Anti-pollution air sampling pipe for hydrogen chloride sampling

Abstract

The utility model relates to the technical field of gas sample collection, and particularly discloses an anti-pollution air sampling pipe for hydrogen chloride sampling, which comprises a gas inlet pipe section, a reaction pipe section and an exhaust pipe section, the reaction pipe section is of a U-shaped structure, and the gas inlet end of the reaction pipe section is communicated and fixedly connected with the gas outlet end of the gas inlet pipe section; the gas outlet end of the reaction pipe section is communicated and fixedly connected with the gas inlet end of the exhaust pipe section, the gas outlet end of the exhaust pipe section is hermetically connected with a gas suction port of the flue gas sampling instrument, a gas inlet sealing element is mounted at the gas inlet end of the gas inlet pipe section, an exhaust sealing element is mounted at the gas outlet end of the exhaust pipe section, and a liquid adding element is arranged on the end side, close to the exhaust pipe section, of the reaction pipe section. The air inlet pipe section, the reaction pipe section and the exhaust pipe section are of an integrally-formed structure, the connecting cross beam is arranged between the inner sides of the two ends of the reaction pipe section, and the problem that before and after traditional hydrogen chloride is sampled, the structure of an air sampling pipe is integrally circulated, air gas is easily introduced additionally, and the measurement result of hydrogen chloride is interfered is solved.

Description

Technical Field

[0001] This application relates to the field of gas sample collection technology, and specifically discloses an air sampling tube for preventing contamination during hydrogen chloride sampling. Background Technology

[0002] Hydrogen chloride is a colorless, irritating, corrosive, and suffocating gas that strongly fumes in moist air. It is readily soluble in water and alcohol, and also soluble in ether. Its aqueous solution is called hydrochloric acid, also known as hydrochloric acid.

[0003] In existing methods for sampling hydrogen chloride in ambient air, exhaust gas, and stationary pollution source exhaust gas, a flue gas sampler is typically used as the power source. An air sampling tube is connected to the air intake of the flue gas sampler to collect the sampled air. A small amount of alkaline absorbent is added to the air sampling tube, which absorbs the hydrogen chloride in the sampled gas to generate sodium chloride, which is then analyzed and measured.

[0004] However, existing air sampling tubes are usually designed for complete flow, allowing outside air to circulate freely inside before and after gas sampling. This can easily cause contamination and interference within the air sampling tube, especially after the addition of alkaline absorbent and after the alkaline absorbent has absorbed hydrogen chloride. If outside air continues to enter the air sampling tube, it can easily interfere with the hydrogen chloride measurement results, making it difficult to sample and detect hydrogen chloride. Therefore, the inventors have provided an air sampling tube for preventing contamination during hydrogen chloride sampling to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in traditional hydrogen chloride sampling tubes, the overall structure of the tube is open before and after sampling, which easily introduces additional air gas and thus interferes with the hydrogen chloride measurement results.

[0006] To achieve the above objectives, the basic solution of this utility model provides an air sampling tube for preventing pollution during hydrogen chloride sampling. It includes an air inlet section for introducing air, a reaction section for containing alkaline absorbent liquid, and an exhaust section for guiding gas to the intake port of a flue gas sampler. The reaction section has a U-shaped structure. The air inlet end of the reaction section is connected and fixedly connected to the air outlet end of the air inlet section, and the air outlet end of the reaction section is connected and fixedly connected to the air inlet end of the exhaust section. The air outlet end of the exhaust section is sealed to the intake port of the flue gas sampler. An air inlet seal is installed at the air inlet end of the air inlet section, and an exhaust seal is installed at the air outlet end of the exhaust section. A liquid-adding component for adding alkaline absorbent liquid into the reaction section is provided on the end side of the reaction section near the exhaust section. The air inlet section, reaction section, and exhaust section are integrally formed, and a connecting beam is provided between the inner sides of both ends of the reaction section.

[0007] The principle and effect of this basic scheme are as follows:

[0008] 1. Compared with the prior art, this utility model provides sufficient reaction space and air sampling space for hydrogen chloride sampling by setting an integrally molded air inlet pipe section, reaction pipe section and exhaust pipe section. By setting air inlet sealing parts and exhaust sealing parts at the ends of the air inlet pipe section and exhaust pipe section respectively, it is convenient to seal the inside of the air inlet pipe section, reaction pipe section and exhaust pipe section before and after sampling, to prevent excessive air from entering the inside of the pipe body during the non-sampling stage, thereby preventing impurities in the air gas from entering the pipe body and affecting the air sampling volume and hydrogen chloride sampling volume. In addition, it prevents air gas from mixing into the pipe body during the non-sampling stage and affecting the hydrogen chloride measurement results. By setting a liquid addition part, it is convenient to add and control the alkaline absorption liquid inside the pipe body. By setting a connecting beam, the structure between the two ends of the reaction pipe section is connected, thereby increasing the stability of the overall structure. This solves the problem that in traditional hydrogen chloride sampling tubes, the entire structure is open before and after sampling, which can easily introduce additional air gas and interfere with the hydrogen chloride measurement results.

