CN104122374A - Method and device for checking sulfur trioxide sampling test system - Google Patents
Method and device for checking sulfur trioxide sampling test system Download PDFInfo
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Abstract
The invention discloses a method for checking a sulfur trioxide sampling test system. The method comprises the following steps: (1) preparing mixed gas containing sulfur dioxide and oxygen, and providing a reaction site and a flowing path of the mixed gas; (2) causing the mixed gas to react and generate sampling gas containing sulfur trioxide, and causing the sampling gas to flow to the sulfur trioxide sampling test system; (3) obtaining a sulfur dioxide voltage percentage wSO2 before reacting in the mixed gas and a sulfur dioxide voltage percentage wSO2 after reacting in the sampling gas; (4) carrying out sampling test on the sampling gas by the sulfur trioxide sampling test system so as to obtain a sulfur trioxide test concentration CSO3 of test in the sampling gas; and (5) calculating to obtain a sulfur trioxide theoretical concentration CSO3 in the sampling gas, and comparing the sulfur trioxide theoretical concentration CSO3 with the sulfur trioxide test concentration CSO3 of test. The method for checking the sulfur trioxide sampling test system is capable of detecting the sampling accuracy of the sulfur trioxide sampling test system. The invention also discloses a device for checking the sulfur trioxide sampling test system.
Description
Technical field
The present invention relates to environmental technology field, particularly a kind of method of calibration and device of sulfuric anhydride sampling test macro.
Background technology
In power plant boiler flue gas, often contain a large amount of harmful gases, wherein SO3 (sulfuric anhydride) very easily the water vapor in flue gas be combined and form sulfuric acid vapor.Sulfuric acid vapor has following characteristic: can on the heating surface lower than acid dew point, condense at wall temperature.Above-mentioned characteristic will cause heavy corrosion to heating surface or sweetener.
Present stage, the above-mentioned etching problem existing for solving thermal power plant, SO3 concentration often need to test flue gas when power plant moves in, adopt a kind of sulfuric anhydride sampling test macro, a kind of to SO3 chemistry sampling and analytical approach in flue gas according in GB GB/T21508-2008 of this system, flue gas is sampled and processed, such as, with deionized water rinsing, be surely dissolved in 100ml volumetric flask, measure the content of acid ion in washing lotion, and convert and obtain the content of SO3 and the concentration C of SO3 in the flue gas of sampling according to the requirement in GB
so3.
But, whether the method for testing of SO3 sampling test macro is accurate, or under different operating environment, whether SO3 sampling test macro can realize Measurement accuracy all cannot guarantee, this will directly affect the judgement of thermal power plant to equipment corrosion degree, and then affects the serviceable life of flue dust equipment.
Therefore, how providing method of calibration and the device of a kind of SO3 sampling test macro, can carry out verification to the sample test result of test macro of SO3, is those skilled in the art's technical issues that need to address.
Summary of the invention
Object of the present invention is for providing a kind of method of calibration and calibration equipment of sulfuric anhydride sampling test macro.This method of calibration and device, can carry out verification to the sample test result of test macro of SO3.
For solving the problems of the technologies described above, the invention provides a kind of method of calibration of sulfuric anhydride sampling test macro, comprise the following steps:
1) mixed gas that preparation contains sulphuric dioxide and oxygen, for described mixed gas provides reacting environment and circulation path;
2) described mixed gas reaction generates the sample gas that contains sulfuric anhydride, and flows to described sulfuric anhydride sampling test macro;
3) obtain the percent by volume w of the sulphuric dioxide in described mixed gas
before SO2 reactionpercent by volume w with sulphuric dioxide in described sample gas
after SO2 reaction;
4) described sulfuric anhydride sampling test macro is to the test of sampling of described sample gas, to obtain the test concentrations C of sulfuric anhydride in described sample gas
sO3 test;
5) basis
calculate the theoretical concentration C that in described sample gas, sulfuric anhydride has
sO3 is theoreticalwith with C
sO3 testrelatively, wherein, C is by C
sO3 is theoreticalbe scaled to the reduced parameter of corresponding unit.
