CN106644667A - System and method for detecting content of formaldehyde in air - Google Patents
System and method for detecting content of formaldehyde in air Download PDFInfo
- Publication number
- CN106644667A CN106644667A CN201710100866.3A CN201710100866A CN106644667A CN 106644667 A CN106644667 A CN 106644667A CN 201710100866 A CN201710100866 A CN 201710100866A CN 106644667 A CN106644667 A CN 106644667A
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- Prior art keywords
- formaldehyde
- air
- temperature control
- watering apparatus
- dried
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
Abstract
The invention relates to a system and a method for detecting the content of formaldehyde in air. The system comprises a temperature control water removal device and a formaldehyde detection device, wherein the temperature control water removal device is internally provided with a water absorption material and a temperature controller, and is provided with an air inlet and a dry air outlet; the formaldehyde detection device is provided with a dry air inlet; the dry air inlet is connected with the dry air outlet of the temperature control water removal device. The method comprises the following steps: conveying air which contains formaldehyde into the temperature control water removal device; starting the temperature controller to control temperature rising of the temperature control water removal device; after the water absorption material absorbs water in the air which contains the formaldehyde and the temperature is raised, obtaining dry air; conveying the dry air into the formaldehyde detection device; detecting the content of the formaldehyde in the air. The system and the method, provided by the invention, can be used for rapidly and directly detecting the content of the formaldehyde in the air, and can be used for effectively removing influences on the water in the air; rapid and effective assessment on a formaldehyde pollution condition in the air is realized; the system and the method are convenient and accurate to operate and are low in cost.
Description
Technical field
The present invention relates to a kind of system and method that can directly, fast and accurately detect formaldehyde in air content.
Background technology
Formaldehyde is a kind of plasm poisonous substance, is one of major pollutants in air, by the World Health Organization (WHO)
It is defined as potential danger carcinogenic substance and important environmental contaminants with Environmental Protection Agency USA (EPA).In recent years, have always compared with
Many reports with regard to formaldehyde.Formaldehyde has harm that is carcinogenic, promoting cancer, especially for the relatively low old man of immunity, child, pregnant
Woman, its harm is bigger.Investigation shows that long-term excessive inhaled formaldehyde can cause various serious diseases such as nasopharyngeal carcinoma, throat cancer.First
Aldehyde is to the harm of human body mainly by allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver, immunologic dysfunction etc.
Aspect is showing.
When the aerial content of formaldehyde reaches 0.06～0.1mg/m3When, can make one to feel peculiar smell and discomfort；Work as content
Reach 0.5～0.6mg/m3When, the symptom for eyes stung, throat discomfort or pain occur can be made one；When content reaches 30mg/m3
When, understand causing death immediately.
The harm of formaldehyde is so big, how fast and accurately to detect its content, so as to effectively removing or reducing in air
The content of formaldehyde is just particularly important.It is because formaldehyde is highly soluble in water and volatile, if thinking directly to determine formaldehyde in air
, there is larger difficulty in content.Also, in the detection process of formaldehyde, due to the impact of moisture in air, cause content of formaldehyde
Final detection result there is larger deviation.
At present, in the analysis context of detection of content of formaldehyde substantial amounts of research has been done both at home and abroad, has also been established many feasible
Analysis Methods for Formaldehyde.At present, common method includes：Acetylacetone,2,4-pentanedione AAS, chromatography, electrochemical process, chemical titration.
Additionally, also generating various methods such as phloroglucinol method, the chromatography of ions, infra-red sepectrometry, thin-layered chromatography successively.These inspections
Although survey method can realize the detection to formaldehyde in air, detection process is very loaded down with trivial details.For example, acetylacetone,2,4-pentanedione light splitting light
Degree method is related to chromogenic reaction, and periodic calibrating is carried out to standard liquid, and can only detect the formaldehyde in water phase, and operation is very not
It is convenient.Meanwhile, the detection method such as chromatography, infra-red sepectrometry is required for carrying out the pre-treatment of series of complex before testing
Process, it is impossible to realize the direct detection of formaldehyde in air, and easily affected by moisture in air.The spirit of above-mentioned each detection method
Sensitivity and the degree of accuracy are also not quite similar, and needs consider according to the actual conditions of different monitoring points.
