CN210719905U - Humidifying device for VOCs gas - Google Patents
Humidifying device for VOCs gas Download PDFInfo
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- CN210719905U CN210719905U CN201921613569.XU CN201921613569U CN210719905U CN 210719905 U CN210719905 U CN 210719905U CN 201921613569 U CN201921613569 U CN 201921613569U CN 210719905 U CN210719905 U CN 210719905U
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Abstract
The utility model discloses a gaseous humidification device of VOCs, including the box with locate sampling system, gasification system, gas distribution system and the control system on the box, the utility model discloses can provide gaseous humidification under the different pressure environment, can effectually reduce the interference or the pollution that probably introduces of humidification in-process, whole device is simply easily operated, and built-in dynamic dilution system conveniently provides required standard gas when humidity, reduces the loss of VOCs component at jar internal portion, can cooperate the static dilution system that the market was sold, only provides the humidification function.
Description
The technical field is as follows:
the utility model relates to a gaseous humidification device of VOCs.
Background art:
volatile Organic Compounds (VOCs) are Compounds commonly existing in the atmosphere, and generally refer to Organic Compounds which are Volatile at normal temperature, have high saturated vapor pressure in a standard state, small relative molecular weight, low boiling point and large henry constant. The composition of atmospheric VOCs is very complex and mainly includes alkanes, halogenated alkanes, alkenes, halogenated alkenes, aromatics, and hundreds of organic compounds such as aldehydes, ketones, phenols, alcohols, ethers, esters, nitrates, and the like. VOCs are very important trace components of atmospheric troposphere, play an extremely important role in atmospheric chemical process, and have important influence on the aspects of secondary organic pollution formation, atmospheric oxidation capacity, human health and the like. At present, a large number of mature and reliable methods are available for analyzing and detecting all-component VOCs in air, a calibration curve can be established by using multi-component standard gas in the analysis process, but the current commercially available certified standard samples are dry standard gas, environment samples are gas containing certain humidity, the state difference of the two is large, and the analysis and detection process is greatly influenced. In addition, in the process of establishing a standard curve, the Suma tank is adopted to store VOCs standard gases with different concentration gradients, and researches of scholars show that the VOCs gases stored in the Suma tank are beneficial to reducing the loss of active components caused by the wall adsorption effect of the tank body under certain humidity, and the accuracy of analysis is improved.
The traditional dynamic or static gas distribution instrument has no humidifying function, and part of scholars adopt a needle cylinder to extract certain deionized water and directly inject the deionized water into a vacuum tank body for humidifying in the experimental process, so that the method can not ensure the complete gasification of the injected deionized water, and impurities are possibly introduced due to manual operation.
The invention content is as follows:
the utility model provides a gaseous humidification device of VOCs for under the different pressure environment to providing certain humidity diluting the gaseous in-process of VOCs, reduce the adsorption loss of VOCs when the storage of Suma jar, avoid introducing impurity interference or polluting the sample simultaneously.
The utility model discloses the technical scheme who adopts has:
a humidifying device for VOCs gas comprises a box body, and a sample injection system, a gasification system, a gas distribution system and a control system which are arranged on the box body, wherein the sample injection system comprises a nitrogen port, a three-way conversion valve, a water filling port, a first mass flowmeter and a stainless steel pipeline, the nitrogen port, the water filling port and the stainless steel pipeline are respectively correspondingly communicated with three valve ports of the three-way conversion valve, and the first mass flowmeter is connected between the nitrogen port and the corresponding valve port of the three-way conversion valve;
the gasification system comprises a stainless steel tank, a heating box, a temperature and humidity sensor, a stop valve and a water outlet, wherein the stainless steel tank is arranged in the heating box, the heating box indirectly heats the stainless steel tank by circularly heating air flow in the box body, the heating temperature of the heating box and the humidity in the stainless steel tank are monitored by the temperature and humidity sensor, the lower end of the stainless steel tank is connected with the stop valve and the water outlet, and the upper end of the stainless steel tank is connected with a stainless steel pipeline;
the gas distribution system comprises a standard gas port, a gas outlet, a first electromagnetic valve, a second mass flowmeter, a second electromagnetic valve, a safety valve and a gas outlet, wherein the standard gas port, the gas outlet and the gas outlet are respectively and correspondingly connected with the stainless steel tank through three pipeline branches, the first electromagnetic valve and the second mass flowmeter are connected to a pipeline branch of the standard gas port, and the second electromagnetic valve and the safety valve are connected to a pipeline branch of the gas outlet;
the control system comprises a controller and a control panel, the controller is connected with the control panel, and the three-way conversion valve, the first mass flow meter, the temperature and humidity sensor, the first electromagnetic valve, the second mass flow meter, the second electromagnetic valve and the safety valve are correspondingly connected with the controller.
Further, the nitrogen port is connected with a hydrocarbon removal trap.
Further, the stainless steel tank has a volume within 500 mL.
Further, the stainless steel tank is made of 316 stainless steel, and the inner surface of the stainless steel tank is subjected to electro-polishing and passivation treatment.
