CN204116063U - A kind of gaseous organic pollutant generator for air strainer test macro - Google Patents
A kind of gaseous organic pollutant generator for air strainer test macro Download PDFInfo
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- CN204116063U CN204116063U CN201420431089.2U CN201420431089U CN204116063U CN 204116063 U CN204116063 U CN 204116063U CN 201420431089 U CN201420431089 U CN 201420431089U CN 204116063 U CN204116063 U CN 204116063U
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- vaporization chamber
- air
- test macro
- organic pollutant
- gaseous organic
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Abstract
The utility model discloses a kind of gaseous organic pollutant generator for air strainer test macro, it comprises liquid container, liquid container outlet is connected with constant flow pump inlet by liquid line, the liquid outlet of constant flow pump is connected with the fluid contaminants entrance of vaporization chamber by liquor charging pipeline, the air intake of suspended body flowmeter and compressed air communication, the air out of suspended body flowmeter is connected by air line with the compressed air inlet of vaporization chamber, thermopair is inserted with in vaporization chamber, thermopair and solid-state relay are connected with temperature controller respectively by wire, vaporization chamber is U-shaped structure, and a side roof part of U-shaped structure is provided with horizontal curved trisection, compressed air inlet is arranged on horizontal curved trisection inflow point, fluid contaminants entrance is multiple and is arranged in horizontal curved trisection, the vertical port of opposite side of U-shaped structure exports as gaseous contaminant.Adopt this device to adapt to the change of fluid contaminants flow, ensure that the gasification of liquid.
Description
Technical field
The utility model relates to the generator of multiple gaseous chemical pollutant, and the utility model particularly relates to the gaseous contaminant generating means for air strainer Performance Detection.
Background technology
Along with developing rapidly of China's economy, China's automobile pollution increases sharply.At the end of cut-off 2011, China individual has vehicle and amounts to 7326.77 ten thousand, is 7.5 times more than in 2002, increases over 10 years with the annual compound growth rate of 25%.When the pollutant of motor vehicle emission becomes the problem of people's growing interest, environment inside car also more and more causes the concern of the public.Play standard GB/T/T27630-2011 " in passenger car Air Quality Evaluation guide " in March, 2012 to come into effect, define in this standard benzene in air (≤0.11mg/m in car
3), toluene (≤1.10mg/m
3), dimethylbenzene (≤1.50mg/m
3), ethylbenzene (≤1.50mg/m
3), styrene (≤0.26mg/m
3), formaldehyde (≤0.10mg/m
3), acetaldehyde (≤0.05mg/m
3), acryl aldehyde (≤0.05mg/m
3) concentration requirement.In building, the harm of gaseous contaminant is a very important problem especially.In GB XXXX, clear stipulaties formaldehyde, the concentration limit of the multiple pollutants such as toluene.
Gaseous contaminant in Automobile mainly contains CO, CO
2, NO
2, NH
3, and the volatile organic matter such as benzene homologues and formaldehyde.According to statistics, in modern society, the time that people stop in the vehicles accounts for 5%, is only second in the indoor residence time.The harm of in-vehicle exposure to health is more and more obvious.These pollutant parts distributing from upholstery material, a part is from automobile external environment, and especially in rush-hour, the tail gas of other vehicular discharges of road can have a strong impact on the air quality in car.Gaseous contaminant is huge to harm, and for benzene homologues, benzene is strong carcinogen, can at liver and marrow intracellular metabolite, and Long Term Contact can cause marrow and genetic damage; Toluene can stimulate respiratory tract and eyes, symptoms such as causing nausea, have a headache, be uncomfortable in chest, and the long-term toluene that sucks can cause the symptoms such as neurasthenia; Dimethylbenzene can enter human body through respiratory tract and skin, can suppress nervous centralis, and excessive or Long Term Contact can cause ataxia, the off one's dot behaviors such as sense organ entanglement and hypomnesia, also there is pungency simultaneously, eyes can be caused dry and astringent, the uncomfortable symptoms such as cough.