Cannot obtaining from the market containing sulfur trioxide gas of concentration known, this calibration equipment is by a kind of the easiest method, utilize sulphuric dioxide and oxygen to prepare sulfuric anhydride as raw material, and by before detection reaction and the content of reacted sulphuric dioxide, utilize element conservation principle to form simple computing formula, obtained the theoretical concentration C of sulfuric anhydride
sO3 is theoretical, by C
sO3 is theoreticalas C
sO3 testcontrol basis.Visible, be computation process or to build device all relatively simple, can carry out accurately and efficiently verification.
Preferably, in step 4) in, w
after SO2 reactionafter numerical stability, open described sulfuric anhydride sampling test macro and measure C
sO3 test.
Preferably, in step 1) in, it is sulfur dioxide gas and the air of A that volume fraction is provided, the two is combined to form described mixed gas;
In step 3) in, by SO 2 sensor, measure w
after SO2 reaction; Measure the flow Q1 of described sulfur dioxide gas and the flow Q2 of described mixed gas, to calculate w
before SO2 reaction;
Wherein,
Preferably, in step 1) in, after collecting, described sulfur dioxide gas and described air form described mixed gas.
Preferably, in step 3) in, before described SO 2 sensor measures, reduce the flow velocity of described sample gas.
Preferably, in step 1) and step 2) between also there are following steps:
11) check the impermeability of described reacting environment and described circulation path.
Preferably, in step 2) in, along described mixed gas circulation path, extract described mixed gas, to make it have predetermined flow velocity.
Preferably, in step 2) in, control the temperature of reaction of described mixed gas, and make it remain on predetermined temperature.
The present invention also provides a kind of calibration equipment of sulfuric anhydride sampling test macro, also comprises:
Gas supply device, for supplying with the mixed gas that contains sulphuric dioxide and oxygen;
Reacting furnace and pipeline, described mixed gas can enter described reacting furnace by described pipeline, and the sample gas that contains sulfuric anhydride in described reaction reaction in furnace generation, described sample gas can feed to described sulfuric anhydride sampling test macro by described pipeline, so that described sulfuric anhydride sampling test macro records the test concentrations C of sulfuric anhydride in described sample gas
sO3 test;
Measure device, described in measure the percent by volume w that device measures the sulphuric dioxide in described mixed gas
before SO2 reaction, and the percent by volume w of the sulphuric dioxide in described sample gas
after SO2 reaction, to obtain the theoretical concentration C of the sulfuric anhydride in described sample gas
sO3 is theoretical, described C
sO3 testand C
sO3 is theoreticalrelatively can obtain the detection error of described sulfuric anhydride sampling test macro (6);
Wherein,
c is by C
sO3 is theoreticalbe scaled to the reduced parameter with corresponding unit.
Cannot obtaining from the market containing sulfur trioxide gas of concentration known, this calibration equipment is by a kind of the easiest method, utilize sulphuric dioxide and oxygen to prepare sulfuric anhydride as raw material, and by before detection reaction and the content of reacted sulphuric dioxide, utilize element conservation principle to form simple computing formula, obtained the theoretical concentration C of sulfuric anhydride
sO3 is theoretical, by C
sO3 is theoreticalas C
sO3 testcontrol basis.Visible, be computation process or to build device all relatively simple, can carry out accurately and efficiently verification.
Preferably, described gas supply device comprises sulphuric dioxide gas bottle and the air fed feeding pipe of supplying with sulfur dioxide gas, and described sulfur dioxide gas contains the sulphuric dioxide that volume fraction is A, and described feeding pipe is communicated to external environment;
The described device that measures comprises:
First flow meter, described first flow meter connects the outlet of described sulphuric dioxide gas bottle, for measuring the flow Q1 of described sulfur dioxide gas;
The second flowmeter, described the second flowmeter connects the import of described reacting furnace, for measuring the flow Q2 of described mixed gas, and calculates w in conjunction with Q1
before SO2 reaction;
Wherein,
Described calibration equipment also comprises SO 2 sensor, and described SO 2 sensor is connected in described reacting furnace to the described pipeline between described sulfuric anhydride sampling test macro, for measuring w
after SO2 reaction.
