CN209764815U - Formaldehyde purification detection device - Google Patents
Formaldehyde purification detection device Download PDFInfo
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- CN209764815U CN209764815U CN201822185501.8U CN201822185501U CN209764815U CN 209764815 U CN209764815 U CN 209764815U CN 201822185501 U CN201822185501 U CN 201822185501U CN 209764815 U CN209764815 U CN 209764815U
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Abstract
The utility model discloses a formaldehyde purification detection device, include: closed box, formaldehyde detector and CO2A detector and a fan, wherein the fan is arranged inside the closed box body, the formaldehyde detector and the CO are arranged2The detector is respectively communicated with the inside of the closed box body and is used for detecting the concentration of formaldehyde and CO in the closed box body2And (4) concentration.
Description
Technical Field
The utility model relates to an air purification field especially relates to a formaldehyde purification detection device.
Background
Formaldehyde is a colorless gas with strong pungent smell, is commonly found in indoor or vehicle interior decoration and finishing materials, and is a harmful substance with long release period and great harm to human bodies. The formaldehyde removing products in the existing market mainly comprise active carbon, photocatalyst spray, active manganese decomposition tablets, green plants and the like.
The performance detection standards of the existing formaldehyde purification products mainly comprise: QB/T2761-2006 indoor air purification product purification effect determination method and JC/T1074-2008 indoor air purification function coating material purification performance, but the existing detection method cannot visually detect the purification mechanism of the formaldehyde removal product and is not suitable for rapidly screening or demonstrating the formaldehyde purification effect of the product.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a formaldehyde purification detection device capable of simply, rapidly and intuitively detecting the purification effect and purification mechanism of the formaldehyde removal product aiming at the problem that the purification mechanism of the formaldehyde removal product is difficult to intuitively detect.
A formaldehyde purification detection device, comprising: closed box, formaldehyde detector and CO2A detector and a fan, wherein the fan is arranged inside the closed box body, the formaldehyde detector and the CO are arranged2The detector is respectively communicated with the inside of the closed box body and is used for detecting the concentration of formaldehyde and CO in the closed box body2And (4) concentration.
In one embodiment, the device further comprises an exhaust fan, and the CO is used for generating CO2The formaldehyde detector is arranged in the airtight box body, the formaldehyde detector and the exhaust fan are arranged outside the airtight box body, and the airtight box body, the exhaust fan and the formaldehyde detector are sequentially connected in series through a pipe body to form a circulation loop.
In one embodiment, the formaldehyde purification detection device further comprises a flow meter, and the flow meter is connected in series in the circulation loop through a pipe body.
in one embodiment, the closed box body comprises a top cover, the top of the closed box body is provided with a feed inlet, the top cover is used for sealing the feed inlet, and the diameter of the feed inlet is 5 cm-10 cm.
In one of them embodiment, still including setting up at the inside formaldehyde generator of airtight box, formaldehyde generator includes heating element and formaldehyde source cell body, formaldehyde source cell body is used for holding formaldehyde solution or paraformaldehyde solid, heating element is used for to formaldehyde solution or paraformaldehyde solid heating.
In one embodiment, the formaldehyde detector comprises an electrochemical sensor, and the CO is2The detector includes one or more of an infrared carbon dioxide sensor, a catalytic carbon dioxide sensor, and a thermally conductive carbon dioxide sensor.
In one embodiment, the fan is capable of changing the blowing direction by rotation.
In one embodiment, the closed box is a transparent box.
In one embodiment, the volume of the closed box body is 15 to 30 cubic decimeters.
In one embodiment, the formaldehyde purification detection device further comprises a control component, the control component is arranged outside the closed box body, and the control component, the formaldehyde detector and the CO are arranged2At least one of the detector and the formaldehyde generator is electrically connected.
The utility model discloses a formaldehyde purification detection device can be used for the quick screening to remove the aldehyde product. By arranging a formaldehyde detector and CO in the formaldehyde purification detection device at the same time2A detector capable of simultaneously characterizing formaldehyde concentration and CO in the formaldehyde purification detection device2A change in (c). When the formaldehyde removing product is screened, the formaldehyde removing product is placed in the closed box under the same detection condition, and the higher the formaldehyde concentration reduction in the formaldehyde purification device detected by the formaldehyde detector is, the stronger the formaldehyde removing capability of the formaldehyde removing product is. In the same time, the CO2CO detected by the detector2The concentration is increased, which indicates that the formaldehyde removal product realizes the removal of formaldehyde by decomposing formaldehyde, and CO2The more the concentration is increased, the higher the formaldehyde decomposition efficiency of the formaldehyde removal product is; CO 22The concentration is not increased, which indicates that the formaldehyde removal product only realizes the removal of formaldehyde in the air through adsorption. By controlling the concentration of formaldehyde and CO2The comprehensive comparison of the concentration change can characterize the aldehyde removal efficiency and the aldehyde removal mechanism of different aldehyde removal products, and is favorable for intuition,The aldehyde-removing product is simply and quickly screened.
