CN206348273U - A kind of equipment for detecting air formaldehyde concentration - Google Patents
A kind of equipment for detecting air formaldehyde concentration Download PDFInfo
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- CN206348273U CN206348273U CN201621487067.3U CN201621487067U CN206348273U CN 206348273 U CN206348273 U CN 206348273U CN 201621487067 U CN201621487067 U CN 201621487067U CN 206348273 U CN206348273 U CN 206348273U
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- formaldehyde
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Abstract
The utility model discloses a kind of equipment for detecting air formaldehyde concentration, including gas sample module, formaldehyde absorption module and detection module；Sampling module containing formaldehyde gas circulates gas sample under blower fan drive in whole equipment, and using formaldehyde absorption module the formaldehyde in air can fully absorbed by formaldehyde absorbent；The cyclic absorption of gas sample in a device ensure that fully absorbing for formaldehyde gas, gas sample and absorbing liquid are fully contacted in the absorbed layer of formaldehyde absorption module, improve the absorption efficiency of the formaldehyde in air, then gas-liquid mixture is kept completely separate in gas-liquid separator and except mist entrainment device, gas sample returns to gas sample storage tank and carries out circulate operation, the real-time of formaldehyde gas absorption efficiency and formalin is greatly improved, detection sensitivity is improved；In detection module, in lucifuge housing with developer chromogenic reaction occurs for formaldehyde absorbent, is used to detect developing concentration in the housing provided with spectrophotometer, improves detection stability and accuracy.
Description
Technical field
The utility model is related to a kind of gas detection equipment, and in particular to a kind of to be used to detect setting for air formaldehyde concentration
It is standby.
Background technology
Country's issuing and implementation in 2006《Code for indoor environmental pollution control of civil building engineering》List five kinds of main dirts
Contaminate thing：Formaldehyde, benzene, ammonia, TOVC TVOC, radioactive radon etc..Formaldehyde is a kind of colourless gas, there is special
Penetrating odor, the main harm of formaldehyde is shown as to mucocutaneous stimulation, when formaldehyde reaches finite concentration indoors,
People just has sense of discomfort, the concentration of formaldehyde more than 0.08 mg/m3 can cause furious, eye to be itched, throat discomfort or pain, hoarseness,
Sneeze, uncomfortable in chest, asthma, dermatitis etc..Newly-decorated room content of formaldehyde is higher, is the main inducing of numerous diseases.It is long-term containing
Have in the environment of formaldehyde and live, great harm can be produced to human body, therefore the accurate measurement of concentration of formaldehyde has important meaning
Justice.
The measuring method of formaldehyde gas of the prior art mainly has AAS, electrochemical process and chromatography etc., point
The great advantage that light photometry is determined is easy to operate, performance is stable, error is small, but sensitivity is low, absorbing liquid easily develops the color
Not exclusively.Electrochemical sensor method fast response time, but it is larger to be interfered, quantitative error information detection is larger.Formaldehyde is surveyed
Simple to operate, easy to use, the suitable personal and family detection formaldehyde of examination box, but the accuracy and reactant of its testing result,
The many factors such as whether developer is stablized, reaction time, whether packaging is tight, whether operation is correct have relation.
The content of the invention
In view of the above-mentioned problems, the purpose of this utility model, which is to provide a kind of being used for based on chemical absorbing principle, detects air
The equipment of middle concentration of formaldehyde, realizes the purpose of the sensitivity for improving formaldehyde testing equipment, accuracy of detection and response speed.
