CN102798702A - Artificial board formaldehyde emission testing device with air chamber temperature control system - Google Patents
Artificial board formaldehyde emission testing device with air chamber temperature control system Download PDFInfo
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- CN102798702A CN102798702A CN2012102902646A CN201210290264A CN102798702A CN 102798702 A CN102798702 A CN 102798702A CN 2012102902646 A CN2012102902646 A CN 2012102902646A CN 201210290264 A CN201210290264 A CN 201210290264A CN 102798702 A CN102798702 A CN 102798702A
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Abstract
The invention relates to an artificial board formaldehyde emission testing device with an air chamber temperature control system. The device comprises an air pipe, a washing bottle, a drying ware, a drying oven, a first formaldehyde absorption liquid apparatus, and a secondary formaldehyde absorption liquid apparatus. Specifically, the air pipe is connected into the washing bottle, the air outlet pipe of which is in connection with a membrane filter. The air outlet pipe of the membrane filter is connected to the air inlet pipe of the drying ware, the air outlet pipe of which is connected into the drying oven through an air flowmeter. A test piece box is stored in the drying oven, and a test piece is placed in the test piece box. A hot water jacket is installed on the surface of the drying oven. An air outlet pipe at the bottom of the drying oven is connected into the first formaldehyde absorption liquid apparatus, the air outlet pipe of which is connected into the secondary formaldehyde absorption liquid apparatus. The device provided in the invention has the advantages of: no generation of any secondary pollutant in a testing process, no harm to the operation staff and the environment, and less drugs required in the testing process than the perforation extraction method, thus saving the testing cost. And the device has the characteristics of environmental protection, energy saving, and strong practicability, etc.
Description
Technical field
What the present invention relates to is a kind of artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system, belongs to formaldehyde and discharges 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; Perforation method is the detection method of the test artificial board formaldehyde burst size that generally adopts of artificial board enterprise; The disadvantage of this method be every test once, with the toluene that produces the 600ml severe toxicity, useless toluene intractable; And processing cost is high, causes time secondary environmental pollution easily.This toluene is a kind of colourless, liquid with special aromatic odor, and it has characteristics such as volatile, inflammable, is the major pollutants of commercial production and indoor environment.Therefore, as a kind of method that detects artificial board formaldehyde burst size, purpose is to control and handle the formaldehyde pollution problem of wood-based plate; Yet perforation method but produces new pollutant toluene at test process.
In addition; Adopt the perforation cooking process; Also can produce formaldehyde in the composition lignin degradation process under the high temperature in the wood-based plate, and the formaldehyde amount that produces is than other Main Ingredients and Appearances of timber: hemicellulose and cellulose are also many, thereby differ greatly between perforation method test result and the actual formaldehyde release value.Yet 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.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, thus adopt the perforation extraction to survey as a result that it is always higher, inconsistent with reality.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 cause the accident.
Summary of the invention
What the present invention proposed is a kind of artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system; Be intended to overcome prior art and discharge existing above-mentioned defective with perforation extraction test formaldehyde; And optimize suction method formaldehyde discharge proving installation: a, in collecting formaldehyde plant; Be improved to two Drexel bottles (filling 50ml distilled water in each Drexel bottle), twice collection reaches the purpose of collecting formaldehyde more fully; B, with water-bath heating and attemperator, be improved to hot water jacket adjunction Automatic Cycle pumping unit and realize, improved the temperature accuracy in the test specimen case, and saved the space of laying tank; C, the integrated industrial computer of employing carry out collection and the control of temperature, pressure and time, and parameter values such as temperature, pressure and time carry out intellectuality to be handled, and sets up LCDs.
Technical solution of the present invention: it is characterized in that comprising air hose, washing bottle, drying basin, baking oven, formaldehyde absorbent device, formaldehyde absorbent device; Wherein air hose inserts in the washing bottle, and the escape pipe and the membrane filter of washing bottle join, and the escape pipe of membrane filter connects the draft tube of drying basin; The escape pipe of drying basin inserts in the baking oven through air flowmeter; Deposit the test specimen case in the baking oven, place test specimen in the test specimen case, the appearance of baking oven is equipped with hot water jacket; The escape pipe of baking oven bottom inserts in the formaldehyde absorbent device, and the escape pipe of formaldehyde absorbent device inserts the formaldehyde absorbent device.
Advantage of the present invention: 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 practiced thrift 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.
Description of drawings
Fig. 1 is the structural representation that has the artificial board formaldehyde burst size proving installation of air chamber temperature adjusting system.
Among Fig. 11 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, test specimen case, the 8th, test specimen, the 9th, hot water jacket, the 10th, Automatic Cycle pump, 11 are formaldehyde absorbent devices, the 12nd, secondary formaldehyde absorbent device, the 13rd, air pump, the 14th, waste gas, 15-1,15-2,15-3,15-4 are solenoid valves.