Preferably, described gas supply device comprises sulphuric dioxide gas bottle and the air fed feeding pipe of supplying with sulfur dioxide gas, and described sulfur dioxide gas contains the sulphuric dioxide that volume fraction is A, and described feeding pipe is communicated to external environment;
The described device that measures comprises:
First flow meter, described first flow meter connects the outlet of described sulphuric dioxide gas bottle, for measuring the flow Q1 of described sulfur dioxide gas;
The second flowmeter, described the second flowmeter connects the import of described reacting furnace, for measuring the flow Q2 of described mixed gas, and calculates w in conjunction with Q1
before SO2 reaction;
Wherein,
Described calibration equipment also comprises and measures on-off valve and SO 2 sensor, and the two is connected in the described pipeline after described sulfuric anhydride sampling test macro successively, and described SO 2 sensor measures w
after SO2 reactionafterwards, described in measure on-off valve and close so that described sulfuric anhydride sampling test macro starts sampling.
Preferably, also comprise and be connected in described the second flowmeter mixing tank before, described sulfur dioxide gas and described air come together in after described mixing tank, form described mixed gas, jointly flow to described reacting furnace.
Preferably, also comprise that being arranged on described SO 2 sensor detects mouthful deceleration tank at place, Speed Reduction after described sample gas enters in described deceleration tank.
Preferably, also comprise aspiration pump, described aspiration pump is connected to the described pipeline after described SO 2 sensor and described sulfuric anhydride sampling test macro.
Preferably, the attemperating unit and the temperature measuring equipment that also comprise electrical connection; Described attemperating unit regulates the temperature in described reacting furnace, and when described temperature measuring equipment senses the temperature arrival predetermined temperature in described reacting furnace, described attemperating unit makes the temperature in described reacting furnace remain on described predetermined temperature.
Accompanying drawing explanation
Fig. 1 is the layout schematic diagram of the first embodiment of the calibration equipment of sulfuric anhydride provided by the invention sampling test macro;
Fig. 2 is the checking process block diagram of the first embodiment of the method for calibration of sulfuric anhydride provided by the invention sampling test macro;
Fig. 3 is the checking process block diagram of the second embodiment of method of calibration provided by the invention;
Fig. 4 is the layout schematic diagram of the second embodiment of the calibration equipment of sulfuric anhydride provided by the invention sampling test macro;
Fig. 5 is the checking process block diagram of the third embodiment of method of calibration provided by the invention.
In Fig. 1-Fig. 5:
Sulphuric dioxide gas bottle 1, feeding pipe 2, mixing tank 3, first flow meter 41, the second flowmeter 42, reacting furnace 5, attemperating unit 51, temperature measuring equipment 52, sulfuric anhydride sampling test macro 6, SO 2 sensor 7, deceleration tank 8, aspiration pump 9, the first on-off valve 11, the second on-off valve 12, the 3rd on-off valve 13, reduction valve 14, sampling on-off valve 61, measure on-off valve 71
Embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the layout schematic diagram of the first embodiment of the calibration equipment of sulfuric anhydride provided by the invention sampling test macro; Fig. 2 is the checking process block diagram of the first embodiment of the method for calibration of sulfuric anhydride provided by the invention sampling test macro.
The invention provides the calibration equipment of a kind of sulfuric anhydride sampling test macro 6 (hereinafter to be referred as system), this calibration equipment provides sample gas to be detected for system 6, and is detected and obtained the test concentrations C of sulfuric anhydride in sample gas by described system 6
sO3 test.