All filter cleaner is housed in current most of automobile ventilation system, filter the air sent in car, the filtration efficiency of automobile filter, directly can have influence on the quality of air in car.China automobile industry standard QC/T795.2-2007 takes advantage of road vehicle and drives room air cleaner gas filtration test and give relevant criterion.In this standard, define the detection method of filter cleaner to gaseous contaminant removal efficiency in air, detecting a kind of gaseous contaminant that must use is toluene.Specify in standard, the required gaseous state toluene concentration of test is 80 ± 8ppm, and in test process, pollutant generation concentration deviation is ± 3%.Calculate, filter test table in filter cleaner test macro, it is 100-800m that air quantity is filtered in test
3during/h, toluene consumption is 0.58-4.67g/min.General bubbler, can only produce the gaseous state toluene of several milligrams to tens milligrams, can not meet the demands far away; And with the gaseous state toluene that calibrating gas bottle provides, then consume huge, uneconomical, and frequent standard of replacement gas cylinder is very numerous and diverse.Therefore, traditional gaseous state toluene production method can not be automobile filter test board, and the test macro of the more gaseous state toluene of similar needs is stablized, continued to provide gaseous state toluene, need a kind of economical, convenient, and can stablize, continue to provide the generating means of enough gaseous state toluene.If be detected the filtration efficiency of filter to other benzene homologues (as benzene or dimethylbenzene), under close test air quantity and pollutant levels, consumption and the toluene consumption of benzene and dimethylbenzene are close, per minutely the fluid contaminants of several grams is about needed to be gasified totally, could meet the requirement that enough gas target contaminants occur, and this is that traditional bubbler or calibrating gas bottle plenum system are unappeasable.
In patent ZL201320529834.2, have employed constant flow pump and control fluid contaminants flow, then with air atomizer spray nozzle, fluid contaminants is atomized, then adopt the heating of silica gel heating band, make the fluid contaminants vaporization after atomization.When using air atomizer spray nozzle, the atomizing effect of nozzle has certain requirement to air mass flow and fluid flow, and be also not suitable for the liquid that viscosity is larger, therefore the scope of application is narrower.Adopt the method for air atomizer spray nozzle atomization, fluid contaminants is sprayed into cylinder type vaporization chamber.When using atomizer, because must there be certain internal diameter in nozzle interior liquid duct, can not be too thin, thus cause when fluid flow is less, the pulsation phenomenon that there will be off and on of spraying, the stability that impact occurs.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art, provides a kind of and can provide the gaseous organic pollutant generator for air strainer test macro of the gaseous contaminant meeting international standard for air cleaner test macro.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of gaseous organic pollutant generator for air strainer test macro of the present utility model, it comprises liquid container, described liquid container outlet is connected with constant flow pump inlet by liquid line, the liquid outlet of described constant flow pump is connected with the fluid contaminants entrance of vaporization chamber by liquor charging pipeline, the air intake of suspended body flowmeter and compressed air communication, the air out of suspended body flowmeter is connected by air line with the compressed air inlet of vaporization chamber, electrical heating wire is provided with outside described vaporization chamber, heat-insulation layer is provided with in electrical heating wire outside, electrical heating wire is connected with solid-state relay by heater switch, thermopair is inserted with in described vaporization chamber, described thermopair and solid-state relay are connected with temperature controller respectively by wire, described vaporization chamber is U-shaped structure, and a side roof part of U-shaped structure is provided with horizontal curved trisection, described compressed air inlet is arranged on horizontal curved trisection inflow point, described fluid contaminants entrance is multiple and is arranged in horizontal curved trisection, the outlet end of liquor charging pipeline is communicated with multiple fluid contaminants entrance respectively by arm, the vertical port of opposite side of described U-shaped structure exports as gaseous contaminant.
