A solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas

Abstract

The present invention belongs to the technical field of hydrogen peroxide calibration standard gas, and specifically relates to a solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas. The device includes a solution atomizing volatilizer, a first air duct, a filter volatilizer, a second air duct, a filter filter demister, a third air duct, and a return air duct. The first air duct connects the liquid atomizing volatilizer with the filter volatilizer; the second air duct connects the filter volatilizer with the filter filter demister. The independent solution atomizing volatilizer, filter volatilizer and filter filter demister of the present invention can cause the air-solution system to quickly approach the equilibrium point. The return air circuit of the present invention forms a closed circulation air circuit with the solution atomizing volatilizer, filter volatilizer and filter filter demister. The standard gas used is only a small part of the circulating gas volume. The gas is continuously circulated between the devices to achieve equilibrium volatilization, and the generated standard gas is closer to the theoretical calculated value.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen peroxide calibration standard gas, in particular to a solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas. Background Art

[0002] Hydrogen peroxide is widely used as a bleaching agent or disinfectant in papermaking, printing and dyeing, medicine and other fields. The occupational health standard GBZ 2.1-2019 strictly limits the PC-TWA of hydrogen peroxide in the workplace air to 1.5mg / m 3 (1ppm). Therefore, such workplaces require low-concentration (≤10ppm) gaseous hydrogen peroxide detection equipment (such as electrochemical sensors). Regular calibration and verification of hydrogen peroxide detection equipment requires calibration gas. The easy decomposition and absorption of gaseous hydrogen peroxide by water necessitates that such calibration gas be prepared on-site during equipment calibration and cannot be prefabricated or stored for long-term backup.

[0003] Most existing technologies focus on protecting calibration equipment and calibration methods, but do not pay attention to the generation of standard gas, which is crucial to the accuracy of calibration. Summary of the Invention

[0004] The present invention provides a solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas. The device prepares the calibration standard gas on site, and the use of the device makes the standard gas generation process closer to the equilibrium state, and the generated standard gas is closer to the theoretical calculated value.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas, comprising a solution atomizing volatilizer, a first air duct, a filter volatilizer, a second air duct, a filter filter demister, a third air duct, and a return air duct, wherein:

[0006] The solution atomizing and evaporating device comprises an air inlet pipe, a solution atomizing and evaporating device housing, a liquid supply pipe, a liquid supply bottle, an atomizer, a first liquid storage tray, and a first gas collecting hood;

[0007] One end of the air inlet pipe is provided with an air inlet, and the other end is connected to the solution atomizing evaporator housing; one end of the liquid supply pipe is connected to the liquid supply bottle, and the other end extends into the solution atomizing evaporator housing and an atomizer is provided at the end; a first liquid storage tray is provided in the solution atomizing evaporator housing near the lower end, and a first gas collecting hood is provided on the first liquid storage tray;

[0008] One end of the first air guide pipe extends into the solution atomizing evaporator housing and is connected to the first gas collecting cover, and the other end is connected to the filter evaporator;

[0009] The filter volatilizer includes a filter volatilizer housing, a second liquid storage tray, a volatilization filter, and a second gas collecting hood;

[0010] The filter evaporator housing is connected to the gas flowing through the first gas collecting hood after atomization and volatilization in the solution atomization evaporator through the first air duct; the second liquid storage tray is arranged near the lower end of the filter evaporator housing;

[0011] The volatile filter is in a truncated cone shape and has a plurality of air holes. The bottom of the volatile filter is located in the second liquid storage tray, and the top of the volatile filter is provided with a second gas collecting cover.