To achieve the above object, the utility model takes following technical scheme：
A kind of equipment for detecting air formaldehyde concentration, including gas sample module, formaldehyde absorption module and detection
Module；The gas sample module includes blower fan and gas sample storage tank, and the formaldehyde absorption module includes U-shaped liquid storage pipe and formaldehyde
Absorptive unit, the formaldehyde absorption unit includes packing material absorbing layer, gas-liquid separator from the bottom to top, and the detection module includes keeping away
Bare hull body, developer reservoir and spectrophotometer；Described blower fan one end is connected with gas sample storage tank, and the gas sample storage tank is provided with gas
Body sample introduction valve, the gas sample storage tank is connected with the gas-liquid separator in formaldehyde absorption unit again, and the blower fan other end is connected with U
Type liquid storage pipe, the U-shaped liquid storage pipe is connected with the packing material absorbing layer in formaldehyde absorption unit again, ' U ' bottom of the U-shaped liquid storage pipe
Provided with the effuser with sampling valve, the effuser is inserted directly into lucifuge housing, and it is straight to be additionally provided with flow export in the lucifuge housing
Connect and flow into the spectrophotometer of bottom side, the lucifuge housing upper side is additionally provided with developer reservoir, developer storage
Developer in liquid device is entered in lucifuge housing by flowing into pipe, and the lucifuge housing bottom is provided with discharging tube, and the outflow
The liquid that pipe is provided with draining valve, lucifuge housing is flowed directly into waste liquid tank in the state of draining valve opening.
Further, the gas-liquid separator top is additionally provided with entrainment device, the entrainment device directly with U-shaped liquid storage
Pipe is connected.
Further, the entrainment device upper pipe is additionally provided with purge valve.
Further, the packing material absorbing layer loads conventional structured packing or random packing.
Further, the conventional structured packing includes fiber ripple packing etc., and monoblock is piled up in Reaction Separation module,
Filler is after surface treatment, with good wetability；The random packing is by 5mm glass fiber ring group into each filler list
There is irregular duct in first, promote to mix between fluid.
Further, the formaldehyde absorbent deposits in formaldehyde absorption module, and it is 3- methyl -2-[4-morpholinodithio quinoline ketone
The aqueous solution of hydrazone hydrochloride hydrate, concentration is 0.1~0.5wt%.
Further, the developer composition is ammonium ferric sulfate solution, and concentration is 0.1~2wt%.
It is preferred that, the gas sample storage tank（11）Volume is 25L, and the sampling process is 10~20 minutes；The gas
Sample cyclic absorption 20~60 minutes in a device；The developer consumption is 0.1~0.5ml；Formaldehyde absorbent consumption is 40
~80ml.
The course of work of above-mentioned detection device is：The detection module of the equipment is cleaned first, purge valve is opened and takes
Sample valve, and cleaning fluid are poured into by purge valve, and absorption module and detection module are cleaned, then open draining valve, cleaning fluid
Flow into detector waste liquid tank；Sampling valve and draining valve are then shut off, formaldehyde absorbent, formaldehyde absorbent are added by purge valve
Enter in U-shaped liquid storage pipe, purge valve is turned off afterwards；The air in blower fan and gas sampling valve door, environment is opened again in wind
Gas sample storage tank is entered in the presence of machine, after whole gas sample storage tank, gas sampling valve is closed, in advertising for blower fan
Under effect, the gas sample in gas sample storage tank is circulated in detection device, and the formaldehyde absorbent in U-shaped liquid storage pipe is made in blast
With lower entrance formaldehyde absorption module, packing material absorbing layer of the gas sample with formaldehyde absorbent in formaldehyde absorption module is fully contacted,
Fully absorb the formaldehyde absorbed liquid in air, then gas-liquid mixture from bottom to top divides under the drive of blower fan by gas-liquid
From device and except mist entrainment device so that gas-liquid is kept completely separate, gas sample returns to gas sample storage tank, then carries out circulate operation,
After the completion of cyclic absorption operation, sampling valve is opened, formaldehyde absorbent is flowed into lucifuge housing, formaldehyde absorbent is in lucifuge housing
In occur chromogenic reaction with developer, developing concentration is detected by spectrophotometer after the completion of chromogenic reaction, beaten after the completion of detection
The fluid valve that begins to rehearse discharge waste liquid enters in waste liquid tank.
The utility model is based on the chemical reaction colour developing principle between formalin and phenol reagent and developer, with high
Detection sensitivity and selectivity.Sampling module containing formaldehyde gas follows gas sample under blower fan drive in whole equipment
Ring, using formaldehyde absorption module the formaldehyde in air can fully absorbed by formaldehyde absorbent；Gas sample is in a device
Cyclic absorption ensure that fully absorbing for formaldehyde gas, and gas sample and absorbing liquid are abundant in the absorbed layer of formaldehyde absorption module
Contact, improves the absorption efficiency of the formaldehyde in air, then gas-liquid mixture is complete in gas-liquid separator and except mist entrainment device
Fully separating, gas sample returns to gas sample storage tank and carries out circulate operation, greatly improves formaldehyde gas absorption efficiency molten with formaldehyde
The real-time of liquid, improves detection sensitivity；In detection module, formaldehyde absorbent in specific lucifuge housing with developer
Generation chromogenic reaction, is used to detect developing concentration in the housing provided with spectrophotometer, improves detection stability and accuracy.