The beneficial effects of the utility model are:
1. adopt air atomizer spray nozzle to be atomized liquid in patent ZL201320529834.2, when fluid flow is larger, need larger air mass flow, thus cause the residence time of vaporization chamber to shorten, the pollutant gasification after impact.Because the internal diameter of liquid inlet different branch is different from angle, when fluid flow is less, liquid, preferentially by the branch road in centre position, ensures that liquid still enters vaporization chamber with fluidised form, and there will not be the situation drop by drop instilling vaporization chamber.When fluid flow is larger, U-shaped vaporization chamber is that fluid contaminants provides the sufficient residence time, ensure that the gasification of liquid.Meanwhile, owing to not re-using atomizer, compressed-air actuated pressure requirements is tailed off, only need ensure the stability of compressed air require.
2. the polytetrafluoroethylcontainer container lid with retaining valve is housed on the liquid container holding fluid contaminants, had both ensured that constant flow pump can siphon away pollutant smoothly from solution bottle, and can not pollute because of the evaporation of pollutant again.
3. the operational throughput of fluid contaminants accurately can be controlled by constant flow pump, thus the generating capacity of accurate gaseous pollutant, meet the requirement in standard.This utility model belongs to ACTIVE CONTROL for the control of pollutant generating capacity, according to required condition calculating, control the generating capacity that constant flow pump amount of infusion gets final product control polluted articles, compared with feedback regulation, a large amount of debug times can be saved, can change the concentration of pollutant in test easily and fast, applicable working condition is extensive simultaneously.
4. the preferred quartz glass of vaporization chamber makes.Glass processing is convenient, is beneficial to the compact of vaporization chamber structure.Glass is corrosion-resistant, and after can avoiding long-time use, vaporization chamber itself produces impurity and pollutes target contaminant.In addition, transparent quartz glass, can ensure that vaporization chamber is well visual, is convenient to the gasification situation at experimental phase direct vision liquid, is convenient to regulate the parameter such as heating-up temperature, air quantity to ensure the stability that pollutant occurs and accuracy.
5. this device according to different pollutants, can set different heating-up temperatures, has both ensured that fluid contaminants is thoroughly vaporized, and ensures generating capacity, avoids temperature too high simultaneously, cause pollutant generation chemical change.
6. the liquid line of constant flow pump adopts the flexible pipe that can not produce adsorbing fluororubber to organism and water, the common pump line of constant flow pump is silica gel, meeting adsorb organic compound, the fluid flow out of true causing constant flow pump to transport, so employing is to produce adsorbing fluororubber flexible pipe.Constant flow pump must adopt flexible pipe normally to work in addition.Liquid line and liquor charging pipeline adopt polyfluortetraethylene pipe, all can not produce the component of target contaminant and generating capacity and disturb, and ensure quality occurs.
7. this gaseous contaminant generator, principle is simple, with low cost, and is applicable to multiplely to be evaporated by liquid, and the pollutant of gas occurs, economical and practical.
8. adopt this device can provide the gaseous contaminant meeting international standard (ISO/TS11155-2 " Roadvehicles-Airfilters for passenger compartments-Part2:Test for gaseous filtration "), also may be used for the generation of the similar pollutant of other character simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of gaseous organic pollutant generator principle schematic for air strainer test macro of the utility model;
Fig. 2 is the schematic diagram of the vaporization chamber of the generator shown in the utility model Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The utility model is the improvement on existing patent ZL201320529834.2.