Embodiment
Described formaldehyde absorbent device 12 joins through air pump 13 and waste gas 14 vent pipes.
Described hot water jacket 9 adjunction Automatic Cycle pumps 10.
The outlet of described air flowmeter 5 inserts in the baking oven 6 through solenoid valve 15-1.
Described baking oven 6 bottom escape pipes insert in the formaldehyde absorbent device 11 through solenoid valve 15-3.
The outlet of described air flowmeter 5 inserts in the test specimen case 7 through solenoid valve 15-2.
Described test specimen case 7 bottom escape pipes insert in the formaldehyde absorbent device 11 through solenoid valve 15-4.
The course of work: air hose 1 filters out the formaldehyde that possibly exist in the atmosphere through washing bottle 2, and the membrane filter 3 of flowing through then is being present in airborne oily substance or other impurity leaches.Pretreated air is removed moisture through 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 test specimen places in the test specimen case 7, and test specimen the temperature inside the box is 60 ℃, and sample dimensions is 20mm * 20mm * thickness.Test specimen weight is 100g; The suction time of heating is 6h; Under the effect of air temperature and current suction, the free formaldehyde in the test specimen can discharge continuously and be dissolved in formaldehyde absorbent device 11 that 100mL distilled water is housed, the secondary formaldehyde absorbent device 12, and waste gas 14 enters atmosphere through air pump 13.
Through particieboard and middle and higher density fiberboard and the Kenya's medium density fibre board (MDF) of selecting for use Dare's artificial liner enterprise to produce.(detect according to 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 few 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 repetition twice averaged) altogether, with suction method and the test of perforation extraction, its result is following respectively:
(1) the artificial board formaldehyde burst size measured value that records with perforation extraction and suction method, (y is the perforation value to have more satisfactory conversion relation: y=9.235x-1.0654 between the two; X is the suction value).Can converse the mensuration result of another kind of method from a kind of mensuration result of method thus, explain 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, from sheet material, is dissolved out formaldehyde through liquid-solid extraction, and the toluene that will be dissolved with formaldehyde then carries out liquid-liquid extraction through perforator and water, changes soluble in water to formaldehyde.Thereby the perforation extraction is " non-nature " release formaldehyde, and formaldehyde in the extraction process that sheet material is inner also counts, so the experiment value of its detection is higher than the amount that actual wood-based plate discharges.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, need not 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 in view of the above to calculate the content of formaldehyde in the test specimen, thereby minimizing is polluted and reduced cost most possibly.
Under the effect of air pump suction, air filters through the air purge bottle, and the formaldehyde that possibly exist in the air is dissolved in the distilled water; Air after filtering then continues to fall contaminant filters such as airborne greasy dirt through membrane filter; And then through the instrument air dryer bottle, dried air is the test specimen case under getting into;
Adopt hot water jacket adjunction Automatic Cycle pumping unit to guarantee that temperature is controlled at 60 ° of C ± 0.5 ° C;
In order fully to collect the formaldehyde that test specimen discharges, change the flow direction of gas automatically through solenoid valve at the test specimen case, and through air flowmeter control air flow velocity.
Adopt temperature control to adopt that PID regulates, pressure transducer respectively, pressure control can be passed through the rotational pressure by-pass cock, the temperature and pressure that on-line control system will checkout equipment;
This equipment adopts integrated industrial computer to carry out collection and the control of temperature, pressure and time, and parameter values such as temperature, pressure and time carry out intellectuality to be handled, and the operation information of equipment is presented on the touch-screen convenient the observation; Centre panel is the air chamber of independently working, and sample is put into this air chamber on request, and the door with air chamber closes then; Get into the test acquisition state; Can see bubble in the sampling bottle, preset the gas production time and the sampling bottle timesharing is connected that sampling continues to adjust to automatically in 6 hours original state;
Mining cylinder group sampling bottle placed in the bracket, the bracket sliding rail, when not in use can be returned to take up less space; right side is sealed air chamber door, release the sealed door beams in the middle of the knurled hand wheel to the right to turn on the rotating beam sealed gas chamber door, place or remove the sample; side plus outlet for water to sink and replace the filter material, equipment run time should ensure that there is enough water in the tank;
During this device to test sample, operative norm: LY/T 1978-2011 " burst size of methanal mensuration suction method ";
Two sampling bottles collecting formaldehyde should inject 50ml distilled water respectively, and two one group, flexible pipe connects, and is placed on the carriage, and connects with the instrument gas outlet.
Claims (7)
1. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system is characterized in that comprising air hose, washing bottle, drying basin, baking oven, formaldehyde absorbent device, formaldehyde absorbent device, and wherein 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, and the escape pipe of drying basin inserts in the baking oven through air flowmeter, deposits the test specimen case in the baking oven; Place test specimen in the test specimen case; The appearance of baking oven is equipped with hot water jacket, and the escape pipe of baking oven bottom inserts in the formaldehyde absorbent device, and the escape pipe of formaldehyde absorbent device inserts the formaldehyde absorbent device.
2. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that the formaldehyde absorbent device joins through air pump and exhaust emission tube.
3. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that hot water jacket adjunction Automatic Cycle pump.
4. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that the outlet of described air flowmeter inserts in the baking oven through first solenoid valve.
5. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that described baking oven bottom escape pipe inserts in the formaldehyde absorbent device through the 3rd solenoid valve.
6. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that the outlet of air flowmeter inserts in the test specimen case through second solenoid valve.
7. the artificial board formaldehyde burst size proving installation that has air chamber temperature adjusting system according to claim 1 is characterized in that described test specimen case bottom escape pipe inserts in the formaldehyde absorbent device through the 4th solenoid valve.
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| CN201210290264.6A CN102798702B (en) | 2012-08-16 | 2012-08-16 | Artificial board formaldehyde emission testing device with air chamber temperature control system |
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| CN201210290264.6A CN102798702B (en) | 2012-08-16 | 2012-08-16 | Artificial board formaldehyde emission testing device with air chamber temperature control system |
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| CN102798702A true CN102798702A (en) | 2012-11-28 |
| CN102798702B CN102798702B (en) | 2015-02-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158374A (en) * | 2015-09-26 | 2015-12-16 | 南京林业大学 | VOC detecting device in hot-pressing process of wooden composite plate |
| CN110027079A (en) * | 2019-05-10 | 2019-07-19 | 中国林业科学研究院木材工业研究所 | Formaldehydogenic method is produced in a kind of absorption timber high-temperature drying procedures |
| CN110658347A (en) * | 2019-10-11 | 2020-01-07 | 天津市滨海新区塘沽滨海建筑工程质量检测中心有限公司 | Automatic formaldehyde detection equipment and formaldehyde detection method |
| CN111781195A (en) * | 2020-07-02 | 2020-10-16 | 东营市盛基环保工程有限公司 | Method for detecting formaldehyde emission in formaldehyde-free artificial board |
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|---|---|---|---|---|
| CN1570592A (en) * | 2004-05-11 | 2005-01-26 | 南京林业大学 | Pumping measurement method for formaldehyde release quantity of artificial board |
| CN201311379Y (en) * | 2008-12-15 | 2009-09-16 | 济南海纳特科技有限公司 | Formaldehyde tester of wood-based plates by gas analyzing method |
| CN201477002U (en) * | 2009-09-08 | 2010-05-19 | 苏州伍得人造板设备有限公司 | Device for testing formaldehyde emission through pump suction method |
-
2012
- 2012-08-16 CN CN201210290264.6A patent/CN102798702B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570592A (en) * | 2004-05-11 | 2005-01-26 | 南京林业大学 | Pumping measurement method for formaldehyde release quantity of artificial board |
| CN201311379Y (en) * | 2008-12-15 | 2009-09-16 | 济南海纳特科技有限公司 | Formaldehyde tester of wood-based plates by gas analyzing method |
| CN201477002U (en) * | 2009-09-08 | 2010-05-19 | 苏州伍得人造板设备有限公司 | Device for testing formaldehyde emission through pump suction method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158374A (en) * | 2015-09-26 | 2015-12-16 | 南京林业大学 | VOC detecting device in hot-pressing process of wooden composite plate |
| CN110027079A (en) * | 2019-05-10 | 2019-07-19 | 中国林业科学研究院木材工业研究所 | Formaldehydogenic method is produced in a kind of absorption timber high-temperature drying procedures |
| CN110658347A (en) * | 2019-10-11 | 2020-01-07 | 天津市滨海新区塘沽滨海建筑工程质量检测中心有限公司 | Automatic formaldehyde detection equipment and formaldehyde detection method |
| CN111781195A (en) * | 2020-07-02 | 2020-10-16 | 东营市盛基环保工程有限公司 | Method for detecting formaldehyde emission in formaldehyde-free artificial board |
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| CN102798702B (en) | 2015-02-18 |
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Application publication date: 20121128 Assignee: Nanjing Collier Heating and Cooling Equipment Co.,Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000431 Denomination of invention: Artificial board formaldehyde emission testing device with air chamber temperature control system Granted publication date: 20150218 License type: Common License Record date: 20181225 Application publication date: 20121128 Assignee: Jiangsu Baihe Machinery Co.,Ltd. Assignor: Nanjing Forestry University Contract record no.: 2018320000429 Denomination of invention: Artificial board formaldehyde emission testing device with air chamber temperature control system Granted publication date: 20150218 License type: Common License Record date: 20181225 |
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Effective date of registration: 20191125 Address after: 210000 Lishui Economic Development Zone, Jiangsu, Nanjing Patentee after: Nanjing Liyu mechanical and electrical equipment manufacturing Co.,Ltd. Address before: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Patentee before: Nanjing Forestry University |
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