Drawings
fig. 1 is a schematic structural view of a formaldehyde purification and detection device according to an embodiment of the present invention;
FIG. 2 is a data diagram illustrating the formaldehyde purification effect of the formaldehyde removal product according to an embodiment of the present invention;
FIG. 3 is a data diagram of the formaldehyde purification effect of the formaldehyde removal product according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following embodiment is used in conjunction with the accompanying drawings to further explain the formaldehyde purification and detection device of the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
it will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. The various objects of the drawings are drawn to scale for ease of illustration and not to scale for actual components.
Referring to fig. 1, an embodiment of the present invention provides a formaldehyde purification and detection apparatus, including: closed box 1, formaldehyde detector 3, CO2A detector 4 and a fan 5, wherein the fan 5 is arranged in the closed box body 1, and the formaldehyde detector 3 and the CO are arranged2The detector 4 is respectively communicated with the inside of the closed box body 1 and is used for detecting the concentration of formaldehyde and CO in the closed box body 12And (4) concentration.
formaldehyde purification detection device can be used for the quick screening to remove the aldehyde productAnd (5) preparing the product. By arranging a formaldehyde detector 3 and CO in the formaldehyde purification detection device at the same time2A detector 4 capable of simultaneously representing the concentration of formaldehyde and CO in the formaldehyde purification detection device2A change in (c). When the formaldehyde removing product is screened, the formaldehyde removing product is placed in the closed box body 1 under the same detection condition, and the higher the formaldehyde concentration reduction amount in the formaldehyde purification device detected by the formaldehyde detector 3 is in the same time, the stronger the formaldehyde removing capability of the formaldehyde removing product is. In the same time, the CO2CO detected by the detector 42The concentration is increased, which indicates that the formaldehyde removal product realizes the removal of formaldehyde through the decomposition of formaldehyde, and CO2The more the concentration is increased, the higher the formaldehyde decomposition efficiency of the formaldehyde removal product is; CO 22The concentration is not increased, which indicates that the formaldehyde removal product only realizes the removal of formaldehyde in the air through adsorption. By controlling the concentration of formaldehyde and CO2The comprehensive comparison of the concentration change can represent the aldehyde removal efficiency and the aldehyde removal mechanism of different aldehyde removal products, and is favorable for intuitively, simply and quickly screening the aldehyde removal products.
In one embodiment, the containment vessel 1 has a source of formaldehyde therein. The formaldehyde purification detection device may include at least one of a formaldehyde gas introduction pipe (not shown) or a formaldehyde generator 2 provided inside the airtight box. And introducing the formaldehyde gas into the pipe body or providing the formaldehyde gas for the closed box body by the formaldehyde gas generator 2.
According to the volume of the airtight box body 1, the formaldehyde purification detection device can be used for detecting the formaldehyde removal product which can be placed in the airtight box body 1. The smaller the size of the closed box 1 is, the more obvious the change of the internal gas concentration is, the formaldehyde detector 3 and CO are2The lower the sensitivity requirement of the detector 4, the same sensitivity of the formaldehyde detector 3 and the CO is used2The shorter the detection period of the detector 4 is, the more the screening efficiency can be improved, so that the present embodiment is particularly suitable for detecting a small-sized formaldehyde purifier and a formaldehyde purifying material. In one embodiment, the volume of the enclosure 1 may be 15 to 30 cubic decimeters.
The method for removing aldehyde from the aldehyde-removing product can comprisePhysical, chemical and biological methods. The physical method is to adopt aldehyde-removing products such as active carbon and the like to adsorb formaldehyde; the chemical method adopts chemical reagents and formaldehyde to generate chemical changes, and formaldehyde removing products such as a formaldehyde purifier of a nano technology, a photocatalyst spray, a formaldehyde decomposition sheet and the like; the biological method is to adopt plants to absorb formaldehyde or adopt microorganisms and enzymes to carry out biological oxidation and decomposition. The formaldehyde removal product mainly comprises two formaldehyde removal modes of adsorption and decomposition, and the main product of formaldehyde decomposition is CO2And, the formaldehyde purification detection device of the utility model changes the formaldehyde concentration and the CO2And comprehensively comparing the concentration change to quickly evaluate the aldehyde removal mechanism of the aldehyde removal product.