In addition, this system 6 also has gas supply device, reacting furnace 5, pipeline and measures device.Gas supply device provides the mixed gas that contains sulphuric dioxide and oxygen to calibration equipment.Reacting furnace 5 possesses the condition of sulphuric dioxide and oxygen reaction generation sulfuric anhydride, and pipeline transmits the gas of each stage generation of reaction between the various piece in calibration equipment.Measure device for measuring the percent by volume w of mixed gas sulphuric dioxide
before SO2 reaction, the shared number percent of sulphuric dioxide in the mixed gas before reaction, meanwhile, can also measure the percent by volume w of the sulphuric dioxide in sample gas
after SO2 reaction, i.e. sulphuric dioxide shared number percent in sample gas after reaction.
Concrete checking procedure is as described below:
The mixed gas that S1, preparation contain sulphuric dioxide and oxygen, for described mixed gas provides reacting environment and circulation path;
S2, mixed gas flow out from gas supply device, by pipeline, lead to reacting furnace 5, in the interior reaction of reacting furnace 5, generate sulfuric anhydride, the sulfuric anhydride, unreacted sulphuric dioxide and other foreign gas that generate are mixed to form sample gas, this sample gas flows to system 6 by pipeline, for system 6 sample detecting;
S3, obtain the percent by volume w of the sulphuric dioxide in described mixed gas
before SO2 reactionpercent by volume w with sulphuric dioxide in described sample gas
after SO2 reaction;
S4, open sampling on-off valve 61, system 6 starts sampling, obtains the test concentrations C of sulfuric anhydride in sample gas
sO3 test;
S5, in conjunction with w
before SO2 reaction, w
after SO2 reactioncan calculate with formula m the theoretical concentration C that the sulfuric anhydride in sample gas has
sO3 is theoretical, and and C
sO3 testcompare, and draw the sampling error of system 6;
Wherein, formula m is
c is by C
sO3 is theoreticalbe scaled to the reduced parameter of corresponding unit.
C is generally 10 power level, such as, if do not convert, the C obtaining so
sO3 is theoreticalunit be g/L, C is set to 10
6time, C
sO3 is theoreticalunit will be scaled to mg/m
3.22.4 is unit molar volume, and unit is L/mol; 80 is the molar volume of sulfuric anhydride, and unit is g/mol; Percent by volume w
before SO2 reactionand w
after SO2 reactionbe the pure values without unit.
Cannot obtaining from the market containing sulfur trioxide gas of concentration known, this calibration equipment is by a kind of the easiest method, utilize sulphuric dioxide and oxygen to prepare sulfuric anhydride as raw material, and by before detection reaction and the content of reacted sulphuric dioxide, utilize element conservation principle to form simple computing formula, obtained the theoretical concentration C of sulfuric anhydride
sO3 is theoretical, by C
sO3 is theoreticalas C
sO3 testcontrol basis.Visible, be computation process or to build device all relatively simple, can carry out accurately and efficiently verification.
Should be appreciated that gas enters after calibration equipment, in order to feed to system 6, gas should have certain flowing velocity, can apply positive pressure by pressing machine and realize, and also aspiration pump 9 can be set, by providing negative pressures to realize.
In each embodiment in this article, in order to facilitate control system 6, sampling on-off valve 61 can be set before system 6, with the keying of control system 6.
Further, for guaranteeing C
sO3 is theoreticaland C
sO3 testtest accuracy, w
after SO2 reactionafter numerical stability, then open system 6.W
after SO2 reactionnumerical stability represents that the gas reaction in reacting furnace 5 is complete, and the indices of gas tends towards stability, and now obtains C
sO3 test, w
before SO2 reaction, be conducive to reduce C
sO3 testand C
sO3 is theoreticalat the error of calculation and the test error of reaction incipient stage, be C
sO3 testprovide true and reliable to making a gesture of measuring C
sO3 is theoretical.
Please refer to Fig. 3, the checking process block diagram of the second embodiment that Fig. 3 is method of calibration provided by the invention.