[0009] Furthermore, the reaction tube section is a porous glass plate absorption tube, comprising a first thin tube perpendicularly connected to the outlet end of the inlet tube section, a second thin tube perpendicularly connected to the inlet end of the exhaust tube section, a reaction spherical tube coaxially connected to the inlet end of the second thin tube, a reaction thick tube coaxially connected to the inlet end of the reaction spherical tube, and a U-shaped connecting tube connecting the first thin tube and the reaction thick tube. A porous glass plate is also provided at one end of the reaction thick tube near the U-shaped connecting tube. By using a porous glass plate absorption tube and utilizing the change in tube diameter, the contact area between hydrogen chloride gas in the air and the alkaline absorbent is increased, allowing the hydrogen chloride to be fully absorbed.

[0010] Furthermore, the intake seal includes a first connecting hose hinged to the outside of the intake end of the intake pipe section and an intake sealing plug disposed at the free end of the first connecting hose and detachably connected to the intake end of the intake pipe section for sealing. By providing the first connecting hose and the intake sealing plug, sealing the intake end of the intake pipe section is facilitated. The hinged connection between the first connecting hose and the intake pipe section facilitates the disassembly, assembly, and adjustment of the intake sealing plug.

[0011] Furthermore, the exhaust sealing component includes a second connecting hose hinged to the outside of the exhaust pipe section's outlet end and an exhaust sealing plug disposed at the free end of the second connecting hose and detachably connected to the exhaust pipe section's outlet end for sealing. The second connecting hose and exhaust sealing plug facilitate sealing the exhaust pipe section's outlet end, and the hinged connection between the second connecting hose and the exhaust pipe section facilitates the disassembly and adjustment of the exhaust sealing plug.

[0012] Furthermore, the liquid filling device includes a liquid filling pipe connected to the top end of the connection between the second thin tube and the exhaust pipe section, and a liquid filling sealing plug detachably and sealingly connected to the liquid filling pipe. The liquid filling pipe is coaxially connected to the second thin tube. By providing the liquid filling pipe and the liquid filling sealing plug, not only is it convenient to add alkaline absorbent liquid to the inside of the reaction tube section, but the airtightness of the tube body can also be ensured.

[0013] Furthermore, a sampling and sealing assembly is provided at one end of the inlet pipe section connected to the reaction pipe section. This assembly includes a sealing pipe connected to the top of the connection between the first thin tube and the inlet pipe section, and a sealing plug that is detachably and sealingly connected to the sealing pipe and can be inserted into the first thin tube for sealing. By providing the sealing plug, the gas flow through the first thin tube can be adjusted, thus promptly cutting off the gas path into the reaction pipe section when sufficient gas is sampled, strictly controlling the gas sampling amount. The sealing pipe also provides space for the installation and adjustment of the sealing plug, ensuring the overall airtightness of the pipe body. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of an air sampling tube for preventing contamination during hydrogen chloride sampling, as proposed in an embodiment of this application, is shown. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] The reference numerals in the accompanying drawings include: 1. Inlet pipe section; 2. Exhaust pipe section; 3. Connecting crossbeam; 4. First thin tube; 5. Second thin tube; 6. Reaction spherical tube; 7. Reaction thick tube; 8. U-shaped connecting tube; 9. Porous glass plate; 10. First connecting hose; 11. Inlet sealing plug; 12. Second connecting hose; 13. Exhaust sealing plug; 14. Liquid filling pipe; 15. Liquid filling sealing plug; 16. Gas sealing pipe; 17. Gas sealing plug.

[0018] An air sampling tube for preventing contamination during hydrogen chloride sampling, implementing, for example... Figure 1As shown: It includes an air inlet pipe section 1 for introducing air, a reaction pipe section for containing alkaline absorbent liquid, and an exhaust pipe section 2 for circulating gas into the air intake of the flue gas sampler. The reaction pipe section has a U-shaped structure. The air inlet end of the reaction pipe section is connected and fixed to the air outlet end of the air inlet pipe section 1, and the air outlet end of the reaction pipe section is connected and fixed to the air inlet end of the exhaust pipe section 2. The air outlet end of the exhaust pipe section 2 is sealed to the air intake of the flue gas sampler. An air inlet seal is installed at the air inlet end of the air inlet pipe section 1, and an exhaust seal is installed at the air outlet end of the exhaust pipe section 2. A liquid adding device for adding alkaline absorbent liquid into the reaction pipe section is provided on the end side of the reaction pipe section near the exhaust pipe section 2. The air inlet pipe section 1, the reaction pipe section, and the exhaust pipe section 2 are integrally formed structures, and a connecting beam 3 is provided between the inner sides of the two ends of the reaction pipe section.