Brief description of the drawings
Fig. 1 is whole interior structural representation of the present utility model.
Fig. 2 is the structural representation of conventional structured packing in the utility model.
Fig. 3 is random packing cellular construction schematic diagram in the utility model.
Wherein, 1- waste liquid tanks, 2- draining valves, 3- lucifuge housings, 4- sampling valves, 5-U type liquid storage pipes, 6- packing material absorbings
Layer, 7- gas-liquid separators, 8- removes mist entrainment device, 9- cleaning fluid valves, 10- gas sampling valves, 11- gas sample storage tanks, 12-
Blower fan, 13- developer reservoirs, 14- spectrophotometers.
Embodiment
In order that the purpose, technical scheme and advantage that the utility model is implemented are clearer, it is new below in conjunction with this practicality
The accompanying drawing of type, the technical scheme to the utility model specific embodiment is clearly and completely described.
As shown in figure 1, the present embodiment includes gas sample module, formaldehyde absorption module and detection module；The gas takes
Egf block includes blower fan 12 and gas sample storage tank 11, and the formaldehyde absorption module includes U-shaped liquid storage pipe 5 and formaldehyde absorption unit,
The formaldehyde absorption unit from the bottom to top include packing material absorbing layer 6, gas-liquid separator 7, the detection module include lucifuge housing 3,
Developer reservoir 13 and spectrophotometer 14；Described one end of blower fan 12 is connected with gas sample storage tank 11, and the gas sample storage tank 11 is set
There is gas sampling valve 10, the gas sample storage tank 11 is connected with the gas-liquid separator 7 in formaldehyde absorption unit, the blower fan 12 again
The other end is connected with U-shaped liquid storage pipe 5, and the U-shaped liquid storage pipe 5 is connected with the packing material absorbing layer 6 in formaldehyde absorption unit again, described U-shaped
' U ' bottom of liquid storage pipe 5 is provided with the effuser with sampling valve 4, and the effuser is inserted directly into lucifuge housing 3, the lucifuge shell
It is additionally provided with flow export in body 3 to flow directly into the spectrophotometer 14 of bottom side, the top side of lucifuge housing 3 is additionally provided with aobvious
Developer in toner reservoir 13, the developer reservoir 13 is entered in lucifuge housing 3 by flowing into pipe, the lucifuge shell
The bottom of body 3 is provided with discharging tube, and the liquid that the effuser is provided with draining valve 2, lucifuge housing 3 is opened in draining valve 2
In the state of flow directly into waste liquid tank 1.
Further, the top of gas-liquid separator 7 is additionally provided with entrainment device 8, the entrainment device 8 directly with it is U-shaped
Liquid storage pipe 5 is connected；The upper pipe of entrainment device 8 is additionally provided with purge valve.
As shown in Figures 2 and 3, the packing material absorbing layer 6 loads conventional structured packing or random packing；The routine is regular to fill out
Expect for fiber ripple packing, monoblock is piled up in Reaction Separation module, and filler is after surface treatment, with good wetting
Property；There is irregular duct in the glass fiber random packing, each filler unit, promote to mix between fluid.
The design parameter that the present embodiment is used for general indoor environment formaldehyde measurement is as follows：
（1）The gas sample storage tank volume is 25L, and provided with gas sampling mouthful, injection port can be whole by valve switch control
Individual sampling process is 10~20 minutes.
（2）The formaldehyde absorbent is the aqueous solution of 3- methyl-2-benzothiazolinone hydrazone hydrochloride hydrates, content
For 0.1~0.5%, formaldehyde absorbent consumption is 40~80ml.
（3）Developer composition in the detection module is ammonium ferric sulfate solution, and content is 0.1~2%, developer consumption
For 0.1~0.5ml.