Further, the discharge pressure of the safety valve is 50 psia.
The utility model discloses following beneficial effect has:
1) the utility model discloses can provide gas humidification under for different pressure environment.
2) The utility model discloses interference or pollution that probably introduces in can effectual reduction humidification process.
3) Whole device is simple easy to operate, and built-in developments dilute the system, prepares required standard gas when conveniently providing humidity, reduces the loss of VOCs component in jar internal portion.
4) The utility model discloses also can cooperate the commercial static state system of diluting, only provide the humidification function.
Description of the drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
Fig. 3 is a schematic flow chart of the operation of the present invention.
The device comprises a 1-nitrogen port, a 2-three-way change-over valve, a 3-water filling port, a 4-standard gas port, a 5-control panel, a 6-box body, a 7-gas outlet, a 8-first mass flow meter, a 9-stainless steel pipeline, a 10-stainless steel tank, a 11-heating box, a 12-temperature and humidity sensor, a 13-first electromagnetic valve, a 14-second mass flow meter, a 15-second electromagnetic valve, a 16-safety valve, a 17-gas outlet, a 18-stop valve and a 19-water outlet.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, the utility model relates to a humidifying device for VOCs gases, which comprises a box body 6 and a sample introduction system, a gasification system, a gas distribution system and a control system which are arranged on the box body 6.
The sampling system comprises a nitrogen port 1, a three-way conversion valve 2, a water filling port 3, a first mass flowmeter 8 and a stainless steel pipeline 9, wherein the nitrogen port 1, the three-way conversion valve 2 and the water filling port 3 are arranged on the outer side of a box body 6, the first mass flowmeter 8 and the stainless steel pipeline 9 are arranged on the inner side of the box body 6, the nitrogen port 1, the water filling port 3 and the stainless steel pipeline 9 are respectively communicated with three valve ports of the three-way conversion valve 2 correspondingly, and the first mass flowmeter 8 is connected in front of the three-way conversion valve 2 and behind the nitrogen port 1. The three-way change-over valve 2 can be freely switched between the water filling port 3 and the nitrogen port 1, so that one way is kept smooth, and the two inlets can be sealed.
Gasification system includes stainless steel tank 10, heating cabinet 11, temperature and humidity sensor 12, stop valve 18 and outlet 19, stainless steel tank 10, heating cabinet 11 and temperature and humidity sensor 12 locate the inboard of box 6, stop valve 18 and outlet 19 locate the outside of box 6, stainless steel tank 10 is arranged in heating cabinet 11, heating cabinet 11 heats stainless steel tank 10 indirectly through the air current circulation heating to in the box 6, the temperature of heating cabinet 11 heating and the humidity in the stainless steel tank 10 pass through temperature and humidity sensor 12 and monitor, stop valve 18 and outlet 19 are connected to the lower extreme of stainless steel tank 10, stop valve 18 door is closed during the use, can open the valve and put out the water in the jar during shut down. The upper end of the stainless steel tank 10 is connected with the stainless steel pipeline 9.
The gas distribution system comprises a standard gas port 4, a gas outlet 7, a first electromagnetic valve 13, a second mass flow meter 14, a second electromagnetic valve 15, a safety valve 16 and a gas outlet 17, wherein the standard gas port 4, the gas outlet 7 and the gas outlet 17 are arranged on the outer side of the box body 6, the standard gas port 4, the gas outlet 7 and the gas outlet 17 are respectively and correspondingly connected with the stainless steel tank 10 through three pipeline branches, the first electromagnetic valve 13 and the second mass flow meter 14 are connected on the pipeline branch of the standard gas port 4, and the second electromagnetic valve 15 and the safety valve 16 are connected on the pipeline branch of the gas outlet 17.
The second mass flow meter 14 is positioned between the standard gas port 4 and the first electromagnetic valve 13 and controls the sample introduction flow rate of the standard gas; the first electromagnetic valve 13 and the second electromagnetic valve 15 are used for controlling the opening and closing of the gas path, and the exhaust port 17 is used for generating waste gas; the safety valve 16 can be deflated when the pressure in the system is too high, so that danger is avoided.
The control system comprises a controller and a control panel 5, the controller is connected with the control panel 5, and the three-way conversion valve 2, the first mass flow meter 8, the temperature and humidity sensor 12, the first electromagnetic valve 13, the second mass flow meter 14, the second electromagnetic valve 15 and the safety valve 16 are correspondingly connected with the controller. The controller mainly records monitored parameters, controls the electromagnetic valve and sets required parameter information.
The nitrogen port 1 is connected with a hydrocarbon removal trap.
The utility model discloses well stainless steel jar 10 volume is within 500mL, and the material of stainless steel jar 10 is 316 stainless steel, and the internal surface is through electropolishing and passivation treatment.
The utility model discloses in the material of all interfaces and valves be 316 stainless steel, the inside passivation of pipe wall.
The discharge pressure of the relief valve 16 is 50 psia.