As Fig. 3, further, in step S1, it is sulfur dioxide gas and the air of A that volume fraction is provided respectively, and the two is combined to form mixed gas;
Such as, gas supply device comprises sulphuric dioxide gas bottle 1 and air fed feeding pipe 2, the sulfur dioxide gas that the interior reservoir volume mark of this sulphuric dioxide gas bottle 1 is A; And feeding pipe 2 is directly communicated to external environment, make oxygen directly from air, and two kinds of gases finally feed to system 6 jointly.
For the ease of controlling gas, can the first on-off valve 11 be set in sulphuric dioxide gas bottle 1 exit, at described feeding pipe, 2 places arrange the second on-off valve 12, and, sulphuric dioxide gas bottle 1 is generally equipped with reduction valve 14, during supply gas, opens corresponding reduction valve 14 and on-off valve.
In step S3, by SO 2 sensor 7, measure described w
after SO2 reaction; Measure the flow Q1 of sulfur dioxide gas and the flow Q2 of mixed gas, according to formula n, calculate described w
before SO2 reaction.
Measure device and comprise first flow meter 41, the second flowmeter 42 and SO 2 sensor 7.First flow meter 41 is connected in the exit of sulphuric dioxide gas bottle 1, for measuring the flow Q1 of sulfur dioxide gas; The second flowmeter 42 is connected in the inflow point of reacting furnace 5, for measuring the flow Q2 of mixed gas.In conjunction with Q1, Q2 and formula n, can calculate w
before SO2 reaction:
Wherein, formula n is
Meanwhile, SO 2 sensor 7 is connected to reacting furnace 5 to the pipeline between system 6, for detection of the percent by volume w of the sulphuric dioxide of the sample gas of generation after reaction
after SO2 reaction, as the w of SO 2 sensor 7 demonstrations
after SO2 reactionafter registration is stable, system 6 start sampling and obtain for C
sO3 is theoreticalc relatively
sO3 test, and by w now
after SO2 reactionsubstitution formula m, calculates C
sO3 is theoretical.
Before verification starts, consider that system 6 samplings are convenient, C
sO3 testthe factors such as numerical value is reasonable, operating personnel will roughly regulate the flow of sulphuric dioxide gas bottle 1, and the sulfur dioxide gas that makes to supply with can produce has predetermined C
sO3 testsample gas.
Mixed gas is after reacting furnace 5, and a part of Sulphur Dioxide becomes sulfuric anhydride, and makes w
after SO2 reactionin the general range ability in SO 2 sensor 7, can directly measure, convenient and swift; And the concentration of sulphuric dioxide in mixed gas before reaction is generally larger, need to adopt the SO 2 sensor 7 that range is larger, this sensor cost is higher, and in order to save cost, the present invention has assisted w by two flowmeters
before SO2 reactionmeasure, and be applied to calculate C
sO3 is theoretical, effectively reduced verification cost.
It should be noted that, the numerical value unit that sensor measures is not directly generally percentage, need to be translated into percentage substitution formula m again.
Please refer to Fig. 4, Fig. 4 is the layout schematic diagram of the second embodiment of the calibration equipment of sulfuric anhydride provided by the invention sampling test macro.
In the second embodiment, this calibration equipment can also comprise and measures on-off valve 71, and, the SO 2 sensor in the first embodiment 7 is arranged on system 6 pipeline afterwards, and measure on-off valve 71, be arranged between SO 2 sensor 7 and system 6; Other settings are identical with the first embodiment.
In this embodiment, the w measuring when SO 2 sensor 7
after SO2 reactionafter numerical stability, will measure on-off valve 71 and close, now sample gas will flow to system 6, system 6 samplings.
So, sample gas is flowed through system 6 to the whole pipelines between reacting furnace 5, just by SO 2 sensor 7, is measured; specially do not increasing on the basis of calibration equipment size; the cooling path that has extended sample gas, is conducive to protect SO 2 sensor 7, and guarantees to measure accuracy.
And for the calibration equipment of the first embodiment, needn't arrange and measure on-off valve 71, can read the number of degrees of SO 2 sensor 7 simultaneously, and carry out system 6 samplings, as long as make reacting furnace 5 to the pipeline between SO 2 sensor 7 there is sufficient length, so that gas cooling.
