CN202837267U - Man-made formaldehyde emission testing device with chamber temperature control system - Google Patents
Man-made formaldehyde emission testing device with chamber temperature control system Download PDFInfo
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- CN202837267U CN202837267U CN 201220404188 CN201220404188U CN202837267U CN 202837267 U CN202837267 U CN 202837267U CN 201220404188 CN201220404188 CN 201220404188 CN 201220404188 U CN201220404188 U CN 201220404188U CN 202837267 U CN202837267 U CN 202837267U
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- absorbent device
- burst size
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Abstract
The utility model provides a man-made formaldehyde emission testing device with a chamber temperature control system. The man-made formaldehyde emission testing device with the chamber temperature control system comprises an air pipe, a water wash bottle, a drying vessel, a drying oven, a formaldehyde solution absorber, and a second formaldehyde solution absorber, wherein the air pipe is extended into the water wash bottle, an air outlet of the water wash bottle is connected with a membrane filter, an air outlet of the membrane filter is connected with an air inlet of the drying vessel, an air outlet of the drying vessel is extended into the drying oven through an air flow gauge, a test-piece box is arranged inside the drying oven, a test piece is arranged inside the test-piece box, the outer surface of the drying oven is provided with a hot water sleeve, an air outlet at the bottom of the drying oven is extended into the first formaldehyde solution absorber, an air outlet of the formaldehyde solution absorber is extended into the second formaldehyde solution absorber. The man-made formaldehyde emission testing device with the chamber temperature control system has the advantages that no secondary pollution is produced during the testing process, operating personnel and environment are not subjected to any harm, medicine amount needed during the testing process is smaller than that via perforator method, and therefore testing cost is saved, environment is protected, and practicability is improved.
Description
Technical field
The utility model relates to a kind of artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system, belong to formaldehyde and discharge technical field of measurement and test.
Background technology
What release was commonly used to the indoor decorating and refurnishing materials 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, the toluene of 600ml severe toxicity will be produced, useless toluene is difficult to process, and processing cost is high, easily causes time secondary environmental pollution.This toluene is a kind of colourless, liquid with special aromatic odor, and it has the 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 process 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 namely 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 composition that does not belong to free formaldehyde, also extracts and count burst size.This is the not science part of perforation extraction, and it is always higher so adopt perforation extraction measured result, and is inconsistent with reality.From the security of test, the used toluene solution toxicity of perforation extraction is larger, and accidents happened that probability is larger in test.In whole test, must someone keep an eye on to prevent that proving installation from revealing or suck-back occurs and cause the accident.
Summary of the invention
The utility model proposes a kind of artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system, be intended to overcome prior art and discharge existing defects 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 more fully formaldehyde; B, with heating water bath 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 the data acquisition and controlling of temperature, pressure and time, and the parameter values such as temperature, pressure and time carry out intelligent processing method, set up LCDs.
Technical solution of the present utility model: it is characterized in that comprising air hose, the washing bottle, drying basin, baking oven, the formaldehyde absorbent device, the formaldehyde absorbent device, wherein in the air hose access washing bottle, escape pipe and the membrane filter of washing bottle join, the escape pipe of membrane filter connects the draft tube of drying basin, the escape pipe of drying basin is by in the air flowmeter access baking oven, 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, in the escape pipe access formaldehyde absorbent device of baking oven bottom, the escape pipe access formaldehyde absorbent device of formaldehyde absorbent device.
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 to 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 namely is called burst size with what gas form volatilized.Therefore meet the wood-based plate actual operation requirements.
Description of drawings
Fig. 1 is the structural representation with 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 circulating 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
Contrast accompanying drawing 1, its structure is to comprise air hose 1, washing bottle 2, drying basin 4, baking oven 6, formaldehyde absorbent device 11, formaldehyde absorbent device 12, wherein in the air hose 1 access washing bottle 2, 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 escape pipe of drying basin 4 is by in the air flowmeter 5 access baking ovens 6, deposit test specimen case 7 in the baking oven 6, test specimen case 7 interior placement test specimens 8, the appearance of baking oven 6 is equipped with hot water jacket 9, hot water jacket 9 adjunction automatic circulating pumps, 10; In the escape pipe access formaldehyde absorbent device 11 of baking oven 6 bottoms, the escape pipe access formaldehyde absorbent device 12 of formaldehyde absorbent device 11.
Described formaldehyde absorbent device 12 joins by air pump 13 and waste gas 14 vent pipes.
Described hot water jacket 9 adjunction automatic circulating pumps 10.
The outlet of described air flowmeter 5 is by in the solenoid valve 15-1 access baking oven 6.
Described baking oven 6 bottom escape pipes access in the formaldehyde absorbent device 11 by solenoid valve 15-3.
The outlet of described air flowmeter 5 accesses in the test specimen case 7 by solenoid valve 15-2.
Described test specimen case 7 bottom escape pipes are by in the solenoid valve 15-4 access formaldehyde absorbent device 11.
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 then flowing through is being present in airborne oily substance or other impurity leaches.Pretreated air is removed moisture by drying basin 4 and is flowed through air flowmeter 5 meterings.Requiring air mass flow on the technique 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 by air pump 13.