（4）The detection device length is 800 mm, and width is 800 mm, is highly 300 mm；Reaction formaldehyde absorption module
Interior absorbed layer packed height 100mm.
（5）Gas sample cyclic absorption 20~60 minutes in a device.
Concentration of formaldehyde scaling method of the present utility model, specific steps include：
Step 1：Compound concentration is respectively 0.1mg/L, and 0.2 mg/L, 0.3 mg/L, 0.4 mg/L formaldehyde standard is molten
Liquid；
Step 2：Developer is added into standard liquid, after the completion for the treatment of chromogenic reaction, using spectrophotometer detect this four
The concentration registration of group solution, concrete numerical value is listed in table 1；
Step 3：The display numerical value of spectrophotometer is demarcated according to the actual concentrations of standard liquid.
The concentration of standard solution of table 1 and spectrophotometer registration
The detection method of formaldehyde, specific steps include：
Step 1：Cleaning fluid valves 9 and sampling valve 4 are opened, cleaning fluid is added to absorption module and detection from wash-out valve 9
Module is cleaned, and sampling valve 4 is closed after the completion of cleaning, and formaldehyde absorbent is added from purge valve 9；
Step 2：Blower fan 12 is opened, air is by the effect of blower fan 12 in gas sample module, by gas sample storage device side
The intake valve 10 in face enters gas sample storage tank 11, makes to be full of room in gas sample storage device by the blower fan swabbing action of 10~20 minutes
Interior air, is accordingly turned off gas sampling valve；
Step 3：Close after gas sampling valve 10, gas sample is circulated in the case where blower fan 12 advertises effect in detection device, U
Formaldehyde absorbent in type liquid storage pipe 5 enters formaldehyde absorption module under Action of Wind pressure, and gas sample and absorbing liquid are inhaled in formaldehyde
Fully contacted in the absorbed layer 6 for receiving module, fully absorb the formaldehyde absorbed liquid in air, then gas-liquid mixture is in gas-liquid
Separator 7 and except being kept completely separate in mist entrainment device 8, gas sample returns to gas sample storage tank 11, then carries out circulate operation, gas
Body sample cyclic absorption 20~60 minutes in a device；
Step 4：After the completion of cyclic absorption operation, sampling valve 4 is opened, formaldehyde absorbent is flowed into lucifuge housing 3, formaldehyde
Chromogenic reaction occurs in lucifuge housing 3 with developer for absorbing liquid, and the chromogenic reaction time is 5 minutes, is led to after the completion of chromogenic reaction
The detection developing concentration of spectrophotometer 14 is crossed, the discharge waste liquid of draining valve 2 is opened after the completion of detection and enters waste liquid tank.
Calibration method of the present utility model, specific steps include：
Step 1：Prepare 2mg/L formaldehyde standard liquid；
Step 2：Being calculated respectively by concentration gradient needs the amount of formalin in 25L barrels；
Step 3：Formalin is squeezed into microsyringe according to the amount of calculating in 25L barrels, and uses vavuum pump circulation barrel
In gas 15min formalin is volatilized in a device completely；
Step 4：Absorber is connected according to the concentration of formaldehyde in gas in detection method cyclic absorption detection bucket by 25L barrels,
Specific detection numerical value is listed in table 2.
The calibration figure of the present utility model of table 2 is contrasted
The utility model and the comparing result of other detection methods：
In 10m3Closed Laboratory Module in, be separately added into formalin by concentration gradient, blower fan opened in Laboratory Module, this
When formalin volatilize rapidly, come after after complete volatilization, the step of according to the utility model detection method in determination experiment cabin
Concentration of formaldehyde, while being compared using the different formaldehyde registration detector of the other three, wherein detector 1 and 2 is to be based on
The method of electric signal sensor, detector 3 is the method based on chemical absorbing, and specific testing result is listed in table 3.
The utility model testing result of table 3 and other detector Comparative results
It can be obtained by above-mentioned testing result, compared to other detectors, formaldehyde examination result of the present utility model is more stable
With it is accurate.