A kind of gaseous organic pollutant generator for air strainer test macro of the present utility model as shown in drawings, it comprises liquid container 3, described liquid container outlet is connected with constant flow pump 4 inlet by liquid line, the liquid outlet of described constant flow pump is connected with the fluid contaminants entrance 11 of vaporization chamber 6 by liquor charging pipeline, the air intake 1 of suspended body flowmeter 2 and compressed air communication, the air out of suspended body flowmeter is connected by air line with the compressed air inlet 15 of vaporization chamber 6, electrical heating wire 7 is provided with outside described vaporization chamber 6, heat-insulation layer is provided with in electrical heating wire outside, electrical heating wire is connected with solid-state relay 10 by heater switch 14, thermopair 9 is inserted with in described vaporization chamber 6, described thermopair and solid-state relay are connected with temperature controller 8 respectively by wire, described vaporization chamber 6 is U-shaped structure, and a side roof part of U-shaped structure is provided with horizontal curved trisection, described compressed air inlet is arranged on horizontal curved trisection inflow point, described fluid contaminants entrance 11 is multiple and is arranged in horizontal curved trisection, the outlet end of liquor charging pipeline is communicated with multiple fluid contaminants entrance respectively by arm, the vertical port of opposite side of described U-shaped structure is as gaseous contaminant outlet 13.
As the utility model preferred embodiment, this device can comprise control system, described temperature controller and the controller of constant flow pump are connected with control system 5 respectively, described temperature controller for the evaporating temperature setting value that reads control system and export and described temperature controller compare with evaporating temperature setting value for the temperature signal of vaporization chamber that reads described thermopair and export, then comparative result is exported to control system, described control system exports control signal to temperature controller according to comparative result, temperature controller is again by the start and stop of described Control heater switch, the controller of described constant flow pump rotates control signal for the constant flow pump reading described control system output, described control system is used for presetting pollutant parameter or manual input pollutant parameter calculate volumetric flow rate and the evaporating temperature setting value of fluid contaminants according to pollutant parameter, then output constant current pump rotates control signal and to the controller of constant flow pump evaporating temperature setting value is exported to temperature controller.
Preferably, the diameter of the medial leg in multiple arms of the outlet end of liquor charging pipeline is greater than the diameter of the arm being positioned at medial leg both sides, and like this when fluid flow is less, liquid preferentially by medial leg, enters vaporization chamber with fluidised form; When fluid flow is larger, two side branch play shunting action, are convenient to the gasification of pollutant.
Vaporization chamber preferably adopts quartz glass.The thickness 4-8mm of vaporization chamber glass can, the heating power according to selecting is determined, the thickness adopted when power is larger is larger.Heating power is determined according to test air quantity, and the large then heating power of test air quantity increases.(about 100-800m under the test air quantity of general automobile filter
3/ h), the quartz glass that preferred employing 5-6mm is thick.
Preferred described air line adopts teflon, and liquid line and liquor charging pipeline adopt the flexible pipe that can not produce adsorbing fluororubber to organism and water, all can not produce the component of target contaminant and generating capacity and disturb, and ensures quality occurs.
The operation method of this device is as follows:
Select the air quantity tested in the controls, pollutant kind and concentration, control system calculates the volumetric flow rate of required fluid contaminants and required evaporating temperature accordingly, and control temperature controller 8, electrical heating wire 7 pairs of vaporization chambers 6 are utilized to heat, after temperature reaches desired value, user's manual unlocking suspended body flowmeter 2, and set flow value.Control system 5 controls constant flow pump 4 afterwards, according to the calculated value of the liquid pollutant volumetric flow rate obtained before, to vaporization chamber delivering liquid pollutant.Pollutant by heating evaporation, takes generator out of by air-flow in vaporization chamber simultaneously, sends into test macro.