By particieboard and middle and higher density fiberboard and the Kenya's medium density fibre board (MDF) of selecting Dare's artificial liner enterprise to produce.(detect according to GB18580-2001 national standard, content of formaldehyde is selected E to select different plate kinds (particieboard and middle and higher density fiberboard), different thickness of slab, different content of formaldehyde
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.The same plate is 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 altogether 28 groups of tests (every group of test repeats twice, averages), 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, having more satisfactory conversion relation: y=9.235x-1.0654(y between the two is the perforation value; 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 are obviously different in the principle existence, and namely 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 then will be dissolved with formaldehyde carries out liquid-liquid extraction by perforator and water, and formaldehyde is turned 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 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 adopting the perforation extraction to have contaminated environment and human body had the weak point such as harm, thereby, when usual work check, do not need to do the perforation extraction, can test with suction method the formaldehyde release value of wood-based plate, calculate corresponding perforation value according to regression equation, can estimate accordingly to calculate the content of formaldehyde in the test specimen, pollute and the reduction cost thereby reduce most possibly.
Under the effect of air pump suction, air filters through the air purge bottle, and the formaldehyde that may exist in the air is dissolved in the distilled water; Then the air after filtering continues by membrane filter the contaminant filters such as airborne greasy dirt to be fallen; And then through the instrument air dryer bottle, dried air is entering lower test specimen case;
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, automatically change gas in the flow direction of test specimen case by solenoid valve, and by air flowmeter control air velocity.
Adopt respectively temperature control to adopt that PID regulates, pressure transducer, 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 the data acquisition and controlling of temperature, pressure and time, and the parameter values such as temperature, pressure and time carry out intelligent processing method, and the operation information of equipment is presented on the touch-screen, the convenient observation; Centre panel is the air chamber of independently working, and sample is put into this air chamber on request, and then the door with air chamber shuts, enter the test acquisition state, can see bubble in the sampling bottle, preset the gas production time and the sampling bottle timesharing is connected, sampling continues automatically to adjust in 6 hours original state;
Gas production bottle group is placed on the carriage of sampling bottle, and carriage adopts the slip track, can return to reduce in the time of obsolete to take up room; The right side is the hermatic door of air chamber, unclamps the middle annular knurl handwheel of the horizontal Beam of hermatic door, can open the hermatic door of air chamber to the horizontal Beam of upper right rotation, places or take out sample; There is the filler side, in order to toward tank water filling and replacing filtering material, should guarantee that enough water is arranged in the water tank in the time of the equipment operation;
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 respectively 50ml distilled water, and two one group, flexible pipe connects, and is placed on the carriage, and connects with the instrument gas outlet.
Claims (7)
1. with the artificial board formaldehyde burst size proving installation of air chamber temperature adjusting system, it is characterized in that comprising air hose, the washing bottle, drying basin, baking oven, the formaldehyde absorbent device, the formaldehyde absorbent device, wherein in the air hose access washing bottle, escape pipe and the membrane filter of washing bottle join, the escape pipe of membrane filter connects the draft tube of drying basin, the escape pipe of drying basin is by in the air flowmeter access baking oven, 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, in the escape pipe access formaldehyde absorbent device of baking oven bottom, the escape pipe access formaldehyde absorbent device of formaldehyde absorbent device.
2. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that the formaldehyde absorbent device joins by air pump and exhaust emission tube.
3. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that hot water jacket adjunction automatic circulating pump.
4. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that the outlet of described air flowmeter is by in the first solenoid valve access baking oven.
5. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that described baking oven bottom escape pipe accesses in the formaldehyde absorbent device by the 3rd solenoid valve.
6. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that the outlet of air flowmeter accesses in the test specimen case by the second solenoid valve.
7. the artificial board formaldehyde burst size proving installation with air chamber temperature adjusting system according to claim 1 is characterized in that described test specimen case bottom escape pipe is by in the 4th solenoid valve access formaldehyde absorbent device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220404188 CN202837267U (en) | 2012-08-16 | 2012-08-16 | Man-made formaldehyde emission testing device with chamber temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220404188 CN202837267U (en) | 2012-08-16 | 2012-08-16 | Man-made formaldehyde emission testing device with chamber temperature control system |
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| CN202837267U true CN202837267U (en) | 2013-03-27 |
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ID=47948946
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| CN 201220404188 Expired - Lifetime CN202837267U (en) | 2012-08-16 | 2012-08-16 | Man-made formaldehyde emission testing device with chamber temperature control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529172A (en) * | 2013-10-24 | 2014-01-22 | 杨奠基 | Method and device for demonstrating formaldehyde release amount of decorative materials in stores and device thereof |
| 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 |
-
2012
- 2012-08-16 CN CN 201220404188 patent/CN202837267U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529172A (en) * | 2013-10-24 | 2014-01-22 | 杨奠基 | Method and device for demonstrating formaldehyde release amount of decorative materials in stores and device thereof |
| 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 |
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| GR01 | Patent grant | ||
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Granted publication date: 20130327 |