CN207351837U - A kind of Fume moisture test device - Google Patents
A kind of Fume moisture test device Download PDFInfo
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- CN207351837U CN207351837U CN201721260232.6U CN201721260232U CN207351837U CN 207351837 U CN207351837 U CN 207351837U CN 201721260232 U CN201721260232 U CN 201721260232U CN 207351837 U CN207351837 U CN 207351837U
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Abstract
The utility model provides a kind of Fume moisture test device, including air extractor, sampling pipe, processor, input unit and display device, gas circuit is divided into test gas circuit and bypass gas circuit two by the sampling pipe through threeway, test gas circuit and bypass the gas circuit air outlet is connected through threeway with the air extractor air inlet port, U-tube is equipped with successively along flow of flue gas direction in the test gas circuit, pressure sensor, temperature sensor, flow control valve and flow sensor, the U-tube is equipped with the calcium chloride for being used for fixing moisture content, flow control valve and pressure sensor are equipped with successively along flow of flue gas direction in the bypass gas circuit, the pressure sensor, temperature sensor, flow sensor, input unit and display device are connected with the processor respectively.Using large scale by-pass shunt technology is taken air inlet, substantially reduce and condensed after removing smoke into sampling pipe in tube wall.
Description
Technical field
Flue gas composition technical field of measurement and test is the utility model is related to, more particularly to a kind of Fume moisture test device.
Background technology
Boiler smoke moisture content test is carried out, is used《Particulate matter measure is adopted with gaseous pollutant in the exhaust of fixed-contamination thing
Quadrat method》(GB/T16157) standard method is tested, and the test in relation to Fume moisture in the standard, there is three kinds of methods：a.
Measurement with wet；B. condensation method；C. calcium chloride gravimetric absorption method.
At present in the on-the-spot test of boiler smoke moisture content, generally using measurement with wet.Measurement with wet is widely used, and is
Because it is convenient and efficient when this method is tested at the scene, but accuracy, reliability are too low.
Calcium chloride gravimetric absorption method is the most accurate in three kinds of methods, but calcium chloride gravimetric absorption method, excessively cumbersome because operating
(glass U-tube, pressure gauge, flowmeter, vacuum pump, gas circuit system of connections, balance and appropriate execute-in-place table top etc. need to be equipped with
Deng), on-the-spot test difficulty is big, makes most of testers, hangs back, and is reluctant to carry out on-the-spot test using this method.In addition,
This method is also only applicable to low flue-gas temperature condition in itself.Live smoke test, operating mode is complicated, this is largely limited again
The application of this method in testing.
The content of the invention
Mirror is with this, and the utility model proposes a kind of Fume moisture test device, there is provided easily, high-precision device.
What the technical solution of the utility model was realized in：A kind of Fume moisture test device, including air extractor, adopt
Gas circuit is divided into test gas circuit and bypass gas circuit two by sample pipe, processor, input unit and display device, the sampling pipe through threeway
Bar, test gas circuit and bypass the gas circuit air outlet are connected through threeway with the air extractor air inlet port, the test gas
U-tube, pressure sensor, temperature sensor, flow control valve and flow sensor are equipped with successively along flow of flue gas direction on road,
The U-tube is equipped with the calcium chloride for being used for fixing moisture content, and described bypass is equipped with flow tune successively in gas circuit along flow of flue gas direction
Save valve and pressure sensor, the pressure sensor, temperature sensor, flow sensor, input unit and display device difference
It is connected with the processor.
Further, the bypass gas circuit is equipped with drier, and the drier is arranged on the flow control valve and described
Between sampling pipe.
Further, the bypass gas circuit is equipped with filter, and the filter is arranged on the flow control valve and described
Between sampling pipe.
Further, the bypass gas circuit is equipped with check valve, and the check valve is arranged on the pressure sensor and described
Between air extractor.