The shape of the closed casing 1 may be a cube or an irregular shape, and is preferably a rectangular parallelepiped or a square cube. Preferably, the closed box 1 may be a transparent box. Will airtight box 1 sets up to transparent box can be more convenient observation the inside state of airtight box 1 to can be to the inside of airtight box 1 carries out real time monitoring.
The formaldehyde detector 3 and the CO2The detector 4 may be disposed inside or outside the sealed box 1, and may be specifically configured according to the formaldehyde detector 3 and the CO2The volume of the detector 4 and the volume of the enclosure 1 are adjusted.
In an embodiment, the formaldehyde detector 3 may be disposed outside the enclosure 1, so that the space occupied inside the enclosure 1 can be reduced. Formaldehyde purifies detection device can also include air exhauster 6, formaldehyde detector 3 with air exhauster 6 can set up the outside of seal box 1, seal box 1 exhaust exhauster 6 with formaldehyde detector 3 establishes ties in proper order through the body and forms circulation circuit. The inside waiting of seal box 1 waits for gas to pass through air exhauster 6 gets into formaldehyde detector 3 is right wait for formaldehyde concentration in the gas to detect, later wait for gas by formaldehyde detector 3 gets back to once more in the seal box 1 with gas in the seal box 1 mixes, circulates in proper order, records in different periods of time formaldehyde concentration in the seal box 1.
Optionally, the CO2The detector 4 can be arranged inside the capsule 1 or in series with the circulation circuit outside the capsule 1 through a tube.
In an embodiment, the formaldehyde detector 3 may comprise an electrochemical sensor. When formaldehyde gas passes through the electrochemical sensor, under the catalytic action of electrolyte, formaldehyde gas molecules generate oxidation-reduction reaction on the electrode to form electron transfer, and under the action of external voltage, current in direct proportion to the concentration of formaldehyde is formed, and the current signal is amplified and displayed through a precision amplifier. Preferably, the CO is2The detector 4 may include, but is not limited to, one or more of an infrared carbon dioxide sensor, a catalytic carbon dioxide sensor, and a thermally conductive carbon dioxide sensor. The infrared carbon dioxide sensor utilizes the principle of utilizing non-dispersive infrared to measure the CO existing in the gas2And (6) detecting. The catalytic carbon dioxide sensor converts the detected carbon dioxide concentration into a standard current signal output. The heat conduction carbon dioxide sensor is used for detecting CO in the gas to be detected according to the total heat conductivity coefficient of the gas2The principle that the content changes is detected.
In an embodiment, the formaldehyde purification detection device further comprises a flow meter 7, and the flow meter 7 is connected in series in the circulation loop outside the enclosure box 1 through a pipe body. The flow meter 7 may be provided on a pipe between the exhaust fan 6 and the formaldehyde detector 3, or on a pipe between the formaldehyde detector 3 and the enclosure 1. The flow meter 7 may comprise one or more of a differential pressure flow meter, a rotameter, a throttling flow meter, a slit flow meter, a volumetric flow meter, an electromagnetic flow meter and an ultrasonic flow meter. Preferably, the flow meter 7 is a rotameter. The flow rate of the gas to be examined in the circulation circuit can be monitored by means of the flow meter 7. Preferably, the flow rate of the gas to be detected can be controlled within the range of 400mL/min to 800mL/min, and the flow stability and the mixing uniformity of the gas in the circulation loop and the closed box body 1 are ensured within the flow rate range.
Preferably, the formaldehyde purification detection device comprises a bracket (not shown) for increasing the height of one or more components in the formaldehyde purification detection device, so that the connection structure of the components of the formaldehyde purification detection device is more consistent. The bracket can be arranged on the formaldehyde detector 3, the exhaust fan 6, the flowmeter 7 and the CO2A detector 4 and a bottom of at least one of the formaldehyde generators 2. Preferably, the stent has good mechanical support properties and corrosion resistance. The bracket may include at least one of an aluminum bracket and a stainless steel bracket.
In an embodiment, the formaldehyde generator 2 can generate formaldehyde gas, and may include a heating assembly and a formaldehyde source tank, wherein the formaldehyde source tank is used for containing formaldehyde solution or paraformaldehyde solid, and the heating assembly is used for heating the formaldehyde solution or the paraformaldehyde solid. The heating assembly can include an electric heating piece, the electric heating piece is arranged at the bottom of the formaldehyde source tank body, and the formaldehyde solution or the paraformaldehyde solid is heated to volatilize the formaldehyde solution or the paraformaldehyde solid to form formaldehyde gas. The heating temperature of the heating component can be 40-80 ℃. The formaldehyde generator 2 can be arranged at the bottom of the closed box body 1 or at the middle position of the closed box body 1 through the bracket. Preferably, the formaldehyde generator 2 is capable of releasing formaldehyde gas for a predetermined time and stopping the release of formaldehyde gas in a closed state. For example, the energization time of the heating unit may be controlled such that the formaldehyde generator 2 releases the formaldehyde gas when the heating unit is energized for heating, and the formaldehyde generator 2 stops the release of the formaldehyde gas when the heating is stopped.