This device can preset the multiple pollutant parameters such as toluene, ethylbenzene, benzene, formaldehyde, and wherein formaldehyde can adopt the aqueous solution of 37%, and other adopt the pollutant of liquid form.Occur as example with toluene and formaldehyde, user sets test air quantity (m in control system 5
3/ h), pollutant kind, pollutant levels (ppm or mg/m
3) after, the pollutant mass rate (g/min) needed for control system calculates, and according to the density (g/ml) of fluid contaminants, calculate the volumetric flow rate (ml/min) of pollutant,
As: test condition is 23 DEG C, during 101.3KPa, and in control system, fluid contaminants volumetric flow rate calculates formula:
V＝P×H/ρ/θ/60
In formula:
V---fluid contaminants volumetric flow rate, ml/min;
P---gaseous contamination substrate concentration, ppm (or mg/m
3, wherein toluene 1ppm=3.79mg/m
3; Benzene 1ppm=Xmg/m
3; Ethylbenzene 1ppm=3.79mg/m
3; Formaldehyde 1ppm=3.79mg/m
3);
H---test air quantity, m
3/ h;
ρ---fluid contaminants density, g/ml.Toluene=0.867, benzene=0.879, ethylbenzene=0.867,37% formalin=0.815
θ---pollutant levels in liquid, toluene=1, benzene=1, ethylbenzene=1, formaldehyde=0.37
In the controls, user inputs pollutant kind and concentration, test air quantity, and control system by the volumetric flow rate needed for calculating according to preset value, and controls constant flow pump accordingly; If the non-parameter preset of device, pollutant levels θ in used fluid contaminants density p and liquid etc. can manually provide by user.
After calculating the volumetric flow rate (ml/min) of pollutant, by kind and the flow of pollutant, control the heating-up temperature of temperature controller, as: toluene boiling point is 110 DEG C, and setting heating-up temperature is 135-145 DEG C (according to flow value fine setting).Formalin boiling point can be similar to the boiling point thinking water, is about 100 DEG C, and setting heating-up temperature is 130-140 DEG C (according to flow value fine setting).Benzene, ethylbenzene or other pollutants etc. respectively according to its boiling point height and uninterrupted, corresponding rising with reduce heating-up temperature.
After the temperature of vaporization chamber reaches desired value, user opens suspended body flowmeter, passes into pressurized air.Pollutant after evaporation, is taken out of by pressurized air, sends into test macro.Pressurized air residence time in vaporization chamber is about 1.0-1.2s (according to generating capacity fine setting), and the air consumption (L/min) calculated accordingly, pressure precision is less demanding, a little higher than atmospheric pressure, comparatively suitable with 1.3-1.5bar.
When using liquid line and liquor charging pipeline (pump line) of certain diameter, by regulating constant current revolution speed, get final product the operational throughput of regulates liquid.The rotating speed of constant flow pump and operational throughput are linear relationship, and operational throughput precision is ± 1.5%, and suppose that the pollutant of required test is toluene, concentration is 80ppm, and test air quantity is 100-800m
3/ h, then the liquid pollutant consumption calculated is 0.58-4.67ml/min, uses internal diameter 1.6mm, the pump line of external diameter 4.8mm, and when using this pump line, the operational throughput of constant flow pump is 0.027-27ml/min, therefore at test air quantity scope (100-800m
3/ h) in, constant flow pump rotational speed regulation scope is that 2.2-17.3 turns/min.Under identical air quantity, same concentrations, when test contaminant is formaldehyde, the formalin using 37% is as pollutant sources, and institute's expense is 0.45-3.58ml/min, then constant flow pump rotational speed regulation scope is that 1.7-13.3 turns/min.
When test air quantity is less or target pollutant concentration is very little, the amount of pollutant of the required liquid state calculated can be very little.The solution after dilution can be adopted occur, suppose that test air quantity is 1000m
3/ h, concentration of formaldehyde is 1.0mg/m
3time, calculating required formaldehyde mass rate is 0.017g/min, now can adopt the formalin of low concentration.Being diluted by the formalin of 37% is 1%, and now required formalin flow is 1.67ml/min, calculates constant flow pump rotating speed 6.2 turns/min.Under the same conditions, if target contaminant is toluene, due to water insoluble, can adopt the mode that alcohol dilutes, being alcoholic solution by toluene proportioning, is according to generating capacity equally, and proportioning is variable concentrations.