Further, for improving the reaction efficiency of sulphuric dioxide and oxygen, in step S1, sulfur dioxide gas and air can also collect before the second flowmeter 42, and the two fully contacts, and formed the mixed gas that feeds to reacting furnace 5 after collecting.
Correspondingly, this calibration equipment can also comprise mixing tank 3, this mixing tank 3 is connected between gas supply device and the second flowmeter 42, because mixing tank 3 has intracavity space, the mixed gas that sulfur dioxide gas and air are combined to form can collect in this mixing tank 3, after mixing fully, continue circulation, to provide well-mixed reacting gas to reacting furnace 5, improve reaction efficiency.
SO 2 sensor 7 measures w
after SO2 reactiontime, if flow velocity is too fast, will cause SO 2 sensor 7 to measure not in time, cannot accurately measure, in order to improve w
after SO2 reactionmeasure accuracy, in step S3, before SO 2 sensor 7 measures, reduce the flow velocity of sample gas.
Correspondingly, can deceleration tank 8 be set at the detection mouth place of SO 2 sensor 7, this deceleration tank 8 can have the inner chamber that is greater than pipeline internal diameter, is equivalent to pipeline reducing, and sample gas flow velocity is reduced; Also can reduction gear be set in inside, in a word, in the time of can making sample gas by this deceleration tank 8, flow velocity is reduced to SO 2 sensor 7 and can measures.Consider the convenience of setting, deceleration tank 8 have be greater than caliber inner chamber for preferred embodiment.
Please refer to Fig. 5, the checking process block diagram of the third embodiment that Fig. 5 is method of calibration provided by the invention.
In the third embodiment of method of calibration, between step S2 and step S3, can also there is step S21:
The impermeability of S21, inspection reacting environment and described circulation path.
At gas supply device, reacting furnace 5, pipeline etc. after setting completed, calibration equipment integral body is carried out to airtight test, such as, can adopt tensimeter to measure force value to each pipeline section of choosing, if force value is abnormal, show this place's gas leakage, take measures in time still can to complete smoothly verification.
Further, in step S2, along described mixed gas circulation path, extract described mixed gas, to make it have predetermined flow velocity.
On pipeline after sampling test macro 6 and SO 2 sensor 7, aspiration pump 9 is set, this aspiration pump 9 extracts this mixed gas along the flow direction of mixed gas, to make it have predetermined flow velocity, and can in calibration equipment, flow to swimmingly reacting furnace 5, SO 2 sensor 7 and sampling test macro 6.
In order to operate facility, can the 3rd on-off valve 13 be set in aspiration pump 9 porch, so, in the first embodiment of calibration equipment, SO 2 sensor 7 measures w
after SO2 reactionafter, close the 3rd on-off valve 13.Certainly, can also be set to the pressing machine that mixed gas provides normal pressure, by contrast, aspiration pump 9 is set more convenient, cost is lower.
Further, in step S2, the temperature in control reacting furnace 5, to predetermined temperature, remains on this predetermined temperature.
Be attemperating unit 51 and the temperature measuring equipment 52 that calibration equipment can also comprise electrical connection, attemperating unit 51 regulates the temperature in reacting furnaces 5, and when temperature measuring equipment 52 measures temperature in reacting furnace 5 and reaches predetermined temperature, attemperating unit 51 is controlled these temperature and remained unchanged.The reaction that should be appreciated that sulphuric dioxide and oxygen generation sulfuric anhydride will have maximum conversion ratio under this predetermined temperature.
Arrange after this attemperating unit 51 and temperature measuring equipment 52, will further improve the formation efficiency of sulfuric anhydride, thereby improve verification efficiency.