[0012] One end of the second air duct extends into the filter evaporator housing and is connected to the second air collecting hood, and the other end is connected to the filter demister;

[0013] The filter screen demister comprises a filter screen demister housing, a filter screen, a third liquid storage tray, a third air collecting hood and a third air guide pipe;

[0014] The filter screen filters the demister housing through the second air duct, which is connected to the filter screen volatilizer, and then passes through the volatilization filter and flows through the second gas collecting cover; the third liquid storage tray is arranged near the lower end of the filter screen filter demister housing;

[0015] The filter screen is in a truncated cone shape, the bottom of the filter screen is located in the third liquid storage tray, and the top of the filter screen is provided with a third gas collecting cover;

[0016] One end of the third air guide pipe extends into the filter demister housing and is connected to the third air collecting hood, and the other end is provided with a standard gas outlet;

[0017] One end of the return air pipe is connected to the air inlet pipe, and the other end is connected to the third air guide pipe. The return air pipe and the solution atomizing volatilizer, the filter volatilizer, and the filter filter demister form a closed circulation gas circuit. The exported standard gas used is ≤10% of the total circulating gas volume. The gas continuously circulates between the return air pipe and the solution atomizing volatilizer, the filter volatilizer, and the filter filter demister to achieve balanced volatilization.

[0018] As a further preferred embodiment of the present invention, the system further comprises four air heaters, four booster air pumps, five temperature and pressure sensors, and five air valves, wherein:

[0019] Air heaters, booster air pumps, temperature and pressure sensors and air valves are provided on the air intake pipe, the first air duct, the second air duct and the return air duct; a temperature and pressure sensor and an air valve are provided near the outlet end of the standard gas on the third air duct.

[0020] As a further preferred embodiment of the present invention, it further comprises three drainage ports, a first conduit, and a second conduit, wherein:

[0021] The three drain ports are respectively arranged at the bottom of the solution atomizing volatilizer, the filter volatilizer and the filter demister;

[0022] One end of the first conduit is connected to the bottom of the second liquid storage tray, and the other end is connected to the drain port at the bottom of the filter volatilizer;

[0023] One end of the second conduit is communicated with the bottom of the third liquid storage tray, and the other end is connected to the drain port at the bottom of the filter screen demister.

[0024] As a further preferred embodiment of the present invention, it further comprises a plurality of first liquid-absorbing cottons, a plurality of branch conduits and a main liquid supply conduit, wherein:

[0025] Several first liquid-absorbing cottons are arranged along the outer circle of the top of the volatile filter; one end of each branch conduit is in contact with a first liquid-absorbing cotton, and the other end of each branch conduit is gathered at one point and connected to one end of the main liquid supply conduit; the other end of the main liquid supply conduit is connected to the liquid supply bottle.

[0026] As a further preferred embodiment of the present invention, it further comprises a second liquid-absorbing cotton, which is arranged in a plurality of branch ducts.

[0027] As a further preferred embodiment of the present invention, it further comprises two flow control pumps, which are respectively arranged on the liquid supply pipe and the main liquid supply conduit.

[0028] As a further preferred embodiment of the present invention, a gas one-way check valve is provided on the liquid supply bottle to prevent convection of internal and external gases.

[0029] As a further preferred embodiment of the present invention, the first air collecting hood, the second air collecting hood and the third air collecting hood are all funnel-shaped.

[0030] As a further preferred embodiment of the present invention, the first gas collecting hood is buckled on the first liquid storage tray, and the lower opening of the first gas collecting hood is below the liquid level in the first liquid storage tray.

[0031] Through the above technical solution, compared with the existing technology, the present invention has the following beneficial effects:

[0032] 1. The independent solution atomizing volatilizer, filter volatilizer and filter demister of the present invention can promote the air-solution system to approach the equilibrium point quickly.

[0033] 2. The return gas path of the present invention forms a closed circulation gas path with the solution atomizing volatilizer, the filter volatilizer, and the filter filtration demister. The derived standard gas only accounts for a small part of the circulating gas volume. The gas continuously circulates between the devices to achieve balanced volatilization, and the generated standard gas is closer to the theoretical calculated value.

[0034] 3. The present invention arranges multiple air heaters, booster air pumps, temperature and pressure sensors, and air valves in the air path of the balanced volatilization equipment, which can accurately control the balanced volatilization of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings and examples.