The fan 5 is used for forming airflow in the closed box body 1 so as to enable the air to be uniformly distributed. Preferably, the fan 5 is capable of changing the blowing direction by rotation, which may be, for example, greater than or equal to 90 °. The fan 5 is capable of blowing the formaldehyde gas or CO close to and away from the aldehyde-removing product2Gas exchange is carried out to ensure that the closed box body 1 is internally provided withMore uniform density of formaldehyde gas and CO2The gas density is more uniform. The rotation speed of the fan 5 may be 60rpm/min to 1000 rpm/min.
The formaldehyde removing product is arranged inside the closed box body 1. Alternatively, the aldehyde-removing product may be provided at the bottom of the enclosure 1, suspended in the enclosure 1, or provided on the support. Preferably, the aldehyde removing product is hung on the closed box body 1 or arranged on the bracket, so that the aldehyde removing product is ensured to be positioned in the middle of the closed box body 1, and the uniformity of the gas density in the closed box body 1 is favorably maintained.
In an embodiment, the formaldehyde purification detection device further comprises a control component, the control component is arranged outside the closed box body 1, and the control component can be connected with the formaldehyde detector 3, the exhaust fan 6, the flowmeter 7 and the CO detector2A detector 4 electrically connected to at least one of the formaldehyde generators 2 for controlling the formaldehyde detector 3, the exhaust fan 6, the flow meter 7, and the CO2The opening and closing of at least one of the detector 4 and the formaldehyde generator 2. Preferably, the control component can also control the formaldehyde gas generation rate of the formaldehyde generator 2, and particularly, the control component can control the heating temperature and time of the heating component.
In an embodiment, the enclosure body 1 may include a top cover 8, the top of the enclosure body 1 may be opened with a charging opening, and the top cover 8 is used for sealing the charging opening. The formaldehyde solution, the paraformaldehyde solid or the formaldehyde-removing product can be put into the closed box body 1 through the feed opening. Preferably, the closed box 1 comprises a sealing element, and the sealing element is arranged between the charging opening and the top cover 8 and used for improving the sealing performance of the top cover 8 on the charging opening. The diameter of the feed inlet can be 5 cm-10 cm. The diameter of charge door should not too big, avoids adding when removing aldehyde product the outdiffusion of the inside gas of seal box 1.
The embodiment of the utility model provides an utilize formaldehyde purification detection device detects the method of removing the purifying effect of aldehyde product can include following step:
Placing a formaldehyde solution or a paraformaldehyde solid in the formaldehyde generator 2, and keeping the formaldehyde generator 2 running for a certain period of time to enable the closed box body 1 to form formaldehyde gas with a certain concentration;
Stopping the formaldehyde generator 2 and recording the data of the formaldehyde detector 3; and
Placing the formaldehyde-removing product in the closed box 1, and recording the formaldehyde detector and the CO2Data of the detector 4 at a specific point in time.
Example 1
The top cover 8 of the closed box body 1 is opened, 20 microliters of formaldehyde solution with the concentration of 37% or paraformaldehyde solid is added into a formaldehyde source tank body of the formaldehyde generator 2, then the top cover 8 is closed, the gas in the closed box body 1 is fully mixed after being stirred by the fan 5, flows through the flow meter 7 under the action of the exhaust fan 6 and enters the formaldehyde detector 3, contacts with the electrochemical sensor in the formaldehyde detector 3 to display the formaldehyde concentration in an induction manner, and then flows back to the closed box body 1 to form a closed gas circulation loop.
Referring to FIG. 2, after 40 minutes, the formaldehyde concentration of the formaldehyde detector 3 is 100ppm, CO2The indication of detector 4 is 710 ppm. The formaldehyde generator 2 is controlled to be closed through the control assembly, the top cover 8 of the closed box body 1 is opened, the active carbon of the formaldehyde removal product to be detected is rapidly placed in the closed box body 1, and the formaldehyde detector 3 and CO are observed and recorded2The data of the detector 4 changes. After 90 minutes, the indication concentration of the formaldehyde detector 3 was 37ppm, CO2The indication of the detector 4 was 660ppm, from which it was judged that the formaldehyde-removing product, activated carbon, was mainly adsorbing and free from oxidative decomposition.
