CN109540820A - A method of prediction ornament materials Form aldehyde release concentration under the conditions of different humidity - Google Patents
A method of prediction ornament materials Form aldehyde release concentration under the conditions of different humidity Download PDFInfo
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Abstract
The present invention relates to technical field of buildings, and disclose a kind of method for predicting ornament materials Form aldehyde release concentration under the conditions of different humidity, by having concentration of formaldehyde data, carry out humidity coefficient fitting according to formula (7)；To the material for being envisaged for interior decoration, i.e., Form aldehyde release measurement of concetration is carried out by spectrophotometry etc. to the material being placed in environment storehouse, record 24 hour datas, while recording the humidity data in environment storehouse in measurement process；The concentration changes with time curve that measures is drawn, according to the exponential law of formula (5), is fitted to obtain by data and distributes coefficient k and limting concentration C0；Again by load-carry duty L, predicted time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, predictor formula (7) is substituted into realize based on the building decoration materials Form aldehyde release concentration measurement under a certain damp condition and predicts Form aldehyde release concentration of the material under other damp conditions.
Description
Technical field
The present invention relates to technical field of buildings, specially a kind of prediction ornament materials Form aldehyde release under the conditions of different humidity
The method of concentration.
Background technique
Formaldehyde pollution is very universal in civil buildings, and many decoration materials can all be discharged to be discharged to ambient enviroment
The symptoms such as formaldehyde causes various ill symptoms, such as dizzy out of strength, and skin is itched；Furnishing fields indoors, after finishing
Burst size of methanal of the ornament materials that the control of indoor formaldehyde concentration is mainly used by measurement under a certain environmental condition, it
The indoor formaldehyde concentration after finishing is considered using the methods of concentration of formaldehyde superposition afterwards；However, it is both domestic and external a large number of studies show that, build
The concentration of formaldehyde rate of release of material is built under different indoor environmental conditions, difference is huge；In these environmental factors, humidity is
One of most important factor；For example, the medial humidity difference of south China and the north, can make concentration of formaldehyde increase at double or
It reduces.
Therefore, the past measurement of concetration based on single humidity is not able to satisfy, the diversity under indoor conditions actual conditions,
It estimates the indoor formaldehyde harm after may seriously underestimating finishing in adverse conditions, cannot be in time adjustment dress before finishing
Decorations scheme and selection provide accurate foundation.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of prediction ornament materials, formaldehyde is released under the conditions of different humidity
The method for putting concentration has based on the building decoration materials Form aldehyde release concentration measurement under a certain damp condition, predicts the material
The advantages of expecting the Form aldehyde release concentration under other damp conditions, solving the past measurement of concetration based on single humidity cannot
Meet, the diversity under indoor conditions actual conditions estimates the interior after may seriously underestimating finishing in adverse conditions
Formaldehyde harm cannot adjust the problem of decoration scheme and selection provide accurate foundation in time before finishing.
(2) technical solution
To realize the above-mentioned building decoration materials Form aldehyde release concentration measurement based under a certain damp condition, the material is predicted
Expect the purpose of the Form aldehyde release concentration under other damp conditions, the invention provides the following technical scheme:
A method of prediction ornament materials Form aldehyde release concentration under the conditions of different humidity, including following implemented principle:
(i) determine that pollutant changes over time rule
Firstly, introducing material rate of release SER, ventilation rate n, the change rate expression of pollutant concentration C (t) are considered are as follows:
DC/dt=L SER (t)-nC (t)
It can be seen that ventilation can reduce indoor pollutant and advance the speed, in order to improve safety coefficient, too conservative consideration,
It is assumed that the interior space is completely closed, i.e. n=0 then has
SER (t)=dC/dt/L (1)
Consider emission rate and material internal surface contaminant concentration, i.e. limting concentration C*And surrounding space pollutant concentration C
Difference it is directly proportional,
SER (t)=k (C*-C) (2)
K is to distribute coefficient in formula, eliminates SER and obtains
DC/dt/L=k (C*-C) (3)
Integral arranges
Kt=ln (C*/(C*-C)) (4)
Obtain concentration changes with time rule
C=C*(1-e-kLt) (5)
(ii) determine pollutant limting concentration with humidity changing rule
When the humidity in actual environment is different from humidity when measurement, the limting concentration in actual environment also will be different,
Value and humidity RH when measurement0, humidity RH in actual environment, the limting concentration obtained with measurement is related
C*=f (RH, RH0, C0) (6)
This method passes through the measurement of concetration and available data of multiple material, finds for different materials, concentration of formaldehyde
There are similarity rules with humidity variation, and formula (6) are substituted into formula (5), obtain concentration with humidity variation relation:
C=f (RH, L, t)=C0×(1+RRH×(RH-RH0))(1-e-kLt) (7)
In formula, C is prediction concentration of formaldehyde, unit mg/m3；RH is relative humidity；C0For the formaldehyde limit under standard state
Concentration, unit mg/m3；RH0For standard state relative humidity；RRHFor humidity coefficient.Linear regression shows good consistent
Property, related coefficient is respectively 0.94.