Prior art one discloses a kind of assay method of gaseous formaldehyde in polyformaldehyde.The method needs to receive gaseous formaldehyde
In collecting water phase, formalin is formed, and need PARA FORMALDEHYDE PRILLS(91,95) solution to be demarcated, just can be quantitative determined.The side of the present invention
Method, process is cumbersome, it is impossible to realizes that the direct quantitative to formaldehyde in air content is determined, can not exclude the impact of moisture.
Prior art two discloses a kind of formaldehyde examination and removal device.The technology is that formaldehyde is qualitatively decomposed into CO2
And H2O, it is impossible to fully achieve quantitative determination, can not eliminate the impact of moisture.
The content of the invention
The present invention is intended to provide a kind of system and method for determining formaldehyde in air content, not only can eliminate water in air
The impact for dividing, can also realize the direct injected detection of formaldehyde, it is not necessary to some complicated pretreatment process, and need not carry out
The chromogenic reaction of early stage, it is easy to operate, and fast.
The invention provides it is a kind of detection formaldehyde in air content system, the system include temperature control de-watering apparatus, first
Aldehyde detection means.
Absorbent material and temperature controller are provided with the temperature control de-watering apparatus；There is the temperature control de-watering apparatus air to enter
Mouthful, be dried gas outlet.
The formaldehyde examination device have be dried gas entrance, the drying for being dried gas entrance and the temperature control de-watering apparatus
Gas outlet connection.
Further, said system also includes inlet duct, and in the inlet duct filter is provided with.The air inlet dress
Put with air intlet, filter air outlet slit, the filtration air outlet slit is connected with the air intake of the temperature control de-watering apparatus.
Further, said system also includes air extractor, the air extractor and the inlet duct and the temperature control
De-watering apparatus connect, and the filtered air for the inlet duct to be discharged is sent into the temperature control de-watering apparatus.
Further, said system also includes formaldehyde enriching apparatus, and the formaldehyde enriching apparatus are filled with the temperature control eliminating water
Put and formaldehyde examination device connection.
Preferably, said system also includes magnetic valve,
The air extractor is connected with the temperature control de-watering apparatus by the magnetic valve.
The temperature control de-watering apparatus are connected with the formaldehyde enriching apparatus by the magnetic valve.
The formaldehyde enriching apparatus are connected with the formaldehyde examination device by the magnetic valve.
Present invention also offers a kind of method that utilization said system detects formaldehyde in air content, including step：
Air containing formaldehyde is sent into the temperature control de-watering apparatus, and starts the temperature controller, the temperature control eliminating water
The temperature of device is raised, and after the air containing formaldehyde absorbent material described in absorbs moisture and intensification, obtains being dried gas.
The content that pneumatic transmission enters to be detected in the formaldehyde examination device formaldehyde is dried by described.
Preferably, the absorbent material is from Sodium Polyacrylate and the copolymer of sodium alginate.
In the method for above-mentioned detection formaldehyde in air content, the temperature for controlling the temperature control de-watering apparatus is increased to 25～50
℃。
Further, said method also includes step：
Air containing formaldehyde is sent into the inlet duct and is filtered, obtain filtered air, be then fed into institute
In stating temperature control de-watering apparatus.
The pneumatic transmission that is dried is entered in the formaldehyde enriching apparatus, until content of formaldehyde reaches the formaldehyde examination device
During detection limit, in sending into the formaldehyde examination device.
Preferably, when the volume that the volume for being dried gas reaches the temperature control de-watering apparatus is limited, the magnetic valve
Open, the gas that is dried is entered into the formaldehyde enriching apparatus.It is described when the formaldehyde enriching apparatus reach volume to be limited
Magnetic valve is opened, and the gas that is dried is entered into the formaldehyde examination device.
Compared with prior art, it is of the invention in the content of formaldehyde in determining air contained water, without the need for complicated pre-treatment
Journey.Also, by arranging temperature control de-watering apparatus, the moisture in air can be effectively removed, and make formaldehyde completely in volatileness, be kept away
The impact of moisture PARA FORMALDEHYDE PRILLS(91,95) assay is exempted from, so as to ensure that the accuracy of testing result.