[0019] The reaction tube section is a porous glass plate absorption tube, which includes a first thin tube 4 that is vertically connected to the outlet end of the inlet tube section 1, a second thin tube 5 that is vertically connected to the inlet end of the exhaust tube section 2, a reaction spherical tube 6 that is coaxially connected to the inlet end of the second thin tube 5, a reaction thick tube 7 that is coaxially connected to the inlet end of the reaction spherical tube 6, and a U-shaped connecting tube 8 that connects the first thin tube 4 and the reaction thick tube 7. A porous glass plate 9 is also provided at one end of the reaction thick tube 7 near the U-shaped connecting tube 8.

[0020] The intake sealing component includes a first connecting hose 10 hinged to the outside of the intake end of the intake pipe section 1 and an intake sealing plug 11 disposed at the free end of the first connecting hose 10 and detachably connected to the intake end of the intake pipe section 1 for sealing.

[0021] The exhaust sealing component includes a second connecting hose 12 hinged to the outside of the exhaust pipe section 2 and an exhaust sealing plug 13 disposed at the free end of the second connecting hose 12 and detachably connected to the exhaust pipe section 2 for sealing.

[0022] The liquid filling component includes a liquid filling pipe 14 connected to the top end of the connection between the second thin tube 5 and the exhaust pipe section 2, and a liquid filling sealing plug 15 detachably and sealingly connected to the liquid filling pipe 14. The liquid filling pipe 14 is coaxially connected to the second thin tube 5.

[0023] The sampling and sealing assembly is provided at one end of the air inlet pipe section 1 that connects to the reaction pipe section. The sampling and sealing assembly includes a sealing pipe 16 that connects to the top end of the connection between the first thin tube 4 and the air inlet pipe section 1, and a sealing plug 17 that is detachably and sealingly connected to the sealing pipe 16 and can be inserted into the first thin tube 4 for sealing.

[0024] In the specific implementation of this utility model, before sampling, the exhaust sealing plug 13, which is sealed and installed at the outlet end of the exhaust pipe section 2, is removed, and the outlet end of the exhaust pipe section 2 is sealed and connected to the inlet of the flue gas sampler. At the same time, the inlet sealing plug 11 and the inlet pipe section 1, the sealing block 17 and the sealing pipe 16, and the liquid filling plug and the liquid filling pipe 14 are all in a sealed and tight connection state. After the exhaust pipe section 2 is connected to the inlet of the flue gas sampler, alkaline absorbent is added into the pipe body. During operation, the liquid filling plug sealed and installed on the liquid filling pipe 14 is removed first, and then the alkaline absorbent is added into the second thin tube 5 through the liquid filling pipe 14. The alkaline absorbent entering the second thin tube 5 finally falls into the U-shaped connecting pipe 8. After the liquid addition is completed, the liquid filling plug is resealed and installed on the liquid filling pipe 14.

[0025] Then, air sampling begins. First, the flue gas sampler is turned on, and the air inlet sealing plug 11 is removed from the air inlet end of the air inlet pipe section 1. At the same time, the sealing block 17 is pulled upward along the sealing pipe 16 until the bottom of the sealing block 17 does not exceed the bottom end of the sealing pipe 16. The flue gas sampler draws in air from the air inlet pipe section 1, which flows sequentially through the first thin tube 4, the U-shaped connecting tube 8, the reaction thick tube 7, the reaction spherical tube 6, the second thin tube 5, and the exhaust pipe section 2. Finally, the air flows into the flue gas sampler from the exhaust pipe section 2 and is discharged into the environment from the flue gas sampler. In the U-shaped connecting tube 8, the air reacts with the alkaline absorbent and fully absorbs the hydrogen chloride in the air, thus completing the sampling of hydrogen chloride. After sampling, the sealing block 17 is pushed down to the bottom to completely seal the air inlet pipe section 1, and the bottom of the sealing block 17 extends into the first thin tube 4. Then, the exhaust pipe section 2 is disconnected from the air inlet of the flue gas sampler, and the second sealing plug is sealed to the air outlet of the exhaust pipe section 2. Finally, the first sealing plug is sealed to the air inlet of the air inlet pipe section 1, thus achieving the sampling and sealing of the sampled gas.