When the device is used, the three-way conversion valve 2 is opened, the water is switched to the water filling port 3, the water with the volume of 1/3 stainless steel tanks is added inwards, then the nitrogen port 1 is switched, the two mass flow meters are adjusted to control the air inlet flow rate, and the whole system pipeline is purged for 1-5 min.
And (3) closing the three-way conversion valve 2, connecting the suma tank into the air outlet, and screwing down without opening the valve. The jar body size of selecting to prepare in control panel department, the humidity that needs to prepare and the standard gas concentration size of preparing, system automatic start heating cabinet 11, after humidity reaches preset condition, open tee bend conversion valve 2, switch to nitrogen gas mouth 1, open first solenoid valve 13 and second solenoid valve 15 simultaneously, according to the concentration size of setting for, the system calculates the required proportion of diluent gas (nitrogen gas) and standard gas automatically, open first mass flowmeter 8 and second mass flowmeter 14, the velocity of flow of common diluent gas can be far higher than the velocity of flow of standard gas, consequently, the condition of standard gas backward flow can not exist. The gas is discharged from the vent 17 after being mixed, after being stabilized for a period of time, the valve of the suma tank is opened, part of the mixed gas enters the suma tank from the gas outlet 7, and the rest part of the mixed gas is continuously discharged from the vent 17.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (5)
1. A humidification device of VOCs gas is characterized in that: the device comprises a box body (6), and a sample introduction system, a gasification system, a gas distribution system and a control system which are arranged on the box body (6), wherein the sample introduction system comprises a nitrogen port (1), a three-way conversion valve (2), a water filling port (3), a first mass flow meter (8) and a stainless steel pipeline (9), the nitrogen port (1), the water filling port (3) and the stainless steel pipeline (9) are correspondingly communicated with three valve ports of the three-way conversion valve (2) respectively, and the first mass flow meter (8) is connected between the nitrogen port (1) and the corresponding valve port of the three-way conversion valve (2);
the gasification system comprises a stainless steel tank (10), a heating box (11), a temperature and humidity sensor (12), a stop valve (18) and a water outlet (19), wherein the stainless steel tank (10) is arranged in the heating box (11), the heating box (11) indirectly heats the stainless steel tank (10) by circularly heating air flow in a box body (6), the temperature heated by the heating box (11) and the humidity in the stainless steel tank (10) are monitored by the temperature and humidity sensor (12), the lower end of the stainless steel tank (10) is connected with the stop valve (18) and the water outlet (19), and the upper end of the stainless steel tank (10) is connected with a stainless steel pipeline (9);
the gas distribution system comprises a gas marking port (4), a gas outlet (7), a first electromagnetic valve (13), a second mass flowmeter (14), a second electromagnetic valve (15), a safety valve (16) and a gas outlet (17), wherein the gas marking port (4), the gas outlet (7) and the gas outlet (17) are correspondingly connected with the stainless steel tank (10) through three pipeline branches respectively, the first electromagnetic valve (13) and the second mass flowmeter (14) are connected to the pipeline branch of the gas marking port (4), and the second electromagnetic valve (15) and the safety valve (16) are connected to the pipeline branch of the gas outlet (17);
the control system comprises a controller and a control panel (5), the controller is connected with the control panel (5), and the three-way conversion valve (2), the first mass flow meter (8), the temperature and humidity sensor (12), the first electromagnetic valve (13), the second mass flow meter (14), the second electromagnetic valve (15) and the safety valve (16) are correspondingly connected with the controller.
2. A device for humidifying gases of VOCs as claimed in claim 1, wherein: the nitrogen port (1) is connected with a hydrocarbon removal trap.
3. A device for humidifying gases of VOCs as claimed in claim 1, wherein: the volume of the stainless steel tank (10) is within 500 mL.
4. A device for humidifying gases of VOCs as claimed in claim 1, wherein: the stainless steel tank (10) is made of 316 stainless steel, and the inner surface of the stainless steel tank is subjected to electro-polishing and passivation treatment.
5. A device for humidifying gases of VOCs as claimed in claim 1, wherein: the discharge pressure of the relief valve (16) is 50 psia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613569.XU CN210719905U (en) | 2019-09-26 | 2019-09-26 | Humidifying device for VOCs gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613569.XU CN210719905U (en) | 2019-09-26 | 2019-09-26 | Humidifying device for VOCs gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210719905U true CN210719905U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921613569.XU Active CN210719905U (en) | 2019-09-26 | 2019-09-26 | Humidifying device for VOCs gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210719905U (en) |
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2019
- 2019-09-26 CN CN201921613569.XU patent/CN210719905U/en active Active
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Effective date of registration: 20211008 Address after: No.219, ningliu Road, Jiangbei new district, Nanjing, Jiangsu Province, 210000 Patentee after: Nanjing Zhongke Huaxing emergency Technology Research Institute Co.,Ltd. Address before: 210044 No. 219 Ning six road, Jiangbei new district, Nanjing, Jiangsu Patentee before: NANJING University OF INFORMATION SCIENCE & TECHNOLOGY |
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