CN85105297A - Instrument for measuring ammonia concentration - Google Patents
Instrument for measuring ammonia concentration Download PDFInfo
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- CN85105297A CN85105297A CN198585105297A CN85105297A CN85105297A CN 85105297 A CN85105297 A CN 85105297A CN 198585105297 A CN198585105297 A CN 198585105297A CN 85105297 A CN85105297 A CN 85105297A CN 85105297 A CN85105297 A CN 85105297A
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- gas
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- hybrid chamber
- ammonia
- probe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0022—General constructional details of gas analysers, e.g. portable test equipment using a number of analysing channels
- G01N33/0024—General constructional details of gas analysers, e.g. portable test equipment using a number of analysing channels a chemical reaction taking place or a gas being eliminated in one or more channels
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- Combustion & Propulsion (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Measure the device of ammonia concentration in the gas sample, wherein constituting of probe: the hybrid chamber that has on the suction side and outlet to survey, the gas that is used for the gas sample is not contained with only containing nitrogen oxide ammonia mixes; Hold the reaction tube of denitrogenation reducing catalyst and do not have the contrast pipe of denitrogenation reducing catalyst, two pipes are contained in the outlet side of hybrid chamber in parallel with each other; A gas piping passes above-mentioned probe, is used for the entrance side of above-mentioned gas delivery that contains nitrogen oxide and do not contain ammonia to hybrid chamber.
Description
The present invention relates to a kind of device of measuring concentration, be used for measuring the concentration of ammonia in the gaseous mixture that contains ammonia and nitrogen oxide gas.
Recently, required the discharging of air-polluting nitrogen oxide gas is controlled.
A kind of method has been arranged, and with removing nitrogen oxide contained in the various waste gas, this method is that oxidation nitrogen is fed nitrogen rejection facility, makes itself and ammonia (NH
3) mix, contact reduction reaction.This method still has a difficult problem, promptly discharges unreacted ammonia (NH
3).Because unreacted NH
3Directly discharge can cause secondary pollution again, adds NH so not only need to measure in nitrogen rejection facility inlet place
3The amount of gas, and need be determined at above-mentioned nitrogen rejection facility exit NH
3The concentration of gas.
Therefore, find a kind of method, can measure NH in the gaseous mixture indirectly
3Concentration.This method is a foundation with the difference of following concentration:
(a) under the condition that has special denitrogenation reducing catalyst to exist, the NH in the above-mentioned gaseous mixture to be measured
3After the NO reaction that initial with it molar equivalent quite waits in the combination gas, the content of remaining NO in this gaseous mixture, with respect to:
B under the condition that does not have catalyzer to exist, NH in the above-mentioned gaseous mixture to be measured
3After having that a part of NO reaction that equates initial molar equivalent with it, the content of remaining NO in this gaseous mixture.
Under every kind of situation, all adopt the method for chemical fluorescence analysis and so on that the gas sample of obtaining is analyzed, the theoretical foundation of analyzing is, under the condition that has above-mentioned special denitrogenation reducing catalyst (hereinafter abbreviating catalyzer as) to exist, will the reaction represented as following equation takes place, this program has introduction in publication number is 42950/1982 Japanese utility model application book, its reaction equation is:
But above-mentioned assay method has a shortcoming: if the concentration of NO is less than NH
3Concentration, do not have remaining NO gas after the reaction, thereby a measuring N H that has no way of
3Concentration.A kind of method is arranged, and is that 182554/1983 Jap.P. is introduced as publication number, can be used as a kind of measure that overcomes above-mentioned shortcoming.The method is will only to contain nitrogen oxide and do not contain NH
3Gas be added in the gaseous mixture to be measured, to improve NO with respect to NH
3Concentration.
Yet this method still has shortcoming: the device that is used for adding the gas that contains nitrogen oxide in gas to be measured is very complicated.Particularly, the above-mentioned device that contains the gas of nitrogen oxide to gas interpolation to be measured is installed on above-mentioned nitrogen rejection facility and the similar devices, this installation process is very complicated.
The present invention can eliminate all above-mentioned shortcomings.Purpose of the present invention is exactly that a kind of compact conformation, device easy for installation will be provided for the concentration of measuring ammonia.
According to ammonia concentration determinator of the present invention, characteristics are, its probe is provided with a hybrid chamber, be used for making gas to be measured with only containing nitrogen oxide and do not contain the mixed gases of ammonia in the chamber, the outlet side and the two tubes of this hybrid chamber join, wherein one is reaction tube, the interior denitrogenation reducing catalyst of containing, another root is the contrast pipe, there is not above-mentioned catalyzer in the pipe, two tubes is parallel to each other, and above-mentioned only contain nitrogen oxide and does not contain the gas of ammonia, imports in the above-mentioned hybrid chamber by a draft tube that runs through described probe.
Fig. 1 is a side cutaway view, and expression is according to the profile of device of the present invention;
Fig. 2 is the cut-open view of another kind of embodiment of the present invention.
Introduce preferred example of the present invention with reference to the accompanying drawings and execute example.
See Fig. 1 earlier, index number 1 is wherein represented the smoke abatement pipeline in nitrogen rejection facility or the similar device, and probe of index number 2 expressions is located in the above-mentioned smoke abatement pipeline 1, and can extends through this smoke abatement pipeline 1.Gas g1 to be measured sucks probe 2 through the sample tap on the probe 22.Be provided with hybrid chamber 3 in this probe 2, be used for making the gas g1 to be measured that filters through filter cleaner 4 to mix with gas g2.Do not contain NH among the gas g2
3And only contain the known nitrogen oxide gas of concentration, hereinafter also to be described (back abbreviates as when mentioning gas g2 and adds gas) to it.The interior shape of above-mentioned hybrid chamber makes air-flow be easy to form turbulent flow therein.In the embodiment shown in fig. 1, two or more cavitys 3a, 3b, 3c are stringing, and 3a and 3b are by narrow
3d is communicated with, and 3b and 3c are by narrow
3e is communicated with.Certainly, many groups also can be set and help sheet on the inwall of above-mentioned hybrid chamber 3.
The endpiece of above-mentioned hybrid chamber 3 is equipped with a reaction tube 6, is filling the catalyzer 5 of cellular or trellis in the pipe, is overlapping contrast pipe 7 in these reaction tube 6 outsides, and pipe 6 is coaxial and parallel with pipe 7.Do not fill out catalyzer 5 in this contrast pipe 7, index number 8 represent a NO analyser, and such as the sort of gas analyzer of being introduced by 4256, No. 964 United States Patent (USP)s, two strands of gases are managed 7 by above-mentioned reaction tube 6 and contrast respectively and entered this analyser 8.
In addition, index number 14 expression well heaters are used for to above-mentioned reaction tube 6, contrast pipe 7 and gas piping 9 heating and insulation.
Instrument for measuring ammonia concentration with above-mentioned structure in use, is sucked gas g1 to be measured by above-mentioned probe 2 through sample tap 2, behind filter cleaner 4 elimination dusts, send into above-mentioned hybrid chamber 3.Be stored in the above-mentioned interpolation gas g2 in the above-mentioned gas bomb 13, also the footpath is by the opposite side input hybrid chamber 3 of gas piping 9 from this probe.The flow of above-mentioned interpolation gas g2 preferably is equal to or less than one of the percentage of the flow of above-mentioned gas g1 to be measured, and makes this flow keep constant.
As mentioned above, the gas g1 to be measured that sucks hybrid chamber 3 fully mixes with above-mentioned interpolation gas g2, and formed combination gas G(is gas g1+ interpolation gas g2 to be measured) concentration through overregulating, the concentration that is remaining NO is higher than NH
3Concentration.Next, when this mixed gas G flows out from above-mentioned hybrid chamber 3, during through above-mentioned reaction tube 6, wherein and NH
3That a part of NO that molar equivalent equates is consumed under the effect of catalyzer 5, makes corresponding N H
3All be reduced.And meanwhile, flow through the combination gas G of contrast pipe 7, NH wherein owing to there is not the effect of catalyzer 5
3And Fails To Respond between the NO.Therefore, can determine NH in the gas to be measured by the difference of NO concentration in two strands of gases of the above-mentioned NO analyser 8 of input
3Content.
Though in above-mentioned device, reaction tube 6 and contrast pipe 7 are coaxial arrangements, gas piping 9 Fork are in the middle of reaction tube 6, but the present invention is not limited only to such arrangement.Everyly can be contained in the layout of the endpiece of hybrid chamber 3 to above-mentioned reaction tube 6 and contrast pipe 7 in mode parallel to each other, everyly can be enclosed within arrangement in the tube wall of probe 2 to gas piping 9 together with reaction tube 6 and contrast pipe 7, can adopt.(as shown in Figure 2).
According to the present invention, in the device of measuring ammonia concentration, a hybrid chamber is set on the probe, the gas that is used for making gas to be measured only contain nitrogen oxide with not containing ammonia mixes within it mutually, at an end of this hybrid chamber, a reaction tube is housed, filling the denitrogenation reducing catalyst in the pipe, a contrast pipe of not filling out denitrification catalyst also is housed, and this two tubes is contained in the outlet side of described hybrid chamber in parallel with each other. Above-mentioned do not contain ammonia and only contain the gas of nitrogen oxide, the entrance side of above-mentioned hybrid chamber is guided to by an appendix that passes this probe in the footpath, thus, and the device that replenishes the gas that contains NO in the gas to be measured is simplified. In order to measure ammonia concentration, must install to above-mentioned probe on nitrogen rejection facility or the similar device.
Claims (2)
1, measure the device of ammonia concentration in the gas sample, comprising a probe, the constituting of this probe:
A, have the hybrid chamber of on the suction side and outlet side, be used for making the above-mentioned gas sample not contain the mixed gases of ammonia with only containing nitrogen oxide;
B, reaction tube are contained the denitrogenation reducing catalyst in the pipe;
C, contrast pipe do not have above-mentioned denitrogenation reducing catalyst in the pipe;
Above-mentioned pipe is parallel to each other, and joins with the outlet side of above-mentioned hybrid chamber;
D, gas piping pass above-mentioned probe, are used for only containing nitrogen oxide and not containing the entrance side of the gas delivery of ammonia to above-mentioned hybrid chamber above-mentioned.
2, device as claimed in claim 1, reaction tube wherein and contrast pipe are installed coaxially to each other.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048650A JPS60192257A (en) | 1984-03-13 | 1984-03-13 | Device for measuring ammonia concentration |
| CN85105297A CN85105297B (en) | 1984-03-13 | 1985-07-10 | Instrument for measuring ammonia concentration |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048650A JPS60192257A (en) | 1984-03-13 | 1984-03-13 | Device for measuring ammonia concentration |
| CN85105297A CN85105297B (en) | 1984-03-13 | 1985-07-10 | Instrument for measuring ammonia concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105297A true CN85105297A (en) | 1987-03-04 |
| CN85105297B CN85105297B (en) | 1988-02-03 |
Family
ID=25741856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105297A Expired CN85105297B (en) | 1984-03-13 | 1985-07-10 | Instrument for measuring ammonia concentration |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS60192257A (en) |
| CN (1) | CN85105297B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529176A (en) * | 2013-10-29 | 2014-01-22 | 杨云生 | Test board capable of dynamic adsorption of ammonia gas |
| US9631224B2 (en) | 2011-11-10 | 2017-04-25 | Human Metabolome Technologies, Inc. | Method for measuring ethanolamine phosphate |
| WO2021129174A1 (en) * | 2019-12-23 | 2021-07-01 | 北京国电龙源环保工程有限公司 | Control system utilizing gas measurement, and application in flue gas denitrification testing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4568054B2 (en) * | 2004-08-11 | 2010-10-27 | 株式会社堀場製作所 | Catalyst unit and analyzer using the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5168291A (en) * | 1974-12-11 | 1976-06-12 | Hitachi Ltd | ANMONIARENZOKUBUNSEKIHOHO NARABINI SOCHI |
| JPS53133327A (en) * | 1977-04-27 | 1978-11-21 | Toshiba Corp | Auto-clear signal generator circuit |
| JPS6242352Y2 (en) * | 1980-07-04 | 1987-10-30 |
-
1984
- 1984-03-13 JP JP59048650A patent/JPS60192257A/en active Granted
-
1985
- 1985-07-10 CN CN85105297A patent/CN85105297B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9631224B2 (en) | 2011-11-10 | 2017-04-25 | Human Metabolome Technologies, Inc. | Method for measuring ethanolamine phosphate |
| US10294509B2 (en) | 2011-11-10 | 2019-05-21 | Human Metabolome Technologies, Inc. | Method for measuring ethanolamine phosphate |
| CN103529176A (en) * | 2013-10-29 | 2014-01-22 | 杨云生 | Test board capable of dynamic adsorption of ammonia gas |
| WO2021129174A1 (en) * | 2019-12-23 | 2021-07-01 | 北京国电龙源环保工程有限公司 | Control system utilizing gas measurement, and application in flue gas denitrification testing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0572547B2 (en) | 1993-10-12 |
| JPS60192257A (en) | 1985-09-30 |
| CN85105297B (en) | 1988-02-03 |
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