CN201477002U - Device for testing formaldehyde emission through pump suction method - Google Patents
Device for testing formaldehyde emission through pump suction method Download PDFInfo
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- CN201477002U CN201477002U CN2009202308172U CN200920230817U CN201477002U CN 201477002 U CN201477002 U CN 201477002U CN 2009202308172 U CN2009202308172 U CN 2009202308172U CN 200920230817 U CN200920230817 U CN 200920230817U CN 201477002 U CN201477002 U CN 201477002U
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Abstract
The utility model discloses a device for testing formaldehyde emission through pump suction method. The device adopts the structure that an air pipe is connected into a water-washing bottle; the air outlet pipe of the water-washing bottle is connected to a diaphragm filter; the air outlet pipe of the diaphragm filter is connected to the air inlet pipe of a drying vessel; the air inlet pipe of the drying vessel is connected to an air-flow meter; the outlet pipe of the air-flow meter is connected to a storage bottle in a drying oven; a test piece is stored in the storage bottle; the air outlet pipe at the bottom part of the storage bottle is connected into a formaldehyde absorption liquid vessel; and the air outlet pipe of the formaldehyde absorption liquid vessel is connected to an exhaust air outlet pipe through an air pump. The device has the advantages of no secondary pollution during the test, less chemical liquids used in the test process, low test cost, strong practicability, simple structure and convenient operation and use. The inspection standard definitely defines the formaldehyde emission, that is, the volatilization amount of gas is known as the emission, thereby meeting the requirements to the actual use of artificial boards. From the perspective of test security, the temperature, the pressure and the duration of the experimental device through the pump suction method can be automatically controlled, therefore no accident can occur during the test, and the security and the reliability are high.
Description
Technical field
The utility model relates to a kind of suction method formaldehyde and discharge proving installation, belong to formaldehyde and discharge technical field of measurement and test.
Background technology
What release was used always to indoor decorating material artificial board formaldehyde at present is that the perforation extraction detects; The following drawback that perforation method is deposited: produced secondary pollution one toluene in the experimentation of perforation method.The volatility of toluene is very big, be exposed to and be easy to diffusion in the air, humans and animals suction or skin contact a large amount of benzene and enter in the body, can cause acute and Chronic Benzene Poisoning, benzene is confirmed as strong carcinogenic substance by the World Health Organization (WHO), acute poisoning serves as main performance with middle nervous system inhibiting effect mainly, and then infringement is main performance to slow poisoning to hemopoietic system with benzene.Weight person shows as headache, feels sick, vomiting, unconsciousness, unconsciousness, stupor tic etc., severe patient can because the cental system paralysis and dead, slow poisoning can make red blood cell, leucocyte, platelet counts reduce, and makes chromosome aberration.Thereby cause leukaemia and alpastic anemia.Can cause neurasthenia syndrome, and skin and mucous membrane are had spread effect.Toluene toxicity mainly is to the damage of central nervous system and causes mucosa irritation, also can cause damage to kidney and liver.Much more serious benzene and benzene series thing be to the male sex to women's hazard ratio, and the women of child-bearing age suck benzene for a long time can cause menstrual disorder, and when the women in pregnancy period contacted, the incidence of disease of complications of pregnancy can significantly increase, even can cause the fetus birth defect.During for the content of formaldehyde in the tested test solution lower (such as the perforation value below 10mg/100g), adopt the iodometric titration method to carry out the formaldehyde quantitative test, measure data inaccurate, so can only adopt spectrophotometric method to test.Because the test philosophy of perforation extraction is that sample and formaldehyde the heat back are extracted the formaldehyde in the sample altogether, but not the release naturally of sample, in extraction because the acting in conjunction of toluene and temperature, chemical change also may take place and discharge formaldehyde in the organic substance of timber itself, timber Main Ingredients and Appearance cellulose, hemicellulose and lignin also are the potential sources of formaldehyde, and its burst size is than geocerellite much less.Cellulose and hemicellulose all belong to polysaccharose substance, and in timber drying, hexose can be biodegradable into light formaldehyde furfural under acid condition, further be decomposed into formaldehyde and furfural, and lignin also Diazolidinyl Urea under acid condition.The formaldehyde that lignin degradation produces is than hemicellulose and fibrination, thereby differs greatly between test result and the actual formaldehyde release value.(4) be the formaldehyde gas that wood-based plate discharges because of what jeopardize health safety.Offering some clarification on the test stone is burst size of methanal, also promptly is called burst size with what gas form volatilized.Still existing of not volatilizing then can not be called burst size in the sheet material.The free formaldehyde that the perforation extraction not only will not discharge extracts and counts burst size, and the chemical constitution that does not belong to free formaldehyde, also extracts and count burst size.This is the not science part of perforation extraction, so adopt perforation extraction measured result unreliable, unreasonable, it is always higher, and is inconsistent with reality.(5) from the security of test, the used toluene solution toxicity of perforation extraction is bigger, and accidents happened that probability is bigger in test.In whole test, must someone keep an eye on to prevent that proving installation from revealing or suck-back takes place and to cause the accident.
Summary of the invention
The utility model proposes a kind of suction method formaldehyde and discharge proving installation, be intended to overcome prior art and discharge existing above-mentioned defective with perforation extraction test formaldehyde.
Technical solution of the present utility model: its structure is that air hose 1 inserts in washing bottle 2, the escape pipe and the membrane filter 3 of washing bottle 2 join, the escape pipe of membrane filter 3 connects the draft tube of drying basin 4, the draft tube of drying basin 4 and air flowmeter 5 are joined, in the seasoning bottle 7 in the outlet access baking oven 6 of air flowmeter 5, deposit test specimen 8 in the seasoning bottle 7, seasoning bottle 7 bottom escape pipes insert in the formaldehyde absorbent device 9, and the escape pipe of formaldehyde absorbent device 9 joins by air pump 10 and exhaust emission tube.
Advantage of the present utility model: do not produce any secondary pollution at test process, can not produce any injury to operating personnel and environment, and the medicine that test process need the be used extraction of boring a hole will lack, thereby has saved testing cost, belongs to environmental protection, economizing type, practical method of testing.Suction method test be the content of formaldehyde that wood-based plate discharges because what jeopardize health safety is the formaldehyde gas that wood-based plate discharges.Offering some clarification on the test stone is burst size of methanal, also promptly is called burst size with what gas form volatilized.Therefore meet the actual request for utilization of wood-based plate.From the security of test, and the temperature of suction method experimental provision, pressure, suction time all are Automatic Control, generally can not have an accident security, reliability height.
Description of drawings
Accompanying drawing 1 is the structural representation that suction method formaldehyde discharges proving installation.
Among the figure 1 is atmosphere, the 2nd, washing bottle, the 3rd, and membrane filter, the 4th, drying basin, the 5th, air flowmeter, the 6th, baking oven, the 7th, seasoning bottle, the 8th, test specimen, the 9th, formaldehyde absorbent device, the 10th, air pump, the 11st, waste gas, 12-1,12-2,12-3,12-4 are respectively first, second, third, fourth solenoid valves.
Embodiment
The outlet of described air flowmeter 5 is interior by the seasoning bottle 7 in the first solenoid valve 12-1 access baking oven 6.
Described seasoning bottle 7 bottom escape pipes insert in the formaldehyde absorbent device 9 by the 3rd solenoid valve 12-3.
In order fully to collect the formaldehyde that test specimen discharges, change the flow direction of gas at seasoning bottle 7, the gas of the outlet of air flowmeter 5 inserts in the seasoning bottle 7 in the baking oven 6 by the second solenoid valve valve 12-2.
Described seasoning bottle 7 bottom escape pipes insert in the formaldehyde absorbent device 9 by the 4th solenoid valve 12-4.
The course of work: air hose 1 filters out through the formaldehyde that washing bottle 2 may exist in atmosphere, and the membrane filter 3 of flowing through then is being present in airborne oily substance or other impurity leaches.Cleaned air passes is removed moisture by drying basin 4 and is flowed through air flowmeter 5 meterings.Requiring air mass flow on the technology is 60L/h, can artificially regulate air flowmeter and guarantee measuring accuracy.Air quantitatively is inhaled in the test specimen seasoning bottle 7, and the seasoning bottle places in the baking oven 6, and temperature is 60 ℃ in the baking oven, and sample dimensions is 20mm * 20mm * thickness.Test specimen weight is 100g, and the suction time of heating is 6h, and under the effect of air temperature and current suction, the free formaldehyde in the test specimen can discharge and be dissolved in the formaldehyde that 100mL distilled water is housed continuously and receive in the liquid 9, and waste gas 11 enters atmosphere by air pump 10.
By particieboard and middle and higher density fiberboard, the happy yellowwood industry of part and the Kenya's medium density fibre board (MDF) of selecting for use Dare's artificial liner enterprise to produce.(detect according to the GB18580-2001 national standard, content of formaldehyde is selected E for use to select different plate kinds (particieboard and middle and higher density fiberboard), different thickness of slab, different content of formaldehyde for use
1Level, E
2Level and small part are greater than E
2Level).Test specimen is cut out saw in strict accordance with cutting edge 2mm operation, and dimensions is 20mm * 20mm * thickness mm.Same block of plate made two groups of test specimens, and one group is used for the perforation method test, and one group is used for suction method test (two groups of test specimens abut against together, think that in theory its formaldehyde emission value is identical).Carried out 28 groups of tests (every group of test repeats twice, averages) altogether, with suction method and the test of perforation extraction, its result is as follows respectively:
(1) the artificial board formaldehyde burst size measured value that records with perforation extraction and suction method, (y is the perforation value more satisfactory conversion relation: y=9.078x-1.1752 between the two; X is the suction value).