Further, the sampling pipe includes sampling inner tube and sampling sleeve, and the sampling inner tube is arranged on the sampling and covers
In pipe, heater strip is equipped between the sampling inner tube and sampling sleeve, the heater strip is connected with the processor.
Further, opening is equipped with above the U-tube, both sides are equipped with the interface with test bypass connection, the opening
If the grinding port plug of sealing, the grinding port plug is equipped with the L-type passage for the inner cavity for connecting the interface and U-tube.
Compared with prior art, the beneficial effects of the utility model are：Using taking air inlet large scale by-pass shunt skill
Art, substantially reduces and is condensed after removing smoke into sampling pipe in tube wall.
Brief description of the drawings
Fig. 1 is a kind of Fume moisture test device principle schematic of the utility model embodiment；
Fig. 2 is the sampling pipe structure diagram of the utility model embodiment；
Fig. 3 is structure diagram when the U-tube of the utility model embodiment is opened；
Fig. 4 is structure diagram when the U-tube of the utility model embodiment is closed；
In figure, 1 air extractor, 2 sampling pipes, 3 threeways, 4 test gas circuits, 5 bypass gas circuits, 6U type pipes, 7 pressure sensors, 8
Temperature sensor, 9 flow control valves, 10 flow sensors, 11 filters, 12 driers, 13 check valves, 14 sampling inner tubes, 15
Sampling sleeve, 16 heater strips, 17 grinding port plugs, 18L type passages, 19 openings, 20 interfaces, 21 metal screens.
Embodiment
In order to be best understood from the utility model technology contents, specific embodiment is provided below, and with reference to attached drawing to this practicality
It is new to be described further.
Referring to Fig. 1 to 4, a kind of Fume moisture test device, including air extractor 1, sampling pipe 2, processor, input unit
And gas circuit is divided into test gas circuit 4 and bypass gas circuit 5 two, the test gas circuit 4 by display device, the sampling pipe 2 through threeway 3
It is connected with bypass 5 air outlet of gas circuit through threeway 3 with 1 air inlet port of air extractor, along flue gas stream in the test gas circuit 4
Dynamic direction is equipped with U-tube 6, pressure sensor 7, temperature sensor 8, flow control valve 9 and flow sensor 10, the U successively
Type pipe 6, which is equipped with, to be used to fix the calcium chloride of moisture content, be equipped with successively along flow of flue gas direction in the bypass gas circuit 5 filter 11,
Drier 12, flow control valve 9, pressure sensor 7 and check valve 13, the pressure sensor 7, temperature sensor 8, flow pass
Sensor 10, input unit and display device are connected with the processor respectively.
Air extractor 1 is opened, flue gas is tested by sampling pipe 2, divides two tunnels by threeway 3, enters test gas circuit 4 all the way,
Another way enters bypass gas circuit 5.Since a tested flue gas part is passed through by bypass gas circuit 5, reduce the system in test
Error.Filter 11 in bypass gas circuit 5 filters the impurity in flue gas, and tested flue gas is dried drier 12,
Effectively protection air extractor 1, to prevent the corrosion damage of impurity and wet flue gas to the pump housing, bypasses the flow control valve 9 in gas circuit 5
The flow for bypassing gas circuit 5 can be adjusted, obtained flow will be tested with electric signal by bypassing the flow sensor 10 in gas circuit 5
Form be transmitted to processor.When room temperature is tested, it is not necessary to open bypass gas circuit 5, bypass in gas circuit 5 and set check valve 13 can be with
Prevent the air outside gas circuit from entering U-tube 6, improve measuring accuracy.Tested flue gas in test gas circuit 4 contains when passing through U-tube 6
Moisture content when be chlorinated calcium uptake, the weight of U-tube 6 can increase, and take out U-tube 6, weighed and fixed moisture content is calculated
Gravimetric value, fixed moisture content gravimetric value is inputted by input unit.The tested flue gas come out from U-tube 6 passes through pressure sensing