Above method of calibration and the device of a kind of sulfuric anhydride sampling test macro provided by the present invention are described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (15)
1. a method of calibration for sulfuric anhydride sampling test macro, is characterized in that, comprises the following steps:
1) mixed gas that preparation contains sulphuric dioxide and oxygen, for described mixed gas provides reacting environment and circulation path;
2) described mixed gas reaction generates the sample gas that contains sulfuric anhydride, and flows to described sulfuric anhydride sampling test macro (6);
3) obtain the percent by volume w of the sulphuric dioxide in described mixed gas
before SO2 reactionpercent by volume w with sulphuric dioxide in described sample gas
after SO2 reaction;
4) described sulfuric anhydride sampling test macro (6) is to the test of sampling of described sample gas, to obtain the test concentrations C of sulfuric anhydride in described sample gas
sO3 test;
5) basis
calculate the theoretical concentration C that in described sample gas, sulfuric anhydride has
sO3 is theoreticalwith with C
sO3 testrelatively, wherein, C is by C
sO3 is theoreticalbe scaled to the reduced parameter of corresponding unit.
2. method of calibration as claimed in claim 1, is characterized in that: in step 4) in, w
after SO2 reactionafter numerical stability, open described sulfuric anhydride sampling test macro (6) and measure C
sO3 test.
3. method of calibration as claimed in claim 2, is characterized in that:
In step 1) in, it is sulfur dioxide gas and the air of A that volume fraction is provided, the two is combined to form described mixed gas;
In step 3) in, by SO 2 sensor (7), measure w
after SO2 reaction; Measure the flow Q1 of described sulfur dioxide gas and the flow Q2 of described mixed gas, to calculate w
before SO2 reaction;
Wherein,
4. method of calibration as claimed in claim 3, is characterized in that, in step 1) in, after collecting, described sulfur dioxide gas and described air form described mixed gas.
5. method of calibration as claimed in claim 3, is characterized in that, in step 3) in, before described SO 2 sensor (7) measures, reduce the flow velocity of described sample gas.
6. the method for calibration as described in claim 2-5 any one, is characterized in that, in step 1) and step 2) between also there are following steps:
11) check the impermeability of described reacting environment and described circulation path.
7. the method for calibration as described in claim 2-5 any one, is characterized in that, in step 2) in, along described mixed gas circulation path, extract described mixed gas, to make it have predetermined flow velocity.
8. the method for calibration as described in claim 2-5 any one, is characterized in that, in step 2) in, control the temperature of reaction of described mixed gas, and make it remain on predetermined temperature.
9. a calibration equipment for sulfuric anhydride sampling test macro, is characterized in that, also comprises:
Gas supply device, for supplying with the mixed gas that contains sulphuric dioxide and oxygen;
Reacting furnace (5) and pipeline, described mixed gas can enter described reacting furnace (5) by described pipeline, and reaction generates the sample gas that contains sulfuric anhydride in described reacting furnace (5), described sample gas can feed to described sulfuric anhydride sampling test macro (6) by described pipeline, so that described sulfuric anhydride sampling test macro (6) records the test concentrations C of sulfuric anhydride in described sample gas
sO3 test;
Measure device, described in measure the percent by volume w that device measures the sulphuric dioxide in described mixed gas
before SO2 reaction, and the percent by volume w of the sulphuric dioxide in described sample gas
after SO2 reaction, to obtain the theoretical concentration C of the sulfuric anhydride in described sample gas
sO3 is theoretical, described C
sO3 testand C
sO3 is theoreticalrelatively can obtain the detection error of described sulfuric anhydride sampling test macro (6);
Wherein,
c is by C
sO3 is theoreticalbe scaled to the reduced parameter with corresponding unit.