The system and method for the present invention are capable of achieving quick, the direct detection of formaldehyde in air content, and can effectively remove
The impact of moisture in air, is capable of achieving the fast and effectively evaluation to formaldehyde in air pollution condition.Easy to operate, standard of the invention
Really, it is and with low cost.
Description of the drawings
Fig. 1 is for detecting the system schematic of formaldehyde in air content in the embodiment of the present invention.
Fig. 2 is method flow schematic diagram of the embodiment of the present invention using the system detectio formaldehyde in air content shown in Fig. 1.
Reference in accompanying drawing is as follows：
1st, inlet duct；
2nd, air extractor；
3rd, temperature control de-watering apparatus；
4th, formaldehyde enriching apparatus；
5th, formaldehyde examination device；
601st, magnetic valve, 602, magnetic valve, 603, magnetic valve.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
As shown in figure 1, the system for being used to detect formaldehyde in air content for the embodiment of the present invention, including temperature control de-watering apparatus
3 and formaldehyde examination device 5.In other embodiments of the invention, also including inlet duct 1.In different embodiments, also include
Air extractor 2.In other embodiments, formaldehyde enriching apparatus 4 are further included.In the preferred embodiments of the present invention, one can be entered
Step includes magnetic valve 601, magnetic valve 602, magnetic valve 603.
In the present invention, inlet duct 1, air extractor 2, temperature control de-watering apparatus 3, formaldehyde enriching apparatus 4, formaldehyde examination device
5 are sequentially connected.Wherein, magnetic valve 601 is provided between air extractor 2 and temperature control de-watering apparatus 3.Temperature control de-watering apparatus 3 and first
Magnetic valve 602 is provided between aldehyde enriching apparatus 4.Magnetic valve is provided between formaldehyde enriching apparatus 4 and formaldehyde examination device 5
603.Magnetic valve is capable of achieving gas and automatically controls conveying between attachment means.
Filter is provided with inlet duct 1, when impurity is more in air to be measured, can be filtered to remove thin in air
Small particle.Inlet duct 1 has air intlet, filters air outlet slit.
Temperature control de-watering apparatus 3 are used to receive the filtered air sent into by inlet duct 1, be provided with absorbent material and
Temperature controller.Wherein, absorbent material is used to absorb the moisture removed in filtered air.Meanwhile, temperature controller is removed for regulating and controlling temperature control
The temperature of water installations 3, makes formaldehyde in volatilization state.Temperature control de-watering apparatus 3 have air intake, are dried gas outlet.Wherein, air enters
Mouth is connected with the filtration air outlet slit of inlet duct 1.
Air extractor 2 is arranged between inlet duct 1 and temperature control de-watering apparatus 3, with inlet duct 1 and temperature control de-watering apparatus
3 connections.Air extractor 2 can send into the air after filtering that inlet duct 1 is discharged in temperature control de-watering apparatus 3.
Formaldehyde examination device 5 is used to receive and is dried gas by what temperature control de-watering apparatus 3 were sent into, so as to detect containing for wherein formaldehyde
Amount, that is, detect the content of formaldehyde in air.Formaldehyde examination device 5 have be dried gas entrance.Wherein, it is dried gas entrance to remove with temperature control
The gas outlet that is dried of water installations 3 connects.In the present invention, formaldehyde examination device 5 is high sensitivity, high-resolution formaldehyde examination sets
It is standby.In the embodiment having, formaldehyde examination device 5 can select mass spectrograph.
Formaldehyde enriching apparatus 4 are used for storage and are dried gas by what temperature control de-watering apparatus 3 were sent into so that be dried containing for formaldehyde in gas
Amount can reach the detection limit of formaldehyde examination device 5.Formaldehyde enriching apparatus 4 connect with temperature control de-watering apparatus 3 and formaldehyde examination device 5
Connect.
In a preferred embodiment of the invention, connected by magnetic valve 601 between air extractor 2 and temperature control de-watering apparatus 3.