Device 7, temperature sensor 8, flow control valve 9 and flow sensor 10, and by appeal sensor when be tested try out it is tested
Relative pressure, temperature and the flow information of flue gas, sensor send the information measured to processor in electrical signal form, finally
Tested flue gas is through 1 row of air extractor to air.Processor is by the moisture content weight of acquisition, flue gas volume, survey flue-gas temperature and is tested
Gas phase Smoke to atm difference be calculated the percentage of tested Fume moisture water capacity, calculation formula for Xsw=(1.24 ×
Gw)/(Vd × (273/ (273+tr) × (Ba+Pr)/101300)+1.24 × Gw), in formula：Xsw is Fume moisture water capacity
Percentage；Gw be the holder absorption equipped with calcium chloride moisture content weight, unit g；The flue gas volume for the test gas circuit that Vd is extracted,
Unit is L；Tr is tested flue-gas temperature, and unit is DEG C；Ba is atmospheric pressure, unit Pa；Pr is tested flue gas relative atmospheric
Pressure difference, unit Pa, 1.24 be the volume that 1g vapor occupies under standard state, i.e. 1.24L/g, 101300 is big for a standard
Air pressure, i.e. 101300Pa.Finally moisture content weight, flue gas volume, survey flue-gas temperature, tested Gas phase Smoke to atm difference and are tested
The percentages show of Fume moisture water capacity is on the display apparatus.
Condensation and tested flue-gas temperature mistake of the flue gas in tube wall when can be effectively reduced due to sample by the method for shunting
Systematic error caused by height.Using shunt method can reduce Fume moisture sampling tube wall condensation, when bypass gas circuit with
The ratio between test gas circuit is arranged on 10：When 1, the systematic error as caused by Fume moisture in sampling tube wall condensation also will be by same
Ratio reduces 1/10, and similarly ratio is provided in 20：When 1, systematic error reduces 1/20.It is higher than when being tested flue-gas temperature in test
During more than 10 DEG C of environment temperature, significantly improved using the measured data precision of shunting, high degree is reduced due to being tested flue gas
Systematic error caused by temperature is excessive, can be further using cooling down when tested flue-gas temperature is higher than more than 100 DEG C of environment temperature
Method (as lengthened sampling length of tube), while improve split ratio, artificial hypothermia and shunting are carried out at the same time and greatly improve device
The scope of application, improves measuring accuracy.
Test initial data
Error statistics：
Directly affected in view of Fume moisture by unit load, combustion conditions (flue-gas temperature), environment temperature, this mistake
Difference calculates data, and two kinds of methods choose load, smoke temperature, one group of data similar in circumstance temperature and carry out the calculating of average deviation respectively (to be surveyed
Examination sequence is not added with *, is not involved in counting), statistical result：
Directly test：Average deviation=6.89；Very poor=21.9
Large scale dividing technology：Average deviation=0.22；Very poor=0.5
Further, metal screen 21 is equipped with 2 air inlet port of sampling pipe, impurity screening, prevents impurity effect from testing
Effect, improves measuring accuracy.
Specifically, air extractor 1 is vacuum pump, it is connected, realizes single with test gas circuit 4 and bypass gas circuit 5 using threeway 3
The black soy sauce function of pump, is adjusted the flue gas flow of test gas circuit 4 and bypass gas circuit 5 by regulating valve, test flow is adjustable
It is 20-40L/min that whole scope pumps the flow that can be extracted in bypass in 0-5L/min, test.
Specifically, the sampling pipe 2 is made of soft materials.
Specifically, the sampling pipe 2 includes sampling inner tube 14 and sampling sleeve 15, the sampling inner tube 14 is arranged on described adopt
In sample casing 15, heater strip 16, the heater strip 16 and the processing are equipped between the sampling inner tube 14 and sampling sleeve 15
Device connects.Condensation of the moisture content in flue gas in sampling pipe 2 is reduced, improves device to test precision.