Example 2
The top cover 8 of the closed box body 1 is opened, 20 microliters of formaldehyde solution with the concentration of 37% or paraformaldehyde solid is added into a formaldehyde source tank body of the formaldehyde generator 2, then the top cover 8 is closed, the gas in the closed box body 1 is fully mixed after being stirred by the fan 5, flows through the flow meter 7 under the action of the exhaust fan 6 and enters the formaldehyde detector 3, contacts with the electrochemical sensor in the formaldehyde detector 3 to display the formaldehyde concentration in an induction manner, and then flows back to the closed box body 1 to form a closed gas circulation loop.
Referring to FIG. 3, after 40 minutes, the formaldehyde concentration of the formaldehyde detector 3 is 100ppm, CO2The indication of detector 4 is 750 ppm. The formaldehyde generator 2 is controlled to be closed through the control assembly, the top cover 8 of the closed box body 1 is opened, formaldehyde decomposition sheets of the formaldehyde-removing product to be detected are rapidly placed in the closed box body 1, and the formaldehyde detector 3 and the CO are observed and recorded2The data of the detector 4 changes. After 90 minutes, the indication concentration of the formaldehyde detector 3 was 19ppm, CO2The indication of the detector 4 was 900ppm, and it was judged that the formaldehyde-removing product, formaldehyde-decomposing sheet, was mainly used for the purification of formaldehyde by oxidative decomposition and was decomposed into carbon dioxide.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a formaldehyde purification detection device which characterized in that includes: closed box, formaldehyde detector and CO2A detector and a fan, wherein the fan is arranged inside the closed box body, the formaldehyde detector and the CO are arranged2the detector is respectively communicated with the inside of the closed box body and is used for detecting the concentration of formaldehyde and CO in the closed box body2And (4) concentration.
2. The formaldehyde purification detection device of claim 1, further comprising an exhaust fan, wherein the CO is purified by the exhaust fan2The formaldehyde detector is arranged in the airtight box body, the formaldehyde detector and the exhaust fan are arranged outside the airtight box body, and the airtight box body, the exhaust fan and the formaldehyde detector are sequentially connected in series through a pipe body to form a circulation loop.
3. The formaldehyde purification detection device according to claim 2, further comprising a flow meter connected in series in the circulation loop through a pipe.
4. The formaldehyde purification detection device according to claim 1, wherein the sealed box body comprises a top cover, a feed opening is formed in the top of the sealed box body, the top cover is used for sealing the feed opening, and the diameter of the feed opening is 5 cm-10 cm.
5. The formaldehyde purification detection device of claim 1, further comprising a formaldehyde generator arranged inside the closed box body, wherein the formaldehyde generator comprises a heating assembly and a formaldehyde source tank body, the formaldehyde source tank body is used for containing formaldehyde solution or paraformaldehyde solids, and the heating assembly is used for heating the formaldehyde solution or the paraformaldehyde solids.
6. The formaldehyde purification detection device of claim 1, wherein the formaldehyde detector comprises an electrochemical sensor, and wherein the CO is present in the electrochemical sensor2The detector includes one or more of an infrared carbon dioxide sensor, a catalytic carbon dioxide sensor, and a thermally conductive carbon dioxide sensor.
7. The formaldehyde purification detection device of claim 1, wherein the fan is capable of changing a blowing direction by rotating.
8. The formaldehyde purification detection device of claim 1, wherein the containment box is a transparent box.
9. The formaldehyde purification detection device as claimed in claim 1, wherein the volume of the enclosed box is 15 to 30 cubic decimeters.
10. The formaldehyde purification detection device as claimed in claim 5, further comprising a control unit disposed outside the enclosure, wherein the control unit is connected to the formaldehyde detector and the CO detector2At least one of the detector and the formaldehyde generator is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822185501.8U CN209764815U (en) | 2018-12-25 | 2018-12-25 | Formaldehyde purification detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822185501.8U CN209764815U (en) | 2018-12-25 | 2018-12-25 | Formaldehyde purification detection device |
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| CN209764815U true CN209764815U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927053A (en) * | 2019-12-13 | 2020-03-27 | 蒋国政 | Environmental protection material toxic substance volatilization check out test set |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927053A (en) * | 2019-12-13 | 2020-03-27 | 蒋国政 | Environmental protection material toxic substance volatilization check out test set |
| CN110927053B (en) * | 2019-12-13 | 2022-07-01 | 深圳市集洁号环保科技有限公司 | Environmental protection material toxic substance volatilization check out test set |
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