(iii) stalk measured under material standard state puts concentration
The ornament materials Form aldehyde release concentration under measurement standard state is measured according to national standards, i.e., to being placed in environment storehouse
Material Form aldehyde release measurement of concetration is carried out by spectrophotometry etc., record 24 hour datas, intra-record slack byte is with time of measuring
Gradually extend, and records the humidity number pick in environment storehouse in measurement process.
It is fitted and is dissipated by data according to the exponential law of formula (5) according to the concentration changes with time curve measured
Send out coefficient k and limting concentration C0。
(iv) release concentration under target material predicted state is predicted
By load-carry duty L, time t, limting concentration C0, and distribute coefficient k and substitute into formula (7), pre- measuring moisture can be calculated
Under Form aldehyde release concentration.Significantly, since rate of venting n=0, i.e. not being vented for pollutant are diluted, we
The concentration of formaldehyde that method predicts is relatively conservative and safe.
A kind of method for predicting ornament materials Form aldehyde release concentration under the conditions of different humidity is proposed in the present invention, including
Following steps:
Step 1: according to existing concentration of formaldehyde data, root digs formula (7) and carries out humidity coefficient fitting；
Step 2: to the material for being envisaged for interior decoration, the Form aldehyde release under measurement standard state is dense according to national standards
Degree carries out Form aldehyde release measurement of concetration by spectrophotometry etc. to the material being placed in environment storehouse, records 24 hour datas,
The humidity data in environment storehouse in measurement process is recorded simultaneously；
Step 3: the concentration changes with time curve that plot step 2 measures passes through number according to the exponential law of formula (5)
It obtains distributing coefficient k and limting concentration C according to fitting0；
Step 4: by load-carry duty L, predicted time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, it is public to substitute into prediction
Formula (7) acquires material Form aldehyde release concentration under the conditions of predicting indoor humidity, completes prediction.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of prediction ornament materials, Form aldehyde release is dense under the conditions of different humidity
The method of degree, have it is following the utility model has the advantages that
1, the method for prediction ornament materials Form aldehyde release concentration under the conditions of different humidity, by having concentration of formaldehyde number
According to according to formula (7) progress humidity coefficient fitting；To the material for being envisaged for interior decoration, measurement standard state according to national standards
Under Form aldehyde release concentration, i.e., Form aldehyde release measurement of concetration is carried out by spectrophotometry etc. to the material being placed in environment storehouse,
24 hour datas are recorded, while recording the humidity data in environment storehouse in measurement process；It is bent to draw the concentration changes with time measured
Line is fitted to obtain and distributes coefficient k and limting concentration C according to the exponential law of formula (5) by data0；Again by load-carry duty L, in advance
Survey time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, is substituted into predictor formula (7), is acquired in prediction indoor humidity item
Material Form aldehyde release concentration under part completes prediction, to realize based on the building decoration materials first under a certain damp condition
Aldehyde release concentration measured value predicts Form aldehyde release concentration of the material under other damp conditions.
2, achievement of the invention is by the way that under different humidity state, 24 hours of ornament materials Form aldehyde release concentration are measured,
And with the present invention is based on the concentration of formaldehyde results predicted under standard humidity to be compared, discovery predicted value and measured value ten tap
Closely, it was demonstrated that this method has very high accuracy and reliability.The maximum disparity of standard state and dbjective state reaches
30% or more, it is shown that when indoor living environment changes, and humidity is with measuring state difference, the Form aldehyde release of building decoration materials
Huge change can occur for concentration, carry out actual conditions prediction by this method, can be to avoid the huge difference of measured value predicted value
It is different, it both avoids underestimating the concentration of formaldehyde after finishing, has an adverse effect to residents ' health, also avoid over-evaluating concentration of formaldehyde, cause
Waste in cost caused by design for change or material embodies the practicability of this method.