[0026] Compared with existing technologies, this invention provides sufficient reaction and air sampling space for hydrogen chloride sampling by setting up an integrally molded air intake pipe section 1, reaction pipe section, and exhaust pipe section 2. By setting air intake and exhaust seals at the ends of the air intake pipe section 1 and exhaust pipe section 2 respectively, it is easy to seal the inside of these pipe sections before and after sampling. This prevents excessive air from entering the pipe body during non-sampling stages, thus preventing impurities in the air from entering the pipe body and affecting the air and hydrogen chloride sampling amounts. Furthermore, it prevents air from mixing into the pipe body during non-sampling stages, which could affect the hydrogen chloride measurement results. Furthermore, the integrated air sampling tube structure makes the entire structure more convenient to use, enabling unified packaging before and after sampling, and direct connection to the equipment during sampling. This reduces direct human contact with the tube and minimizes sample contamination during sampling. The addition of a liquid-adding component facilitates the addition and control of alkaline absorbent solution inside the tube. The connecting beam 3 connects the two ends of the reaction tube, increasing the overall structural stability. This solves the problem of traditional hydrogen chloride sampling tubes where the air is constantly circulating before and after sampling, easily introducing additional air gas and interfering with the hydrogen chloride measurement results.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An air sampling tube for preventing contamination during hydrogen chloride sampling, characterized in that: The device includes an air inlet pipe section for introducing air, a reaction pipe section for containing alkaline absorbent liquid, and an exhaust pipe section for circulating gas into the intake port of a flue gas sampler. The reaction pipe section has a U-shaped structure. The air inlet end of the reaction pipe section is connected and fixedly connected to the air outlet end of the air inlet pipe section, and the air outlet end of the reaction pipe section is connected and fixedly connected to the air inlet end of the exhaust pipe section. The air outlet end of the exhaust pipe section is sealed to the intake port of the flue gas sampler. An air inlet seal is installed at the air inlet end of the air inlet pipe section, and an exhaust seal is installed at the air outlet end of the exhaust pipe section. A liquid filling device for adding alkaline absorbent liquid into the reaction pipe section is provided on the end side of the reaction pipe section near the exhaust pipe section. The air inlet pipe section, the reaction pipe section, and the exhaust pipe section are integrally formed. A connecting beam is provided between the inner sides of the two ends of the reaction pipe section.

2. The air sampling tube for preventing contamination during hydrogen chloride sampling according to claim 1, characterized in that, The reaction tube section is a porous glass plate absorption tube, which includes a first thin tube that is vertically connected to the outlet end of the inlet tube section, a second thin tube that is vertically connected to the inlet end of the exhaust tube section, a reaction spherical tube that is coaxially connected to the inlet end of the second thin tube, a reaction thick tube that is coaxially connected to the inlet end of the reaction spherical tube, and a U-shaped connecting tube that connects the first thin tube and the reaction thick tube. A porous glass plate is also provided at one end of the reaction thick tube near the U-shaped connecting tube.

3. The air sampling tube for preventing contamination during hydrogen chloride sampling according to claim 2, characterized in that, The intake seal includes a first connecting hose hinged to the outside of the intake end of the intake pipe section and an intake sealing plug disposed at the free end of the first connecting hose and detachably connected to the intake end of the intake pipe section for sealing.

4. The air sampling tube for preventing contamination during hydrogen chloride sampling according to claim 3, characterized in that, The exhaust sealing element includes a second connecting hose hinged to the outside of the exhaust pipe section's outlet end and an exhaust sealing plug disposed at the free end of the second connecting hose and detachably connected to the exhaust pipe section's outlet end for sealing.

5. The air sampling tube for preventing contamination during hydrogen chloride sampling according to claim 4, characterized in that, The liquid filling device includes a liquid filling pipe connected to the top end of the connection between the second thin tube and the exhaust pipe section, and a liquid filling sealing plug that is detachably and sealingly connected to the liquid filling pipe. The liquid filling pipe is coaxially connected to the second thin tube.

6. The air sampling tube for preventing contamination during hydrogen chloride sampling according to claim 2, characterized in that, The end of the air inlet pipe section connected to the reaction pipe section is provided with a sampling and sealing assembly. The sampling and sealing assembly includes a sealing pipe connected to the top end of the connection between the first thin tube and the air inlet pipe section, and a sealing plug block that is detachably and sealingly connected to the sealing pipe and can be inserted into the first thin tube for sealing.

Images