Specifically, bypass gas circuit 5 is opened when tested flue-gas temperature is higher than 10 DEG C of environment temperature, when tested flue-gas temperature height
Heating wire is powered when 100 DEG C of environment temperature.
Specifically, the top of U-tube 6 is equipped with opening 19, both sides are equipped with the interface 20 with test bypass connection, described to open
Mouth 19 sets the grinding port plug 17 of sealing, and the grinding port plug 17 is equipped with the L-type passage for the inner cavity for connecting the interface 20 and U-tube 6
18.Grinding port plug 17 connects the inner cavity of interface 20 and U-tube 6 during test, and test terminates two grinding port plugs 17 being rotated by 90 °
6 interface 20 of U-tube is sealed, prevents from sampling moisture content in front and rear absorption air, measuring accuracy is improved, easy to weigh.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. Fume moisture test device, it is characterised in that：Including air extractor, sampling pipe, processor, input unit and show Gas circuit is divided into test gas circuit and bypass gas circuit two, test gas circuit and the bypass gas by showing device, the sampling pipe through threeway Road air outlet is connected through threeway with the air extractor air inlet port, is set successively along flow of flue gas direction in the test gas circuit There are U-tube, pressure sensor, temperature sensor, flow control valve and flow sensor, the U-tube, which is equipped with, to be used to fix water The calcium chloride of part, described bypass are equipped with flow control valve and pressure sensor, the pressure successively in gas circuit along flow of flue gas direction Force snesor, temperature sensor, flow sensor, input unit and display device are connected with the processor respectively.
- A kind of 2. Fume moisture test device as claimed in claim 1, it is characterised in that：The bypass gas circuit is equipped with drying Device, the drier are arranged between the flow control valve and the sampling pipe.
- A kind of 3. Fume moisture test device as claimed in claim 1, it is characterised in that：The bypass gas circuit is equipped with filtering Device, the filter are arranged between the flow control valve and the sampling pipe.
- A kind of 4. Fume moisture test device as claimed in claim 1, it is characterised in that：The bypass gas circuit is equipped with unidirectional Valve, the check valve are arranged between the pressure sensor and the air extractor.
- A kind of 5. Fume moisture test device as claimed in claim 1, it is characterised in that：The sampling pipe includes sampling inner tube And sampling sleeve, the sampling inner tube are arranged in the sampling sleeve, and heating is equipped between the sampling inner tube and sampling sleeve Silk, the heater strip are connected with the processor.
- A kind of 6. Fume moisture test device as claimed in claim 1, it is characterised in that：Opening is equipped with above the U-tube, Both sides are equipped with the interface with test bypass connection, and described be open sets the grinding port plug of sealing, and the grinding port plug is equipped with described in connection The L-type passage of the inner cavity of interface and U-tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260232.6U CN207351837U (en) | 2017-09-28 | 2017-09-28 | A kind of Fume moisture test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260232.6U CN207351837U (en) | 2017-09-28 | 2017-09-28 | A kind of Fume moisture test device |
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| Publication Number | Publication Date |
|---|---|
| CN207351837U true CN207351837U (en) | 2018-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721260232.6U Active CN207351837U (en) | 2017-09-28 | 2017-09-28 | A kind of Fume moisture test device |
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| CN (1) | CN207351837U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801840A (en) * | 2018-06-08 | 2018-11-13 | 天津市生态环境监测中心 | A kind of assay method of exhaust gas water capacity scene gravimetric method |
| CN117890166A (en) * | 2024-03-14 | 2024-04-16 | 山西泰瑞祥科技有限公司 | Air pollution monitoring device |
-
2017
- 2017-09-28 CN CN201721260232.6U patent/CN207351837U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801840A (en) * | 2018-06-08 | 2018-11-13 | 天津市生态环境监测中心 | A kind of assay method of exhaust gas water capacity scene gravimetric method |
| CN117890166A (en) * | 2024-03-14 | 2024-04-16 | 山西泰瑞祥科技有限公司 | Air pollution monitoring device |
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