Detailed description of the invention
Fig. 1 is that humidity coefficient of the present invention is fitted schematic diagram；
Fig. 2 is that concentration of formaldehyde of the present invention changes over time curve synoptic diagram.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
A method of prediction ornament materials Form aldehyde release concentration under the conditions of different humidity, including following implemented principle:
(i) determine that pollutant changes over time rule
Firstly, introducing material rate of release SER, ventilation rate n, the change rate expression of pollutant concentration C (t) are considered are as follows:
DC/dt=L SER (t)-nC (t)
It can be seen that ventilation can reduce indoor pollutant and advance the speed, in order to improve safety coefficient, too conservative consideration,
It is assumed that the interior space is completely closed, i.e. n=0 then has
SER (t)=dC/dt/L (1)
Consider emission rate and material internal surface contaminant concentration, i.e. limting concentration C*And surrounding space pollutant concentration C
Difference it is directly proportional,
SER (t)=k (C*-C) (2)
K is to distribute coefficient in formula, eliminates SER and obtains
DC/dt/L=k (C*-C) (3)
Integral arranges
Kt=ln (C*/(C*-C)) (4)
Obtain concentration changes with time rule
C=C*(1-e-kLt) (5)
(ii) determine pollutant limting concentration with humidity changing rule
When the humidity in actual environment is different from humidity when measurement, the limting concentration in actual environment also will be different,
Value and humidity RH when measurement0, humidity RH in actual environment, the limting concentration obtained with measurement is related
C*=f (RH, RH0, C0) (6)
This method passes through the measurement of concetration and available data of multiple material, finds for different materials, concentration of formaldehyde
There are similarity rules with humidity variation, and formula (6) are substituted into formula (5), obtain concentration with humidity variation relation:
C=f (RH, L, t)=C0×(1+RRH×(RH-RH0))(1-e-kLt) (7)
In formula, C is prediction concentration of formaldehyde, unit mg/m3；RH is relative humidity；C0For the formaldehyde limit under standard state
Concentration, unit mg/m3；RH0For standard state relative humidity；RRHFor humidity coefficient.Linear regression shows good consistent
Property, related coefficient is respectively 0.94, sees Fig. 1.
(iii) release concentration under material standard state is measured
The ornament materials Form aldehyde release concentration under measurement standard state is measured according to national standards, i.e., to being placed in environment storehouse
Material Form aldehyde release measurement of concetration is carried out by spectrophotometry etc., record 24 hour datas, intra-record slack byte is with time of measuring
Gradually extend, and records the humidity data in environment storehouse in measurement process.
It is fitted and is dissipated by data according to the exponential law of formula (5) according to the concentration changes with time curve measured
Send out coefficient k and limting concentration C0, see Fig. 2.
(iv) release concentration under target material predicted state is predicted
By load-carry duty L, time t, limting concentration C0, and distribute coefficient k and substitute into formula (7), pre- measuring moisture can be calculated
Under Form aldehyde release concentration.Significantly, since rate of venting n=0, i.e. not being vented for pollutant are diluted, we
The concentration of formaldehyde that method predicts is relatively conservative and safe.
The present invention separately provides a kind of method for predicting ornament materials Form aldehyde release concentration under the conditions of different humidity, including
Following steps:
Step 1: according to existing concentration of formaldehyde data, carrying out humidity coefficient fitting according to formula (7)；
Step 2: to the material for being envisaged for interior decoration, the Form aldehyde release under measurement standard state is dense according to national standards
Degree carries out Form aldehyde release measurement of concetration by spectrophotometry etc. to the material being placed in environment storehouse, records 24 hour datas,
The humidity data in environment storehouse in measurement process is recorded simultaneously；
Step 3: the concentration changes with time curve that plot step 2 measures passes through number according to the exponential law of formula (5)
It obtains distributing coefficient k and limting concentration C according to fitting0；
Step 4: by load-carry duty L, predicted time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, it is public to substitute into prediction
Formula (7) acquires material Form aldehyde release concentration under the conditions of predicting indoor humidity, completes prediction.
Experimental example:
The present invention solves the material Form aldehyde release concentration measured under single damp condition and works as humidity in the actual environment
Under the conditions of condition and measuring condition have differences, the problem applied.
Effect is put to the proof: predicting the Form aldehyde release concentration of flame-retardant plywood used in certain hard-cover project using this method.