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0037] In the figure: 1. Solution atomizing and evaporating device; 11. Liquid supply bottle; 12. Atomizer; 13. Solution atomizing and evaporating device housing; 14. First gas collecting hood; 15. First liquid storage tray; 16. First air guide tube; 17. Liquid supply tube; 18. Air inlet tube;

[0038] 2. Filter volatilizer; 21. Filter volatilizer housing; 22. Volatilization filter; 23. Second liquid storage tray; 24. Second gas collection hood; 25. Second air duct; 26. Branch conduit; 27. Main liquid supply conduit; 28. First absorbent cotton; 29. ​​First conduit;

[0039] 3. Filter screen for demister; 31. Filter screen for demister housing; 32. Filter screen; 33. Third liquid storage tray; 34. Third air collecting hood; 35. Third air duct; 36. Second conduit;

[0040] 4. Drain port; 5. Flow control pump; 6. Air heater; 7. Booster air pump; 8. Temperature and pressure sensor; 9. Air valve; 10. Return air pipe. DETAILED DESCRIPTION

[0041] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0042] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of components and therefore should not be construed as limitations on the present invention. The specific dimensions used in this embodiment are intended only to illustrate the technical solution and do not limit the scope of protection of the present invention.

[0043] Example 1

[0044] This embodiment provides a preferred embodiment, a solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas, such as Figure 1 As shown, the device includes a solution atomizing volatilizer 1, a first air duct 16, a filter volatilizer 2, a second air duct 25, a filter demister 3, a third air duct 35, a return air pipe 10, and three drain ports 4. The three drain ports 4 are respectively arranged at the bottom of the solution atomizing volatilizer 1, the filter volatilizer 2, and the filter demister 3, wherein:

[0045] The solution atomizing and evaporating device 1 comprises an air inlet pipe 18 , a solution atomizing and evaporating device housing 13 , a liquid supply pipe 17 , a liquid supply bottle 11 , an atomizer 12 , a first liquid storage tray 15 , and a first gas collecting hood 14 .

[0046] One end of the air inlet pipe 18 is provided with an air inlet, and the other end is connected to the solution atomizing evaporator housing 13. One end of the liquid supply pipe 17 is connected to the liquid supply bottle 11, and the other end extends into the solution atomizing evaporator housing 13 and an atomizer 12 is provided at the end. Preferably, the atomizer 12 is an ultrasonic atomizer. Furthermore, a gas one-way check valve is provided on the liquid supply bottle 11, and the internal gas flows out without hindering the entry of external gas; a flow control pump 5 is provided on the liquid supply pipe 17 to control the solution flow for the atomizer 12. The first liquid storage tray 15 is arranged near the lower end position in the solution atomizing evaporator housing 13, and the first gas collecting hood 14 is arranged on the first liquid storage tray 15. Preferably, the first gas collecting hood 14 is funnel-shaped.

[0047] One end of the first air guide pipe 16 extends into the solution atomizing volatilizer housing 13 and is connected to the first gas collecting cover 14 , and the other end is connected to the filter volatilizer 2 .

[0048] Specifically, the atomized and volatilized gas flows through a funnel-shaped first gas collection hood 14 and a first air duct 16 into the filter volatilizer 2. The first gas collection hood 14 is mounted within a first liquid reservoir 15, which collects settled liquid mist. When the first gas collection hood 14 is in operation, its lower opening is below the liquid level in the first liquid reservoir 15, preventing the ingress of atomized liquid droplets. If the first liquid reservoir 15 contains too much solution, it will overflow into the solution atomizer 1 and then be discharged through the drain port 4 at the bottom of the solution atomizer 1.

[0049] The filter volatilizer 2 includes a filter volatilizer housing 21 , a second liquid storage tray 23 , a volatilization filter 22 , and a second gas collecting hood 24 .

[0050] The filter volatilizer housing 21 receives the gas that flows through the first gas collecting hood 14 after atomization and volatilization in the solution atomizer volatilizer 1 through the first air duct 16. The second liquid storage tray 23 is arranged near the lower end of the filter volatilizer housing 21. The volatile filter (22) is truncated and has a plurality of air holes formed on the volatile filter 22 to facilitate airflow. The bottom of the volatile filter 22 is located in the second liquid storage tray 23, and the top of the volatile filter 22 is provided with a second gas collecting hood 24.

[0051] The filter volatilizer 2 is provided with a first conduit 29, one end of which is connected to the bottom of the second liquid storage tray 23, and the other end is connected to the drain port 4 at the bottom of the filter volatilizer 2. Preferably, the second gas collecting hood 24 is funnel-shaped.

[0052] Specifically, the bottom of the volatile filter 22 is immersed in the second liquid storage pan 23. When the second liquid storage pan 23 contains too much liquid, the excess liquid is discharged from the drain port 4 connected to the first conduit 29 at the bottom of the second liquid storage pan 23. The upper outlet of the volatile filter 22 is connected to the funnel-shaped second gas collection hood 24. Gas passes through the volatile filter 22 from the side, flows through the second gas collection hood 24 and the second air duct 25, and enters the filter demister 3.

[0053] This embodiment also includes a number of first liquid-absorbing cottons 28, a number of branch ducts 26, a main liquid supply duct 27, and a second liquid-absorbing cotton. The first liquid-absorbing cotton 28 is made of a hydrophilic material; the first liquid-absorbing cotton 28 is arranged along the outer ring of the top of the volatile filter 22; one end of each branch duct 26 is in contact with a first liquid-absorbing cotton 28, and the other end of each branch duct 26 is gathered at one point and connected to one end of the main liquid supply duct 27; the other end of the main liquid supply duct 27 is connected to the liquid supply bottle 11. The second liquid-absorbing cotton is arranged in the branch ducts 26. A flow control pump 5 is set in the main liquid supply duct 27 pipeline, and the flow control pump 5 controls the liquid flow; the second liquid-absorbing cotton in the branch duct 26 and the first liquid-absorbing cotton 28 on the outer ring of the top of the volatile filter 22 both play a role in uniform liquid supply. When the solution flows from the main liquid supply conduit 27 through the branch conduit 26, the second liquid absorbent cotton, the first liquid absorbent cotton 28, and the volatile filter 22 in sequence, the capillary action of the second liquid absorbent cotton, the first liquid absorbent cotton 28 and the volatile filter 22 eventually causes the solution to be evenly supplied to the top of the volatile filter 22.

[0054] One end of the second air duct 25 extends into the filter evaporator housing 21 and is connected to the second air collecting cover 24 , and the other end is connected to the filter demister 3 .

[0055] The filter demister 3 includes a filter demister housing 31 , a filter screen 32 , a third liquid storage tray 33 , a third air collecting hood 34 and a third air guide pipe 35 .

[0056] The above-mentioned filter filter demister housing 31 is connected to the filter volatilizer 2 through the second air duct 25, and the gas passes through the volatile filter 22 and flows through the second air collecting hood 24. The third liquid storage tray 33 is arranged in the filter filter demister housing 31 near the lower end; the filter screen 32 is truncated cone-shaped, the bottom of the filter screen 32 is located in the third liquid storage tray 33, and the top of the filter screen 32 is provided with a third air collecting hood 34. One end of the third air duct 35 extends into the filter filter demister housing 31 and is connected to the third air collecting hood 34, and the other end is provided with a standard gas outlet. The filter filter demister 3 is equipped with a second conduit 36, one end of the second conduit 36 ​​is connected to the bottom of the third liquid storage tray 33, and the other end is connected to the drain port 4 at the bottom of the filter filter demister 3. Preferably, the third air collecting hood 34 is funnel-shaped.

[0057] Specifically, the gas passes through the filter screen 32 from the side, flows through the third gas collection cover 34, and flows out of the third air duct 35. The solution filtered by the filter screen 32 is collected in the third liquid storage pan 33 and needs to be discharged in a timely manner through the second conduit 36 ​​at the bottom of the third liquid storage pan 33 and the drain port 4 at the bottom of the filter screen demister 3.

[0058] One end of the return air pipe 10 is connected to the air inlet pipe 18, and the other end is connected to the third air guide pipe 35. The return air pipe 10 forms a closed circulation air circuit with the solution atomizing volatilizer 1, the filter volatilizer 2, and the filter filter demister 3. The derived standard gas used is ≤10% of the total circulating gas volume. The gas continuously circulates between the return air pipe 10, the solution atomizing volatilizer 1, the filter volatilizer 2, and the filter filter demister 3 to achieve balanced volatilization.

[0059] This embodiment also includes four air heaters 6, four booster pumps 7, five temperature and pressure sensors 8, and five air valves 9. These are installed on the intake pipe 18, the first air duct 16, the second air duct 25, and the return air duct 10. A temperature and pressure sensor 8 and air valve 9 are located near the outlet of the standard gas in the third air duct 35. These four air heaters 6, four booster pumps 7, five temperature and pressure sensors 8, and five air valves 9 enable precise control of the equilibrium volatilization of the solution.

[0060] Calibration of low-concentration (≤10ppm) gaseous hydrogen peroxide detection equipment requires accurate calibration gas. However, due to the easy decomposition and absorption of gaseous hydrogen peroxide by water, such calibration gas can only be prepared on-site during equipment calibration and cannot be pre-made or stored for long-term backup. Hydrogen peroxide solution, on the other hand, is more stable, and the concentration testing methods and technology for hydrogen peroxide solution are more mature, resulting in higher test precision and accuracy.

[0061] The partial pressure of gaseous hydrogen peroxide in the air in a two-phase system of dilute hydrogen peroxide solution and air satisfies Henry's law. Under isothermal and isobaric conditions, the solubility of a volatile solute in the solution is proportional to the equilibrium pressure of the solute on the liquid surface:

[0062] P hp =H c,hp ×c hp

[0063] in:

[0064] P hp is the partial pressure of hydrogen peroxide in the gas, H c,hp is Henry's constant, c hp is the molar concentration of hydrogen peroxide solution.

[0065] In this embodiment, a hydrogen peroxide solution of known concentration is added to generate a hydrogen peroxide calibration standard gas under equilibrium conditions, and the standard gas concentration is calculated using the Henry's law calculation formula and the known Henry's constant. Calibration standard gases of different concentrations can be prepared using hydrogen peroxide solutions of different concentrations.

[0066] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such herein, will not be interpreted in an idealized or overly formal sense.

[0067] The meaning of "and / or" in this application means that both situations where each exists alone or both exist at the same time are included.

[0068] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.

[0069] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas, characterized by: The invention comprises a solution atomizing volatilizer (1), a first air duct (16), a filter volatilizer (2), a second air duct (25), a filter demister (3), a third air duct (35), and a return air duct (10), wherein: The solution atomizing and evaporating device (1) comprises an air inlet pipe (18), a solution atomizing and evaporating device housing (13), a liquid supply pipe (17), a liquid supply bottle (11), an atomizer (12), a first liquid storage tray (15), and a first gas collecting hood (14); An air inlet is provided at one end of the air inlet pipe (18), and the other end is communicated with the solution atomizing evaporator housing (13); one end of the liquid supply pipe (17) is connected to the liquid supply bottle (11), and the other end extends into the solution atomizing evaporator housing (13) and an atomizer (12) is provided at the end; a first liquid storage tray (15) is provided in the solution atomizing evaporator housing (13) near the lower end, and a first gas collecting hood (14) is provided on the first liquid storage tray (15); One end of the first air guide pipe (16) extends into the solution atomizing evaporator housing (13) and is connected to the first gas collecting cover (14), and the other end is connected to the filter evaporator (2); The filter volatilizer (2) comprises a filter volatilizer housing (21), a second liquid storage tray (23), a volatilization filter (22), and a second gas collecting hood (24); The filter volatilizer housing (21) is connected to the gas flowing through the first gas collecting cover (14) after atomization and volatilization in the solution atomization volatilizer (1) through the first air guide pipe (16); the second liquid storage tray (23) is arranged in the filter volatilizer housing (21) near the lower end; The volatile filter (22) is in a truncated cone shape, and a plurality of air holes are provided on the volatile filter (22). The bottom of the volatile filter (22) is located in the second liquid storage tray (23), and the top of the volatile filter (22) is provided with a second gas collecting cover (24); One end of the second air guide pipe (25) extends into the filter evaporator housing (21) and is connected to the second air collecting cover (24), and the other end is connected to the filter filter demister (3); The filter screen demister (3) comprises a filter screen demister housing (31), a filter screen (32), a third liquid storage tray (33), a third air collecting hood (34) and a third air guide pipe (35); The filter screen filters the demister housing (31) through the second air guide pipe (25) and receives the gas in the filter screen volatilizer (2) that passes through the volatilization filter (22) and then flows through the second gas collecting cover (24); the third liquid storage tray (33) is arranged in the filter screen filter demister housing (31) near the lower end; The filter screen (32) is in a truncated cone shape, the bottom of the filter screen (32) is located in the third liquid storage tray (33), and the top of the filter screen (32) is provided with a third gas collecting cover (34); One end of the third air guide pipe (35) extends into the filter screen demister housing (31) and is connected to the third air collecting hood (34), and the other end is provided with a standard gas outlet; One end of the return air pipe (10) is connected to the air inlet pipe (18), and the other end is connected to the third air guide pipe (35). The return air pipe (10) forms a closed circulation gas path with the solution atomizing volatilizer (1), the filter volatilizer (2), and the filter filter demister (3). The derived standard gas used is ≤10% of the total circulation gas volume. The gas continuously circulates between the return air pipe (10) and the solution atomizing volatilizer (1), the filter volatilizer (2), and the filter filter demister (3) to achieve balanced volatilization.

2. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: It also includes four air heaters (6), four booster air pumps (7), five temperature and pressure sensors (8) and five air valves (9), wherein: An air heater (6), a booster air pump (7), a temperature and pressure sensor (8) and an air valve (9) are provided on the air inlet pipe (18), the first air guide pipe (16), the second air guide pipe (25) and the return air pipe (10); and a temperature and pressure sensor (8) and an air valve (9) are provided near the outlet end of the standard gas on the third air guide pipe (35).

3. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: It also includes three drainage ports (4), a first conduit (29), and a second conduit (36), wherein: Three liquid discharge ports (4) are respectively arranged at the bottom of the solution atomizing volatilizer (1), the filter volatilizer (2) and the filter filtration demister (3); One end of the first conduit (29) is connected to the bottom of the second liquid storage tray (23), and the other end is connected to the drain port (4) at the bottom of the filter volatilizer (2); One end of the second conduit (36) is connected to the bottom of the third liquid storage tray (33), and the other end is connected to the drain port (4) at the bottom of the filter screen demister (3).

4. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: It also includes a plurality of first liquid-absorbing cottons (28), a plurality of branch conduits (26) and a main liquid supply conduit (27), wherein: A plurality of first liquid-absorbing cottons (28) are arranged along the outer circle of the top of the volatile filter (22); one end of each branch conduit (26) is in contact with a first liquid-absorbing cotton (28); the other end of each branch conduit (26) is gathered at one point and connected to one end of the main liquid supply conduit (27); the other end of the main liquid supply conduit (27) is connected to the liquid supply bottle (11).

5. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 4, characterized in that: It also includes a second liquid-absorbing cotton, which is arranged in a plurality of branch ducts (26).

6. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 4, characterized in that: It also includes two flow control pumps (5), which are respectively arranged on the liquid supply pipe (17) and the main liquid supply conduit (27).

7. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: A gas one-way check valve is provided on the liquid supply bottle (11) to prevent internal and external gas convection.

8. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: The first air collecting hood (14), the second air collecting hood (24) and the third air collecting hood (34) are all funnel-shaped.

9. The solution equilibrium volatilization device for generating hydrogen peroxide calibration standard gas according to claim 1, characterized in that: The first air collecting hood (14) is buckled on the first liquid storage tray (15), and the lower opening of the first air collecting hood (14) is below the liquid level in the first liquid storage tray (15).

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