Connected by magnetic valve 602 between temperature control de-watering apparatus 3 and formaldehyde enriching apparatus 4.Formaldehyde enriching apparatus 4 and formaldehyde examination device
Connected by magnetic valve 603 between 5.
As shown in Fig. 2 to be shown using the flow process of the system detectio formaldehyde in air content shown in Fig. 1 in the embodiment of the present invention
It is intended to.The method is realized by following process：
Air containing formaldehyde is sent into temperature control de-watering apparatus 3.In different embodiments of the invention, for containing compared with
Polymictic air containing formaldehyde, first sends into the air containing formaldehyde in inlet duct 1, in the presence of filter, filters
The tiny particles content in air is removed, filtered air is obtained.In the embodiment having, after be able to filtering via air extractor 2
Air is sent into temperature control de-watering apparatus 3.As the preferred embodiments of the present invention, gas after filtration can be controlled by magnetic valve 601
Into in temperature control de-watering apparatus 3.
The absorbent material arranged in temperature control de-watering apparatus 3, can effectively absorb the moisture removed in air to be measured.Start temperature
Control device, the temperature in temperature control de-watering apparatus 3 is raised.Because formaldehyde is highly soluble in water, and start volatilization when temperature is higher than 19 DEG C.
Therefore, in the present invention, the temperature that temperature controller is controlled in temperature control de-watering apparatus 3 is 25～50 DEG C, can cause the first in air to be measured
Aldehyde all with the presence of gaseous volatilization state, realizes being kept completely separate for formaldehyde and moisture, so as to ensure the accuracy of testing result.
The step can obtain being dried gas containing volatilization state formaldehyde.
Absorbent material in the present invention is and the insensitive high score of PARA FORMALDEHYDE PRILLS(91,95) with compared with strong absorptive energy and water retention property
Sub- polymeric material, moisture that can be effectively in absorption air, and will not react with formaldehyde, including super absorbent resin class.This
In invention, absorbent material can select Sodium Polyacrylate or sodium alginate etc..Preferably, absorbent material of the invention selects polypropylene
The copolymer of sour sodium and sodium alginate.
Pneumatic transmission will be dried to enter in formaldehyde examination device 5, the content of formaldehyde, the i.e. content of formaldehyde in air is detected.
In different embodiments of the invention, relatively low for formaldehyde in air content or formaldehyde examination device 5 detection limit
When higher, pneumatic transmission need to will be dried first and enters in formaldehyde enriching apparatus 4 to store.Until in formaldehyde enriching apparatus 4, being dried formaldehyde in gas
Content when reaching the detection limit of formaldehyde examination device 5, be re-fed into formaldehyde examination device 5 carrying out the measure of content of formaldehyde.
The formaldehyde examination device 5 of the present invention can select mass spectrograph etc. with high sensitivity, high-resolution testing equipment.This
Invention is not intended to limit the selection of formaldehyde examination device, can be selected according to the detection demand of different embodiments.
In a preferred embodiment of the invention, gas can be automatically controlled in different device by magnetic valve 601,602,603
Between conveying.When the volume that the gas volume in temperature control de-watering apparatus 3 reaches the device is limited, electromagnetism can be automatically touched
Valve 602 is opened so that the gas that is dried in temperature control de-watering apparatus 3 is delivered in formaldehyde enriching apparatus 4.In the same manner, when formaldehyde enrichment is filled
When putting the gas volume in 4 and reaching its volume and limit, can automatically touch magnetic valve 603 and open so that be dried gas and be delivered to first
In aldehyde detection means 5.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and and
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. it is a kind of detection formaldehyde in air content system, it is characterised in that the system include temperature control de-watering apparatus, formaldehyde examine
Survey device；
Absorbent material and temperature controller are provided with the temperature control de-watering apparatus；The temperature control de-watering apparatus have air intake, do
Pathogenic dryness is exported；
With gas entrance is dried, the gas entrance that is dried goes out the formaldehyde examination device with the gas that is dried of the temperature control de-watering apparatus
Mouth connection.
2. system according to claim 1, it is characterised in that also including inlet duct, be provided with the inlet duct
Filter；The inlet duct has air intlet, filters air outlet slit, and the filtration air outlet slit is filled with the temperature control eliminating water
The air intake connection put.
3. system according to claim 2, it is characterised in that also including air extractor, the air extractor with it is described enter
Device of air and the temperature control de-watering apparatus connect, and the filtered air for the inlet duct to be discharged is sent into the temperature control and removed
In water installations.
4. system according to claim 3, it is characterised in that also including formaldehyde enriching apparatus, the formaldehyde enriching apparatus
It is connected with the temperature control de-watering apparatus and the formaldehyde examination device.
5. system according to claim 4, it is characterised in that also including magnetic valve,
The air extractor is connected with the temperature control de-watering apparatus by the magnetic valve；
The temperature control de-watering apparatus are connected with the formaldehyde enriching apparatus by the magnetic valve；
The formaldehyde enriching apparatus are connected with the formaldehyde examination device by the magnetic valve.
6. a kind of method of the arbitrary described system detectio formaldehyde in air content of utilization claim 1-5, it is characterised in that bag
Include step：
Air containing formaldehyde is sent into the temperature control de-watering apparatus, and starts the temperature controller, the temperature control de-watering apparatus
Temperature raise, the air containing formaldehyde described in absorbent material absorb moisture and intensification after, obtain being dried gas；
The content that pneumatic transmission enters to be detected in the formaldehyde examination device formaldehyde is dried by described.
7. method according to claim 6, it is characterised in that the absorbent material is from Sodium Polyacrylate and sodium alginate
Copolymer.
8. method according to claim 6, it is characterised in that the temperature of the control temperature control de-watering apparatus is increased to 25～
50℃。
9. method according to claim 6, it is characterised in that also including step：
Air containing formaldehyde is sent into the inlet duct and is filtered, obtain filtered air, be then fed into the control
In warm de-watering apparatus；
The pneumatic transmission that is dried is entered in the formaldehyde enriching apparatus, until content of formaldehyde reaches the detection of the formaldehyde examination device
In limited time, send into the formaldehyde examination device.
10. method according to claim 9, it is characterised in that
When the volume that the volume for being dried gas reaches the temperature control de-watering apparatus is limited, the magnetic valve is opened, described dry
Pathogenic dryness is entered into the formaldehyde enriching apparatus；
When the formaldehyde enriching apparatus reach volume to be limited, the magnetic valve is opened, and the gas that is dried enters into the formaldehyde
In detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100866.3A CN106644667B (en) | 2017-02-23 | 2017-02-23 | System and method for detecting formaldehyde content in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100866.3A CN106644667B (en) | 2017-02-23 | 2017-02-23 | System and method for detecting formaldehyde content in air |
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| Publication Number | Publication Date |
|---|---|
| CN106644667A true CN106644667A (en) | 2017-05-10 |
| CN106644667B CN106644667B (en) | 2022-02-01 |
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ID=58846609
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710100866.3A Active CN106644667B (en) | 2017-02-23 | 2017-02-23 | System and method for detecting formaldehyde content in air |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110466307A (en) * | 2018-05-09 | 2019-11-19 | 江苏日盈电子股份有限公司 | In-car air quality control system, method and vehicle |
| CN110470792A (en) * | 2018-05-09 | 2019-11-19 | 江苏日盈电子股份有限公司 | Air quality acquisition methods and air quality obtain system |
| CN110780031A (en) * | 2018-07-31 | 2020-02-11 | 常州承信投资合伙企业(有限合伙) | Air quality detection device for vehicle and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466307A (en) * | 2018-05-09 | 2019-11-19 | 江苏日盈电子股份有限公司 | In-car air quality control system, method and vehicle |
| CN110470792A (en) * | 2018-05-09 | 2019-11-19 | 江苏日盈电子股份有限公司 | Air quality acquisition methods and air quality obtain system |
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| CN110780031A (en) * | 2018-07-31 | 2020-02-11 | 常州承信投资合伙企业(有限合伙) | Air quality detection device for vehicle and application thereof |
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| Publication number | Publication date |
|---|---|
| CN106644667B (en) | 2022-02-01 |
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