It is 55% that the project, which estimates relative humidity,.
This method implementation process in the project is as follows:
(1) it is quasi- to carry out humidity coefficient according to formula (7) for the data accumulation tested by its previous materials concentration of formaldehyde environment storehouse
It closes；
(2) bought the flame-retardant plywood being intended that from supply of material producer first, except unlap and surface simply clear up with
Afterwards, merging environment storehouse carries out closed measurement in 24 hours.Respectively 20 minutes, 40 minutes, 60 minutes, 80 minutes, 100 minutes, 120
Minute, 3 hours, 4 hours, 7 hours, 24 hours carry out sample collection to the air in environment storehouse, and have recorded the wet of the period
Degree.And concentration of formaldehyde measurement has been carried out using spectrophotometry according to national standards；
(3) the concentration changes with time curve measured is drawn to be fitted according to the exponential law of formula (5) by data
To distributing coefficient k and limting concentration C0；
(4) by load-carry duty L, predicted time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, predictor formula is substituted into
(7), material Form aldehyde release concentration under the conditions of predicting indoor humidity is acquired, prediction is completed.
In order to verify the reliability of this method, to the batch flame-retardant board under dbjective state using identical measurement method into
Measurement is gone.It is very close by comparing discovery predicted value and measured value, it is shown that this method has very high reliability.Standard
The maximum disparity of state and dbjective state has reached 30% or more, it is shown that when indoor living environment change, humidity and measurement shape
When state difference, huge change can occur for the Form aldehyde release concentration of building decoration materials, and it is pre- to carry out actual conditions by this method
It surveys, can both avoid underestimating the concentration of formaldehyde after finishing, residents ' health is generated not to avoid the greatest differences of measured value predicted value
Benefit influences, and also avoids over-evaluating concentration of formaldehyde, causes the waste in cost caused by design for change or material, embody this method
Practicability.
The working principle of the invention is: by having concentration of formaldehyde data, root digs formula (7) and carries out humidity coefficient fitting；It is right
It is envisaged for the material of interior decoration, according to national standards the Form aldehyde release concentration under measurement standard state, i.e., to being placed in environment storehouse
In material Form aldehyde release measurement of concetration is carried out by spectrophotometry etc., record 24 hour datas, while recording measurement process
The humidity data in middle environment storehouse；It draws the concentration changes with time curve measured and number is passed through according to the exponential law of formula (5)
It obtains distributing coefficient k and limting concentration C according to fitting0；Again by load-carry duty L, predicted time t, limting concentration C0, distribute coefficient k and pre-
Measuring moisture RH is substituted into predictor formula (7), acquires material Form aldehyde release concentration under the conditions of predicting indoor humidity, completes prediction,
To realize based on the building decoration materials Form aldehyde release concentration measurement under a certain damp condition, predict the material other
Form aldehyde release concentration under damp condition.
Typical case:
Case one: it is exactly to be led to using method of the invention that China Oil and Food Import and Export Corporation day, which pleases No. one project South house batch fine fitment project,
It crosses this method and carries out actual conditions prediction, can be led to avoid the huge difference of measured value predicted value, both avoided underestimating the first after finishing
Aldehyde concentration has an adverse effect to residents ' health, also avoids over-evaluating concentration of formaldehyde, causes cost caused by design for change or material
On waste.
Two: Guang Tian group's high-tech assembling model room of case is also to be carried out by this method real using method of the invention
The prediction of border situation, can open to avoid the huge difference of measured value predicted value, both avoid underestimating the concentration of formaldehyde after finishing, strong to resident
Health has an adverse effect, and also avoids over-evaluating concentration of formaldehyde.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (2)
1. a kind of method for predicting ornament materials Form aldehyde release concentration under the conditions of different humidity, which is characterized in that including following
Realization principle:
(i) determine that pollutant changes over time rule
Firstly, introducing material rate of release SER, ventilation rate n, the change rate expression of pollutant concentration C (t) are considered are as follows:
DC/dt=L SER (t)-nC (t)
It can be seen that ventilation can reduce indoor pollutant and advance the speed, in order to improve safety coefficient, too conservative consideration, it is assumed that
The interior space is completely closed, i.e. n=0, then is had
SER (t)=dC/dt/L (1)
Consider emission rate and material internal surface contaminant concentration, the i.e. difference of limting concentration C* and surrounding space pollutant concentration C
It is directly proportional,
SER (t)=k (C*-C) (2)
K is to distribute coefficient in formula, eliminates SER and obtains
DC/dt/L=k (C*-C) (3)
Integral arranges
Kt=ln (C*/(C*-C)) (4)
Obtain concentration changes with time rule
C=C*(1-e-kLt) (5)
(ii) determine pollutant limting concentration with humidity changing rule
When the humidity in actual environment is different from humidity when measurement, the limting concentration in actual environment also will be different, value with
Humidity RH when measurement0, humidity RH in actual environment, the limting concentration obtained with measurement is related,
C*=f (RH, RH0, C0) (6)
This method passes through the measurement of concetration and available data of multiple material, it is found that concentration of formaldehyde is with wet for different materials
Degree variation has similarity rules, and formula (6) are substituted into formula (5), obtains concentration with humidity variation relation:
C=f (RH, L, t)=C0×(1+RRH×(RH-RH0))(1-e-kLt) (7)
In formula, C is prediction concentration of formaldehyde, unit mg/m3；RH is relative humidity；C0It is dense for the formaldehyde limit under standard state
Degree, unit mg/m3；RH0For standard state relative humidity；RRHFor humidity coefficient.Linear regression shows good consistency,
Related coefficient is respectively 0.94.
(iii) release concentration under material standard state is measured
The ornament materials Form aldehyde release concentration under measurement standard state is measured according to national standards, i.e., to the material being placed in environment storehouse
Material carries out Form aldehyde release measurement of concetration by spectrophotometry etc., records 24 hour datas, intra-record slack byte with time of measuring gradually
Extend, and records the humidity data in environment storehouse in measurement process.
According to the concentration changes with time curve measured, according to the exponential law of formula (5), it is fitted to obtain to distribute by data and is
Number k and limting concentration C0。
(iv) release concentration under target material predicted state is predicted
By load-carry duty L, time t, limting concentration C0, and distribute coefficient k and substitute into formula (7), the first under pre- measuring moisture can be calculated
Aldehyde release concentration.Significantly, since rate of venting n=0, i.e. not being vented for pollutant are diluted, this method prediction
Concentration of formaldehyde out is relatively conservative and safe.
2. a kind of method for predicting ornament materials Form aldehyde release concentration under the conditions of different humidity, which is characterized in that including following
Step:
Step 1: according to existing concentration of formaldehyde data, carrying out humidity coefficient fitting according to formula (7)；
Step 2: to the material for being envisaged for interior decoration, the Form aldehyde release concentration under measurement standard state according to national standards, i.e.,
Form aldehyde release measurement of concetration is carried out by spectrophotometry etc. to the material being placed in environment storehouse, records 24 hour datas, simultaneously
Record the humidity data in environment storehouse in measurement process；
Step 3: the concentration changes with time curve that plot step 2 measures, it is quasi- by number pick according to the exponential law of formula (5)
Conjunction obtains distributing coefficient k and limting concentration C0；
Step 4: by load-carry duty L, predicted time t, limting concentration C0, coefficient k and pre- measuring moisture RH are distributed, predictor formula is substituted into
(7), material Form aldehyde release concentration under the conditions of predicting indoor humidity is acquired, prediction is completed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111790258A (en) * | 2020-07-02 | 2020-10-20 | 南京安荃屋环保科技有限公司 | Environment-friendly formaldehyde scavenging solution and preparation method and use method thereof |
| CN111859595A (en) * | 2019-04-16 | 2020-10-30 | 左益玮 | Indoor decoration formaldehyde concentration and attenuation prediction method based on multi-component multi-parameter dynamic model |
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| CN106405020A (en) * | 2016-11-24 | 2017-02-15 | 中国建筑材料科学研究总院 | Material formaldehyde emission rate limit load rate test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111859595A (en) * | 2019-04-16 | 2020-10-30 | 左益玮 | Indoor decoration formaldehyde concentration and attenuation prediction method based on multi-component multi-parameter dynamic model |
| CN111859595B (en) * | 2019-04-16 | 2024-04-26 | 左益玮 | Indoor decoration formaldehyde concentration and attenuation prediction method based on multicomponent multiparameter dynamic model |
| CN111790258A (en) * | 2020-07-02 | 2020-10-20 | 南京安荃屋环保科技有限公司 | Environment-friendly formaldehyde scavenging solution and preparation method and use method thereof |
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