipe, while the droplets formed by the treatment liquid will enter the diversion tank through the water outlet pipe for recycling. The cyclone separator has no moving parts and does not require an additional motor, which reduces energy consumption and complexity, and has a low failure rate, greatly reducing the cost of use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a tail gas treatment device for a chromatograph according to an embodiment of the present invention; Figure 2 This is a top view of a gas chromatograph tail gas treatment device according to an embodiment of the present invention; Figure 3 This is a side view of a tail gas treatment device for a chromatograph according to an embodiment of the present invention; Figure 4 This is a front view of a tail gas treatment device for a chromatograph according to an embodiment of the present invention; Figure 5 This is a tail gas treatment device for a chromatograph according to an embodiment of the present invention. Figure 4 A magnified view of part A in the middle.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1 operating platform, 2 support plate, 3 air inlet pipe, 4 air outlet pipe, 5 bracket, 6 pipe clamp, 7 contraction section, 8 throat, 9 diffuser section, 10 reaction chamber, 11 cyclone separator, 12 diversion tank, 13 connecting pipe, 14 sealing ring, 15 suction pipe, 16 storage tank, 17 water outlet pipe, 18 blower, 19 gas concentrator. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] Please refer to Figure 1-5 A tail gas treatment device for a chromatograph includes an operating table 1. Two supports 5 are bolted to the top of the operating table 1. A constriction section 7 is attached to the left support 5, and a diffusion section 9 is attached to the right support 5. A throat 8 is fixed between the constriction section 7 and the diffusion section 9. The constriction section 7, throat 8, and diffusion section 9 are hollow structures and integrally formed into a Venturi tube. A connecting pipe 13 extends downward from the surface of the throat 8, communicating with the interior of the throat 8. A sealing ring 14 is fitted to the bottom of the connecting pipe 13, and a suction pipe 15 is attached inside the sealing ring 14. A storage tank 16 is located at the bottom of the suction pipe 15, storing a treatment liquid. The suction pipe 15 extends downward through the opening of the storage tank 16 to below the liquid surface. The end of the diffusion section 9 away from the throat 8 extends outward to form a reaction chamber 10. After the chromatograph exhaust gas enters the venturi tube from the contraction section 7, the gas flow reaches its maximum velocity at the throat 8, while the static pressure drops to its minimum, creating a negative pressure. When the high-speed gas flow generates negative pressure at the throat, the suction pipe 15, connected to the liquid suction pipe 15 by the sealing ring 14 to form a sealed structure, "draws" the processed liquid from the storage tank 16. The drawn-up processed liquid encounters the high-speed gas flow at the throat and is instantly sheared and torn into extremely fine droplets. These fine droplets have a huge total surface area and, after being fully mixed with the exhaust gas, enter the diffusion section 9 together. After entering the reaction chamber 10 from the diffusion section 9, the flow rate decreases and the pressure gradually recovers, providing sufficient contact reaction time for the gas and liquid phases. The liquid in the storage tank 16 can be replaced depending on the type of chromatograph exhaust gas; for example, dilute alkaline solution is used to absorb acidic gases, or potassium permanganate solution is used to oxidize organic matter, making the device more flexible and convenient for handling different types of chromatograph exhaust gases.

[0023] In this embodiment, a blower 18 is bolted to the surface of the operating table 1. A gas-concentrating hood 19 is welded to the inner wall of the blower 18's outlet. A converging section 7 is fixedly connected to the end of the gas-concentrating hood 19 away from the blower 18. An inlet pipe 3 is bolted to the inner wall of the blower 18's inlet. The chromatograph's exhaust gas enters through the inlet pipe 3 and is accelerated by the blower 18. Then, it enters the converging section 7 of the venturi tube through the gas-concentrating hood 19. The gas-concentrating hood 19 can make the exhaust gas organization more efficient, minimizing the diffusion and pressure loss of the airflow during the delivery process. The required effect can be achieved with a low-power blower 18, reducing energy consumption and operating noise.

[0024] In this embodiment, a pipe clamp 6 is fixedly connected to the side of the operating table 1 by bolts. A cyclone separator 11 is clamped to the inner wall of the pipe clamp 6. An air outlet pipe 4 is fixed to the top of the cyclone separator 11 by bolts. The top side of the cyclone separator 11 is fixedly connected to the end of the reaction chamber 10 away from the throat 8 by bolts. A water outlet pipe 17 is sleeved to the bottom side of the cyclone separator 11. A diversion tank 12 is glued to the bottom of the water outlet pipe 17. A support plate 2 is fixedly connected to the side of the operating table 1 by bolts. The top of the support plate 2 is glued to the bottom of the diversion tank 12. The purified gas and the mist formed by the treatment liquid can enter the cyclone separator 11 through the reaction chamber 10. The cyclone separator 11 can separate the purified gas and the mist formed by the treatment liquid. The purified gas can be discharged through the gas outlet pipe 4, while the mist formed by the treatment liquid will enter the diversion tank 12 through the water outlet pipe 17 and can be recycled and reused. The cyclone separator 11 has no moving parts and does not require an additional motor, which reduces energy consumption and complexity, and has a low failure rate, greatly reducing the cost of use.

[0025] In this example, a gas chromatograph exhaust treatment device is described. The exhaust gas from the chromatograph enters the blower 18 through the inlet pipe 3, is accelerated by the blower 18, and then converges through the gas concentrator 19 into the constriction tube 7. Due to the characteristics of the venturi tube, the airflow reaches its maximum velocity at the throat while the static pressure drops to its minimum, forming a negative pressure. Since the connecting pipe 13 and the suction pipe 15 are connected by a sealing ring 14 to form a sealed structure, the suction pipe 15 "draws" the treated liquid from the storage tank 16. The drawn-up treated liquid encounters the high-speed airflow at the throat and is instantly sheared and torn into extremely fine droplets. These fine droplets have a huge total surface area and, after being fully mixed with the exhaust gas, enter the diffusion section 9 together. After entering the reaction chamber 10 from the diffusion section 9, the flow rate decreases and the pressure gradually recovers, providing sufficient contact reaction time for the gas and liquid phases. Afterwards, the purified gas and the mist formed by the treatment liquid can enter the cyclone separator 11 through the reaction chamber 10. The cyclone separator 11 can separate the purified gas and the mist formed by the treatment liquid. The purified gas can be discharged through the gas outlet pipe 4, while the mist formed by the treatment liquid will enter the diversion tank 12 through the water outlet pipe 17 and can be recycled and reused.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tail gas treatment device for a chromatograph, characterized in that: The system includes an operating table (1), on which two supports (5) are fixed by bolts. A contraction section (7) is attached to the left support (5), and a diffusion section (9) is attached to the right support (5). A throat (8) is fixed between the contraction section (7) and the diffusion section (9). The contraction section (7), throat (8) and diffusion section (9) are hollow structures and are integrally formed into a Venturi tube. The surface of the throat (8) extends downward to form a connecting pipe (13). The connecting pipe (13) communicates with the inside of the throat (8). A sealing ring (14) is fitted at the bottom of the connecting pipe (13). A suction pipe (15) is attached inside the sealing ring (14). A storage tank (16) is provided at the bottom of the suction pipe (15). The storage tank (16) stores the treatment liquid. The suction pipe (15) extends downward through the opening of the storage tank (16) to below the liquid surface.

2. The tail gas treatment device for a chromatograph according to claim 1, characterized in that: The side of the operating table (1) is fixedly connected to a pipe clamp (6) by bolts, and the diffuser section (9) extends outward from the end away from the throat (8) to form a reaction chamber (10).

3. The tail gas treatment device for a chromatograph according to claim 1, characterized in that: A blower (18) is fixedly connected to the surface of the operating table (1) by bolts. An air-gathering hood (19) is welded to the inner wall of the air outlet of the blower (18). A shrink section (7) is fixedly connected to the end of the air-gathering hood (19) away from the blower (18).

4. The tail gas treatment device for a chromatograph according to claim 3, characterized in that: The blower (18) has an air inlet pipe (3) fixedly connected to the inner wall of the air inlet by bolts.

5. The tail gas treatment device for a chromatograph according to claim 2, characterized in that: The inner wall of the pipe clamp (6) is fitted with a cyclone separator (11), and the top side of the cyclone separator (11) is fixedly connected to the end of the reaction chamber (10) away from the throat (8) by bolts.

6. The tail gas treatment device for a chromatograph according to claim 5, characterized in that: The top of the cyclone separator (11) is fixed with an air outlet pipe (4) by bolts.

7. The tail gas treatment device for a chromatograph according to claim 5, characterized in that: The operating table (1) is fixedly connected to a support plate (2) by bolts on the side. The bottom of the side of the cyclone separator (11) is connected to a water outlet pipe (17) by a sleeve. The bottom of the water outlet pipe (17) is connected to a diversion tank (12) by adhesive.

8. The tail gas treatment device for a chromatograph according to claim 7, characterized in that: The top of the support plate (2) is bonded to the bottom of the diversion tank (12).

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