Can converse the measurement result of another kind of method from a kind of measurement result of method thus, illustrate that with suction method replacement perforation method mensuration middle and higher density plate and particieboard burst size of methanal be feasible.And along with the increase of wood-based plate water percentage, suction value and perforation value are in rising trend.
(2) two kinds of methods of perforation method and suction method exist obviously differently on principle, and promptly suction method is under temperature, pressure and air-flow suction, and the formaldehyde in the test specimen discharges and is dissolved in the Drexel bottle that distilled water is housed; The perforation extraction is that solvent toluene and test specimen is warm altogether, by liquid-solid extraction formaldehyde is dissolved out from sheet material, and the toluene that will be dissolved with formaldehyde then carries out liquid-liquid extraction by perforator and water, and formaldehyde is changeed soluble in water.Thereby the perforation extraction is " non-nature " release formaldehyde, and the formaldehyde with sheet material inside in the extraction process also counts, so the amount height that discharges than actual wood-based plate of the experiment value of its detection.When reality was used, the formaldehyde that contains in the plank not necessarily also can not all discharge, to not injury of human body.
(3) owing to adopt the perforation extraction to have contaminated environment and human body had weak point such as harm, thereby, when usual work is checked, do not need to do the perforation extraction, can test the formaldehyde release value of wood-based plate with suction method, calculate corresponding perforation value according to regression equation, can estimate to calculate the content of formaldehyde in the test specimen in view of the above, thereby minimizing is polluted and reduced cost most possibly.
Claims (3)
1. suction method formaldehyde discharges proving installation, it is characterized in that air hose inserts in the washing bottle, the escape pipe and the membrane filter of washing bottle join, the escape pipe of membrane filter connects the draft tube of drying basin, the draft tube and the air flowmeter of drying basin are joined, and the outlet of air flowmeter inserts in the interior seasoning bottle of baking oven, deposits test specimen in the seasoning bottle, seasoning bottle bottom escape pipe inserts in the formaldehyde absorbent device, and the escape pipe of formaldehyde absorbent device joins by air pump and exhaust emission tube.
2. suction method formaldehyde according to claim 1 discharges proving installation, it is characterized in that described seasoning bottle bottom escape pipe inserts in the formaldehyde absorbent device by the 3rd solenoid valve.
3. suction method formaldehyde according to claim 1 discharges proving installation, it is characterized in that the gas of the outlet of described air flowmeter inserts in the interior seasoning bottle of baking oven by two solenoid valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202308172U CN201477002U (en) | 2009-09-08 | 2009-09-08 | Device for testing formaldehyde emission through pump suction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202308172U CN201477002U (en) | 2009-09-08 | 2009-09-08 | Device for testing formaldehyde emission through pump suction method |
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| Publication Number | Publication Date |
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| CN201477002U true CN201477002U (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202308172U Expired - Fee Related CN201477002U (en) | 2009-09-08 | 2009-09-08 | Device for testing formaldehyde emission through pump suction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323115A (en) * | 2011-08-27 | 2012-01-18 | 福州大学 | Air sampler |
| CN102798702A (en) * | 2012-08-16 | 2012-11-28 | 南京林业大学 | Artificial board formaldehyde emission testing device with air chamber temperature control system |
| CN104390815A (en) * | 2013-10-23 | 2015-03-04 | 中国科学院地球环境研究所 | Automatic gas collection device and method thereof |
| CN106313204A (en) * | 2016-08-26 | 2017-01-11 | 索菲亚家居股份有限公司 | Production technology for low-odor environment-friendly laminated board |
| CN111289458A (en) * | 2020-03-04 | 2020-06-16 | 山西新华化工有限责任公司 | Detection method for ammonia gas overflowing from ASC type impregnated activated carbon |
-
2009
- 2009-09-08 CN CN2009202308172U patent/CN201477002U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323115A (en) * | 2011-08-27 | 2012-01-18 | 福州大学 | Air sampler |
| CN102798702A (en) * | 2012-08-16 | 2012-11-28 | 南京林业大学 | Artificial board formaldehyde emission testing device with air chamber temperature control system |
| CN102798702B (en) * | 2012-08-16 | 2015-02-18 | 南京林业大学 | Artificial board formaldehyde emission testing device with air chamber temperature control system |
| CN104390815A (en) * | 2013-10-23 | 2015-03-04 | 中国科学院地球环境研究所 | Automatic gas collection device and method thereof |
| CN106313204A (en) * | 2016-08-26 | 2017-01-11 | 索菲亚家居股份有限公司 | Production technology for low-odor environment-friendly laminated board |
| CN111289458A (en) * | 2020-03-04 | 2020-06-16 | 山西新华化工有限责任公司 | Detection method for ammonia gas overflowing from ASC type impregnated activated carbon |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20180908 |
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| CF01 | Termination of patent right due to non-payment of annual fee |