10. calibration equipment as claimed in claim 9, is characterized in that,
Described gas supply device comprises sulphuric dioxide gas bottle (1) and the air fed feeding pipe of supplying with sulfur dioxide gas, and described sulfur dioxide gas contains the sulphuric dioxide that volume fraction is A, and described feeding pipe is communicated to external environment;
The described device that measures comprises:
First flow meter (41), described first flow meter (41) connects the outlet of described sulphuric dioxide gas bottle (1), for measuring the flow Q1 of described sulfur dioxide gas;
The second flowmeter (42), described the second flowmeter (42) connects the import of described reacting furnace (5), for measuring the flow Q2 of described mixed gas, and calculates w in conjunction with Q1
before SO2 reaction;
Wherein,
Described calibration equipment also comprises SO 2 sensor (7), and described SO 2 sensor (7) is connected in described reacting furnace (5) to the described pipeline between described sulfuric anhydride sampling test macro (6), for measuring w
after SO2 reaction.
11. calibration equipments as claimed in claim 9, is characterized in that,
Described gas supply device comprises sulphuric dioxide gas bottle (1) and the air fed feeding pipe of supplying with sulfur dioxide gas, and described sulfur dioxide gas contains the sulphuric dioxide that volume fraction is A, and described feeding pipe is communicated to external environment;
The described device that measures comprises:
First flow meter (41), described first flow meter (41) connects the outlet of described sulphuric dioxide gas bottle (1), for measuring the flow Q1 of described sulfur dioxide gas;
The second flowmeter (42), described the second flowmeter (42) connects the import of described reacting furnace (5), for measuring the flow Q2 of described mixed gas, and calculates w in conjunction with Q1
before SO2 reaction;
Wherein,
Described calibration equipment also comprises and measures on-off valve (71) and SO 2 sensor (7), and the two is connected in described sulfuric anhydride sampling test macro (6) described pipeline afterwards successively, and described SO 2 sensor (7) measures w
after SO2 reactionafterwards, described in measure on-off valve (71) and close so that described sulfuric anhydride sampling test macro (6) starts sampling.
12. calibration equipments as described in claim 10 or 11, it is characterized in that, also comprise and be connected in described the second flowmeter (42) mixing tank (3) before, described sulfur dioxide gas and described air come together in after described mixing tank (3), form described mixed gas, jointly flow to described reacting furnace.
13. calibration equipments as described in claim 10 or 11, is characterized in that, also comprise that being arranged on described SO 2 sensor (7) detects mouthful deceleration tank (8) at place, Speed Reduction after described sample gas enters in described deceleration tank (8).
14. calibration equipments as described in claim 9-11 any one, it is characterized in that, also comprise aspiration pump (9), described aspiration pump (9) is connected to described SO 2 sensor (7) and described sulfuric anhydride sampling test macro (6) described pipeline afterwards.
15. calibration equipments as described in claim 9-11 any one, is characterized in that, also comprise attemperating unit (51) and the temperature measuring equipment (52) of electrical connection; Described attemperating unit (51) regulates the temperature in described reacting furnace (5), when described temperature measuring equipment (52) senses the temperature arrival predetermined temperature in described reacting furnace (5), described attemperating unit (51) makes the temperature in described reacting furnace (5) remain on described predetermined temperature.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108760988A (en) * | 2018-06-01 | 2018-11-06 | 深圳睿境环保科技有限公司 | A kind of SO3 testing calibration system and methods occurred based on simulated flue gas |
| CN111766341A (en) * | 2020-07-07 | 2020-10-13 | 西安热工研究院有限公司 | Correction method for sulfur trioxide concentration test in industrial waste gas |
| CN111766341B (en) * | 2020-07-07 | 2023-04-25 | 西安热工研究院有限公司 | Correction method for sulfur trioxide concentration test in industrial waste gas |
| CN112162068A (en) * | 2020-11-10 | 2021-01-01 | 西安热工研究院有限公司 | Sulfur trioxide sampling test system and method for absorbing and removing sulfur dioxide interference by adopting isopropanol |
| CN114324756A (en) * | 2021-12-28 | 2022-04-12 | 太原理工大学 | Online real-time measurement device and method for preparing sulfur trioxide gas through sulfur dioxide oxidation |
| CN114324756B (en) * | 2021-12-28 | 2024-03-29 | 太原理工大学 | Online real-time measurement device and method for preparing SO3 by oxidizing SO2 |
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