Claims (6)
1. a kind of equipment for detecting air formaldehyde concentration, it is characterised in that the equipment includes gas sample module, formaldehyde
Absorption module and detection module；The gas sample module includes blower fan（12）With gas sample storage tank（11）, the formaldehyde absorption
Module includes U-shaped liquid storage pipe（5）With formaldehyde absorption unit, the formaldehyde absorption unit includes packing material absorbing layer from the bottom to top（6）, gas
Liquid/gas separator（7）, the detection module include lucifuge housing（3）, developer reservoir（13）And spectrophotometer（14）；It is described
Blower fan（12）One end is connected with gas sample storage tank（11）, the gas sample storage tank（11）Provided with gas sampling valve（10）, the gas
Sample storage tank（11）The gas-liquid separator in formaldehyde absorption unit is connected with again（7）, the blower fan（12）The other end is connected with U-shaped liquid storage pipe
（5）, the U-shaped liquid storage pipe（5）Again with the packing material absorbing layer in formaldehyde absorption unit（6）It is connected, the U-shaped liquid storage pipe（5）' U '
Bottom, which is provided with, carries sampling valve（4）Effuser, the effuser is inserted directly into lucifuge housing（3）In, the lucifuge housing（3）In also
The spectrophotometer of bottom side is flowed directly into provided with flow export（14）In, the lucifuge housing（3）Top side is additionally provided with colour developing
Agent reservoir（13）, the developer reservoir（13）In developer enter to lucifuge housing by flowing into pipe（3）It is interior, it is described to keep away
Bare hull body（3）Bottom is provided with discharging tube, and the effuser is provided with draining valve（2）, lucifuge housing（3）Interior liquid is in discharge opeing
Valve（2）Waste liquid tank is flowed directly into the state of opening（1）In.
2. equipment as claimed in claim 1, it is characterised in that the gas-liquid separator（7）Top is additionally provided with entrainment device
（8）, the entrainment device（8）Directly with U-shaped liquid storage pipe（5）It is connected.
3. equipment as claimed in claim 2, it is characterised in that the entrainment device（8）Upper pipe is additionally provided with purge valve.
4. equipment as claimed in claim 1, it is characterised in that the packing material absorbing layer（6）Load conventional structured packing or dissipate
Heap filler.
5. equipment as claimed in claim 4, it is characterised in that the conventional structured packing is fiber ripple packing, monoblock heap
Build in Reaction Separation module, filler is after surface treatment, with good wetability.
6. have in equipment as claimed in claim 4, it is characterised in that the random packing, each filler unit irregular
Duct, promotes to mix between fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621487067.3U CN206348273U (en) | 2016-12-31 | 2016-12-31 | A kind of equipment for detecting air formaldehyde concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621487067.3U CN206348273U (en) | 2016-12-31 | 2016-12-31 | A kind of equipment for detecting air formaldehyde concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206348273U true CN206348273U (en) | 2017-07-21 |
Family
ID=59319547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621487067.3U Expired - Fee Related CN206348273U (en) | 2016-12-31 | 2016-12-31 | A kind of equipment for detecting air formaldehyde concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206348273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738428A (en) * | 2019-02-28 | 2019-05-10 | 赵云红 | A kind of the colour developing titration detection device and its detection method of formaldehyde in air content |
| CN113447476A (en) * | 2021-06-29 | 2021-09-28 | 苏州中正工程检测有限公司 | Quick check out test set of formaldehyde that indoor environment was used |
-
2016
- 2016-12-31 CN CN201621487067.3U patent/CN206348273U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738428A (en) * | 2019-02-28 | 2019-05-10 | 赵云红 | A kind of the colour developing titration detection device and its detection method of formaldehyde in air content |
| CN109738428B (en) * | 2019-02-28 | 2021-08-10 | 杭州艾克瑞尔检测科技有限公司 | Chromogenic titration detection device and detection method for formaldehyde content in air |
| CN113447476A (en) * | 2021-06-29 | 2021-09-28 | 苏州中正工程检测有限公司 | Quick check out test set of formaldehyde that indoor environment was used |
| CN113447476B (en) * | 2021-06-29 | 2022-08-02 | 苏州中正工程检测有限公司 | Quick check out test set of formaldehyde that indoor environment was used |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170721 Termination date: 20181231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |