CN209910768U - Flue gas SO2Gas metering device for concentration analysis - Google Patents
Flue gas SO2Gas metering device for concentration analysis Download PDFInfo
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- CN209910768U CN209910768U CN201920972481.0U CN201920972481U CN209910768U CN 209910768 U CN209910768 U CN 209910768U CN 201920972481 U CN201920972481 U CN 201920972481U CN 209910768 U CN209910768 U CN 209910768U
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Abstract
The utility model relates to a flue gas SO2The gas metering device for concentration analysis comprises a residual gas collecting mechanism for receiving residual gas led out by a reaction tube, wherein the residual gas collecting mechanism comprises a residual gas collecting bottle filled with aqueous solution, a liquid collecting cup, a thermometer and an electronic scale; one side of the residual gas collecting bottle is provided with a communicating pipe which is communicated with the lower part in the residual gas collecting bottle and is vertically arranged, and the other side of the residual gas collecting bottle is provided with a liquid outlet pipe; the liquid collecting cup is placed on the electronic scale, the cup opening of the liquid collecting cup is positioned below the liquid outlet pipe and used for receiving the water solution discharged by the liquid outlet pipe,wherein the upper end of the communicating pipe is higher than the height of the liquid outlet pipe; the thermometer is arranged at the inner upper part of the residual gas collecting bottle. The utility model discloses detect accurate, easy operation.
Description
Technical Field
The utility model relates to a gas measurement field, specificly relate to a flue gas SO2A gas meter for concentration analysis.
Background
In sulfuric acidProduction system and other production systems with sulfur-containing flue gas (generally, concentration SO)2In the range of 0.1% -30%), staff often need to iodinate SO in flue gas2The concentration is measured and analyzed, and the test principle is as follows: adding reaction liquid, specifically a certain amount of iodine liquid, into a reaction tube, introducing flue gas to be measured through an air inlet pipe, determining that the reaction is just finished through the color change (blue before the reaction and colorless after the reaction) in the reaction tube under the action of taking starch as an indicator, and converting the added amount of iodine into SO removed by reaction2Volume amount, taking the residual gas collection amount (generally 50-1000 mm) at the outlet of the reaction tube as the non-SO in the corresponding flue gas2Volume measured and then SO2Volume/volume (SO)2Volume amount + non SO2Volume amount) to obtain SO in the flue gas2The gas concentration. The schematic diagram of the device is shown in figure 1 of the attached part of the specification, wherein: a1, a reaction tube; a2, an air inlet pipe; a3 and an air outlet pipe; a4, reaction solution; a5, residual gas collecting bottle; a6, water; a7, 1000mm graduated cylinder.
In the process of collecting and metering the reaction residual gas, when an analyst judges that the reaction is just complete, the analyst needs to manually remove the 1000mm measuring cylinder, and the collection of the drainage of the water outlet of the residual gas collecting bottle is stopped; secondly, the volume of collected liquid in the measuring cylinder of 1000mm needs to be read by an analyst through visual inspection; thirdly, the temperature of the residual reaction gas is collected by the analyst according to the ambient temperature; then according to the corresponding SO2The concentration table is used for finding out the SO under the corresponding temperature and residual gas volume conditions2And (4) concentration.
The inaccurate measurement of the volume of the residual gas is easily caused in the three processes of the reaction residual gas collecting and measuring process; in link 1, an analyst has a certain time difference from the time of judging that the reaction is finished to the time of cutting off a measuring cylinder of 1000mm to collect liquid, and a part of liquid continuously flows into the measuring cylinder from a residual gas collecting bottle in the process, so that the liquid collected by the measuring cylinder is larger; secondly, in the link 2, when an analyst reads the volume of the liquid collected in the measuring cylinder, a certain reading error exists; thirdly, in the step 3, the analyst may have a certain error in estimating the ambient temperature, and meanwhile, the analyst may have a certain error in estimating the ambient temperatureThe temperature of the actually collected residual gas in the residual gas collecting bottle has a certain deviation with the room temperature, so that the inaccurate judgment of the temperature of the collected residual gas is easily caused. The deviation of the above 3 links will cause the inaccuracy of residual gas collection and measurement, and the SO is greatly influenced2Accuracy of concentration analysis data.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a flue gas SO2A gas meter for concentration analysis.
In order to solve the technical problem, the technical scheme of the utility model is that:
flue gas SO2The gas metering device for concentration analysis comprises a residual gas collecting mechanism for receiving residual gas led out by a reaction tube, wherein the residual gas collecting mechanism comprises a residual gas collecting bottle filled with aqueous solution, a liquid collecting cup, a thermometer and an electronic scale; one side of the residual gas collecting bottle is provided with a communicating pipe which is communicated with the lower part in the residual gas collecting bottle and is vertically arranged, and the other side of the residual gas collecting bottle is provided with a liquid outlet pipe; the liquid collecting cup is placed on the electronic scale, a cup opening of the liquid collecting cup is positioned below the liquid outlet pipe and used for receiving water solution discharged by the liquid outlet pipe, and the upper end of the communicating pipe is higher than the liquid outlet pipe; the thermometer is arranged at the inner upper part of the residual gas collecting bottle.
Preferably, the upper part of the residual gas collecting bottle is provided with a water replenishing port; and a second rubber plug for plugging the water replenishing port is plugged in the water replenishing port.
Preferably, the upper part of the residual gas collecting bottle is provided with an installation opening for installing a thermometer, and a third rubber plug for plugging the installation opening is plugged in the installation opening; the thermometer vertically penetrates into the third rubber plug, and the temperature measuring end of the thermometer extends into the upper portion of the residual gas collecting bottle through the mounting opening.
Preferably, the height difference between the upper end of the communicating pipe and the liquid outlet pipe is 50 mm.
Compare prior art, the utility model has the advantages that:
the utility model provides a residual air collecting mechanism has realized that residual air collecting bottle goes out liquid duct flowThe automatic flow interruption of the body can accurately collect the volume of reaction residual gas in the analysis process; meanwhile, in the process of reading the volume of the residual gas, the change of the mass reading is weighed by the electronic scale, and the volume of the residual gas collected in the residual gas collecting bottle is accurately read; and the temperature of the residual gas in the residual gas collecting bottle is directly read through the thermometer before table lookup, so that the deviation of artificial temperature estimation is avoided. The measures in the aspects greatly improve the accuracy of residual gas collection and measurement, SO that SO is obtained2The accuracy of concentration measurement provides guarantee.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
fig. 2 is a schematic structural diagram of the present invention.
Reference numerals: 1. a reaction tube; 11. reaction solution; 12. an air inlet pipe; 121. a rubber hose; 13. an air outlet pipe; 14. a liquid inlet; 15. a first rubber stopper; 2. a residual gas collecting mechanism; 21. a residual gas collecting bottle; 211. a water replenishing port; 212. a second rubber stopper; 213. an installation port; 214. a third rubber stopper; 22. a liquid collection cup; 23. a thermometer; 24. an electronic scale; 25. a communication pipe is provided.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.
Example (b):
referring to fig. 2, the present embodiment provides a gas metering device for analyzing the concentration of flue gas SO2, which includes a reaction tube 1 containing a reaction solution 11, an air inlet tube 12 disposed in the reaction tube 1, and a residual gas collecting mechanism 2. The reaction solution 11 is iodine solution and starch is used as an indicator.
Wherein one end of the gas inlet pipe 12 is immersed in the reaction liquid 11, and the other end extends out of the reaction pipe 1; the inner upper part of the reaction tube 1 is communicated with the gas inlet end of the residual gas collecting mechanism 2 through a gas outlet pipe 13; the air inlet end of the air inlet pipe 12 is provided with a section of rubber hose 121, so that the speed of flue gas entering can be controlled by pinching the hose by hand, and the normal operation of the whole device is guaranteed.
The residual gas collecting mechanism 2 comprises a residual gas collecting bottle 21 filled with aqueous solution, a liquid collecting cup 22, a thermometer 23 and an electronic scale 24; one side of the residual gas collecting bottle 21 is provided with a communicating pipe 25 which is communicated with the inner lower part of the residual gas collecting bottle 21 and is vertically arranged, the other side of the residual gas collecting bottle 21 is provided with a liquid outlet pipe 26, the diameter of the liquid outlet pipe 26 is 10mm, and the liquid outlet pipe 26 is also provided with a rubber plug (not shown in the figure) which can plug the pipe orifice of the liquid outlet pipe 26 tightly.
The liquid collecting cup 22 is placed on the electronic scale 24, and the cup mouth of the liquid collecting cup 22 is positioned below the liquid outlet pipe 26 and used for receiving the water solution discharged from the liquid outlet pipe 26, wherein the upper end of the communicating pipe 25 is higher than the height of the liquid outlet pipe 26, and the better scheme is that the height difference between the upper end of the communicating pipe 25 and the liquid outlet pipe 26 is 50 mm; the thermometer 23 is provided at an inner upper portion of the residual gas collecting bottle 21. Meanwhile, the connecting end of the air outlet pipe 13 and the residual air collecting bottle 21 is higher than the upper end of the communicating pipe 25.
The upper part of the reaction tube 1 is provided with a liquid inlet 14 to facilitate the injection of the reaction liquid 11 into the reaction tube 1; the liquid inlet 14 is plugged with a first rubber plug 15 for plugging the liquid inlet 14 so as to ensure the air tightness in the reaction tube 1.
A water replenishing port 211 is arranged at the upper part of the residual gas collecting bottle 21 so as to conveniently inject water into the residual gas collecting bottle 21; a second rubber plug 212 for plugging the water replenishing port 211 is plugged in the water replenishing port 211 so as to ensure the air tightness of the residual air collecting bottle 21.
The upper part of the residual air collecting bottle 21 is provided with an installation opening 213 for installing the thermometer 23, and a third rubber plug 214 for plugging the installation opening 213 is plugged in the installation opening 213; the thermometer 23 vertically penetrates into the third rubber plug 214, the temperature measuring end of the thermometer 23 extends into the upper portion of the residual gas collecting bottle 21 through the mounting port 213, the thermometer 23 penetrates into the third rubber plug 214, the thermometer 23 can be taken out together only by taking out the third rubber plug 214, and the thermometer 23 is convenient to mount and dismount.
The implementation principle is as follows:
the first step is as follows: water is replenished into the residual gas collecting bottle 21 through a water replenishing port 211 until the liquid level in the bottle reaches the upper end of the communicating pipe 25; then the water replenishing port 211 is plugged by a second rubber plug 212; then the air outlet pipe 13 is communicated (the air outlet pipe 13 can adopt a rubber hose 121, and simultaneously the rubber plug of the liquid outlet pipe 26 is pulled out, at the moment, the upper part of the residual gas collecting bottle 21 becomes a closed air cavity, because the height difference between the liquid outlet pipe 26 of the residual gas collecting bottle 21 and the upper end of the communicating pipe 25 is 50mm, after the liquid flows in the liquid outlet pipe 26 in a very small amount, the pressure is reduced due to the increase of the volume of the gas in the air cavity, the pressure balance of the surface of the liquid outlet pipe 26 is realized, under the condition, the liquid outlet pipe 26 automatically stops discharging liquid, at the moment, the reading m1 of the;
the second step is that: introducing flue gas into the reaction tube 1 through the gas inlet pipe 12 for SO2And (3) concentration analysis: after reaction liquid 11 in reaction tube 1 reacts, the residual gas after the reaction can get into residual gas receiving flask 21 through outlet duct 13, because let in gas in the closed air cavity, residual gas receiving flask 21 liquid outlet begins the refluence liquid, when judging that iodine solution just in time reacts and accomplishes in reaction tube 1, analyst pinches off intake pipe 12 of reaction tube 1 (for the convenience the flue gas that pinches off intake pipe 12 gets into, be equipped with one section rubber hose 121 on intake pipe 12), prevent the flue gas entering, residual gas receiving flask 21 gas stop to connect into this moment, drain pipe 26 will be automatic stop at once flowing liquid. At this point, electronic scale 24 reads m 2. The weight g is obtained from m2-m1, namely the volume of the collected reaction residual gas (converted according to the density and the weight g of water).
Meanwhile, the temperature of the residual air collected by the residual air collecting bottle 21 is accurately read from the thermometer 23. Then look-up table is searched to obtain SO of the measured flue gas2And (4) concentration.
Because the residual gas collecting mechanism 2 realizes the automatic cutoff of the fluid of the liquid outlet pipe 26 of the residual gas collecting bottle 21, the volume of the reaction residual gas in the analysis process can be accurately collected; meanwhile, in the residual gas volume reading process, the change of the mass reading is weighed by the electronic scale 24, and the volume of the residual gas collected in the residual gas collecting bottle 21 is accurately read; furthermore, the temperature of the residual air in the residual air collecting bottle 21 is directly read by the thermometer 23 before table lookup, so that the deviation of artificial temperature estimation is avoided. The measures in the aspects greatly improve the accuracy of residual gas collection and measurement, thereby providing guarantee for the accuracy of SO2 concentration measurement.
The above embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the technical scope of the claims.
Claims (4)
1. Flue gas SO2Gas metering device for concentration analysis, including being used for receiving the residual gas that reaction tube (1) derived and collecting mechanism (2), its characterized in that: the residual gas collecting mechanism (2) comprises a residual gas collecting bottle (21) filled with aqueous solution, a liquid collecting cup (22), a thermometer (23) and an electronic scale (24); one side of the residual gas collecting bottle (21) is provided with a communicating pipe (25) which is communicated with the lower part in the residual gas collecting bottle (21) and is vertically arranged, and the other side of the residual gas collecting bottle (21) is provided with a liquid outlet pipe (26); the liquid collecting cup (22) is placed on the electronic scale (24), the cup mouth of the liquid collecting cup (22) is positioned below the liquid outlet pipe (26) and used for receiving water solution discharged by the liquid outlet pipe (26), and the upper end of the communicating pipe (25) is higher than the height of the liquid outlet pipe (26); the thermometer (23) is arranged at the inner upper part of the residual gas collecting bottle (21).
2. The flue gas SO according to claim 12A gas metering device for concentration analysis, characterized in that: a water replenishing port (211) is arranged at the upper part of the residual gas collecting bottle (21); and a second rubber plug (212) for plugging the water replenishing port (211) is plugged in the water replenishing port (211).
3. The flue gas SO according to claim 12A gas metering device for concentration analysis, characterized in that: the upper part of the residual air collecting bottle (21) is provided with an installation opening (213) for installing a thermometer (23), and a third rubber plug (214) for plugging the installation opening (213) is plugged in the installation opening (213); the thermometer (23) is vertically inserted into the third rubber plug (214), and the temperature measuring end of the thermometer (23) extends into the upper part of the residual gas collecting bottle (21) through the mounting opening (213).
4. The method of claim 1Flue gas SO2A gas metering device for concentration analysis, characterized in that: the height difference between the upper end of the communicating pipe (25) and the liquid outlet pipe (26) is 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920972481.0U CN209910768U (en) | 2019-06-26 | 2019-06-26 | Flue gas SO2Gas metering device for concentration analysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920972481.0U CN209910768U (en) | 2019-06-26 | 2019-06-26 | Flue gas SO2Gas metering device for concentration analysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447604A (en) * | 2021-05-28 | 2021-09-28 | 中国石油化工股份有限公司 | Be arranged in simultaneous detection flue gas SO2、SO3Apparatus and method of |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447604A (en) * | 2021-05-28 | 2021-09-28 | 中国石油化工股份有限公司 | Be arranged in simultaneous detection flue gas SO2、SO3Apparatus and method of |
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