Claims (8)
1. the gaseous organic pollutant generator for air strainer test macro, it comprises liquid container, described liquid container outlet is connected with constant flow pump inlet by liquid line, the liquid outlet of described constant flow pump is connected with the fluid contaminants entrance of vaporization chamber by liquor charging pipeline, the air intake of suspended body flowmeter and compressed air communication, the air out of suspended body flowmeter is connected by air line with the compressed air inlet of vaporization chamber, electrical heating wire is provided with outside described vaporization chamber, heat-insulation layer is provided with in electrical heating wire outside, electrical heating wire is connected with solid-state relay by heater switch, it is characterized in that: in described vaporization chamber, be inserted with thermopair, described thermopair and solid-state relay are connected with temperature controller respectively by wire, described vaporization chamber is U-shaped structure, and a side roof part of U-shaped structure is provided with horizontal curved trisection, described compressed air inlet is arranged on horizontal curved trisection inflow point, described fluid contaminants entrance is multiple and is arranged in horizontal curved trisection, the outlet end of liquor charging pipeline is communicated with multiple fluid contaminants entrance respectively by arm, the vertical port of opposite side of described U-shaped structure exports as gaseous contaminant.
2. the gaseous organic pollutant generator for air strainer test macro according to claim 1, is characterized in that: the diameter of the medial leg in multiple arms of the outlet end of liquor charging pipeline is greater than the diameter of the arm being positioned at medial leg both sides.
3. the gaseous organic pollutant generator for air strainer test macro according to claim 1 and 2, is characterized in that: described vaporization chamber adopts quartz glass.
4. the gaseous organic pollutant generator for air strainer test macro according to claim 3, is characterized in that: the thickness of the quartz glass of described vaporization chamber is 4-8mm.
5. the gaseous organic pollutant generator for air strainer test macro according to claim 4, is characterized in that: the thickness of the quartz glass of described vaporization chamber is 5-6mm.
6. the gaseous organic pollutant generator for air strainer test macro according to one of claim 2,4,5, is characterized in that: liquid container is equipped with the polytetrafluoroethylcontainer container lid with retaining valve.
7. the gaseous organic pollutant generator for air strainer test macro according to claim 6, is characterized in that: described air line adopts teflon, and described liquid line and liquor charging pipeline adopt fluororubber flexible pipe.
8. a kind of gaseous organic pollutant generator for air strainer test macro according to claim 7, it is characterized in that: it also comprises control system, described temperature controller and the controller of constant flow pump are connected with control system respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420431089.2U CN204116063U (en) | 2014-07-30 | 2014-07-30 | A kind of gaseous organic pollutant generator for air strainer test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420431089.2U CN204116063U (en) | 2014-07-30 | 2014-07-30 | A kind of gaseous organic pollutant generator for air strainer test macro |
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| Publication Number | Publication Date |
|---|---|
| CN204116063U true CN204116063U (en) | 2015-01-21 |
Family
ID=52333360
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|---|---|---|---|
| CN201420431089.2U Withdrawn - After Issue CN204116063U (en) | 2014-07-30 | 2014-07-30 | A kind of gaseous organic pollutant generator for air strainer test macro |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155132A (en) * | 2014-07-30 | 2014-11-19 | 天津大学 | Gaseous organic pollutant generator used for air filter testing system |
| CN105664510A (en) * | 2016-02-26 | 2016-06-15 | 天津大学建筑设计研究院 | Evaporation chamber of gaseous organic pollutant generator |
-
2014
- 2014-07-30 CN CN201420431089.2U patent/CN204116063U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155132A (en) * | 2014-07-30 | 2014-11-19 | 天津大学 | Gaseous organic pollutant generator used for air filter testing system |
| CN104155132B (en) * | 2014-07-30 | 2016-09-07 | 天津大学 | A kind of gaseous organic pollutant generator for air filter test system |
| CN105664510A (en) * | 2016-02-26 | 2016-06-15 | 天津大学建筑设计研究院 | Evaporation chamber of gaseous organic pollutant generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20160907 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |