CN204188518U - For Benitration reactor the escaping of ammonia on-line measurement device - Google Patents
For Benitration reactor the escaping of ammonia on-line measurement device Download PDFInfo
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- CN204188518U CN204188518U CN201420225592.2U CN201420225592U CN204188518U CN 204188518 U CN204188518 U CN 204188518U CN 201420225592 U CN201420225592 U CN 201420225592U CN 204188518 U CN204188518 U CN 204188518U
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 45
- 238000005259 measurement Methods 0.000 title claims abstract description 43
- 238000005070 sampling Methods 0.000 claims abstract description 82
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- 239000007789 gas Substances 0.000 abstract description 123
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 238000000605 extraction Methods 0.000 abstract description 11
- 230000001788 irregular Effects 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
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- 229910001868 water Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
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- 230000000737 periodic effect Effects 0.000 description 2
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- 108700018263 Brassica oleracea SCR Proteins 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
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- 239000000284 extract Substances 0.000 description 1
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- 239000008398 formation water Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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Abstract
The utility model discloses a kind of for Benitration reactor the escaping of ammonia on-line measurement device, belong to a kind of gas measurement device, described measurement mechanism comprises MO1 sampling unit, MO2 heat air shipping bill unit, M03 vacuum unit and M04 electric control unit, the escaping of ammonia measuring technique is measured by original position the escaping of ammonia mensuration is replaced with the extraction method substantially identical with its principle, directly transferred in follow-up MO2 heat air shipping bill unit by the sample gas of the stopple coupon in M01 sampling unit in line extraction flue and measure, system response time is very fast, can reach level measurement second.Extraction method measurement is extracted from flue by flue gas to be measured, carries out filtering dust process, and advantage maximum is like this by the interference reduction of dust to laser, the stability of great raising system and reliability.And detecting gas pond can adopt stainless-steel tube to make, thus Stability Analysis of Structures, hot irregular deformation can not be there is, laser rays deviation phenomenon can not be caused, cause dropout problem.
Description
Technical field
The utility model relates to a kind of gas measurement device, and in particular, the utility model relates generally to a kind of for Benitration reactor the escaping of ammonia on-line measurement device.
Background technology
Current, along with the denitration transformation of domestic coal-fired power plant is carried out on a large scale, current domestic coal-fired power plant denitration major processes is that denitrating technique is proved to be to apply at most and denitration efficiency is the highest, denitration technology the most ripe, is one of coal steam-electric plant smoke denitration mainstream technology of advanced person in the world at present for selective catalytic reduction (Selective Catalytic Reduction abbreviation SCR method).Ammonia is sprayed in the flue gas of power plant boiler fire coal generation; Flue gas containing NH3 (gas) is contained the reactor of special-purpose catalyst by one; Under the effect of catalyzer, the NH3 (gas) sprayed into reacts with NOx, the NOx conversion in flue gas is become the processes such as H2O and N2, denitration efficiency >=90%, in technological process, have a small amount of ammonia to have neither part nor lot in reduction reaction, will go out SCR denitration reactor outlet and escape out, the ammonia of this part is called escape ammonia (being also the escaping of ammonia), according to the general designing requirement of industry, under nominal situation, SCR the escaping of ammonia is less than 3PPM, or makes escape ammonia concentration be less than 3PPM.Under general clear condition, the running parameter of SCR denitration reactor outlet is as follows:
1 gaseous state SO2 is greater than 2000PPm;
2 gaseous state S03 are greater than 20PPm;
Between 3 water vapour volume ratios 3% to 5%;
Between 4 flue-gas temperatures 260 DEG C to 380 DEG C;
Between 5 dust content 30g/Nm3 to 50g/Nm3;
6 flue working pressure tiny structure;
6 flue structures are rectangle steel structure flue, and long * high size is at 6000*8000(mm) more than;
6 flue gas flow rates are at 5 to 15 meter per seconds;
On the whole, high dust-laden, high temperature, high-moisture and have certain corrosive gas, working environment high temperature to be measured, vibration, outdoor environment is belonged to.
Measure the On-line Measuring Method of the escaping of ammonia at present both at home and abroad, be mainly TDLAS laser in-situ mensuration, (TDLAS is the abbreviation of Tunable Diode Laser Absorption Spectroscopy).Translator of Chinese is tunable diode laser absorption spectroscopy, and this technology mainly utilizes the narrow linewidth of semiconductor laser with tunable and wavelength to realize measuring the single of molecule or the very near very indistinguishable Absorption Line of several distance with the characteristic that Injection Current changes.The feature of the online TDLAS technology of laser in-situ is: analytical instrument is directly installed on measure field, realizes on-the-spot on-line gas analysis by a branch of laser beam through tested gas.TDLAS technology can realize the automatic detection of multiple gases as CO, CO2, O2, HF, HCl, CH4, NH3, H20, H2S, HCN, C2H2, C2H4 etc., is applicable to the multiple fields such as iron and steel, metallurgy, petrochemical industry, environmental protection, biochemistry, space flight.But national conditions both domestic and external are different, the case of laser in-situ on-line measurement generating plant escape ammonia in American-European countries seldom and very rare, main cause is that coal-fired power plant of American-European countries denitration engineering the escaping of ammonia is detected as discontinuous on-line measurement, for regularly extracting check measurement.China's generating plant escape ammonia be measured as continuous on-line measurement.
Current, along with the extensive denitration in domestic power station is engineered, the technology that application TDLAS technology carries out the escaping of ammonia of original position Method for Installation measurement power station Benitration reactor is more, from current engineering practice, the following shortcoming of ubiquity: one is that before SCR denitration reactor is arranged in fly-ash separator simultaneously, therefore SCR denitration reactor outlet dust content is very high because the high ash content of the many burnings of coal-fired power plant of China is coal-fired, between 30g/Nm3 to 50g/Nm3, belong to high ash-laden gas.The field flue gas smoke contents such as metallurgy, iron and steel, chemical industry that compare are high a lot.Laser passed treats test sample gas, produces a large amount of light refractions and diffuse reflection, has had a strong impact on laser piercing power, cause laser light transmission rate low, therefore causes measured deviation large, even can measure out.Two is that generating plant Benitration reactor exhaust pass sectional dimension is larger, and be steel construction flue, install under unit cold conditions industrial and mineral, after unit commitment runs, flue temperature raises, and flue has irregular deformation, because cause laser beam to depart from original cold conditions route, cause laser signal to be lost, thus cause measuring error or measure no signal.Three is because TDLAS laser instrument needs periodic calibrating, otherwise working time one is long, can cause data wander.Timing signal needs to demarcate after field stripping, because local communication cable and optical cable are closed in online box, demarcates very difficult, substantially cannot realize periodic calibrating.Therefore, past 2 years practice situation, the online Laser analysis of original position carries out the escaping of ammonia and is not too suitable for coal-fired power plant, cannot solve above-mentioned three large problems.For this reason, we propose to adopt fume extraction method to carry out escape ammonia measurement.
Utility model content
One of the purpose of this utility model is for above-mentioned deficiency, there is provided a kind of for Benitration reactor the escaping of ammonia on-line measurement device, cause measured deviation large to expect to solve the high dustiness because of flue gas directly adopting laser in-situ to measure ammonia existence in prior art, irregular deformation because of flue causes laser beam to depart from original cold conditions route causing laser signal to lose, and device laser measuring apparatus demarcates the technical matterss such as difficulty.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
One provided by the utility model is used for Benitration reactor the escaping of ammonia on-line measurement device, and described measurement mechanism comprises:
MO1 sampling unit, comprise sampling cavity, the front end of described sampling cavity is provided with stopple coupon, described stopple coupon is connected with sampling cavity, the inside of described sampling cavity is also provided with for filtering the grade one filter being introduced sample gas by stopple coupon, described sampling cavity is also connected with heat air cabin by the hot sampling line of companion, transfers to heat air cabin for the sample gas after being filtered first time;
MO2 heat air shipping bill unit, comprise heat air cabin, the inside in described heat air cabin is provided with the secondary filter for filtering the sample gas coming from MO1 sampling unit, described secondary filter is also by pipeline access remittance gas row, described remittance gas row is connected with detection gas pond by pipeline, the two ends in described detection gas pond are separately installed with transmitting terminal and the receiving end of laser detector, and detection gas pond is also connected with drain cooler by pipeline, for being detected the ammonia level in current sample gas by laser detector; The inside in described heat air cabin is also provided with heating forces air circulating system, for maintaining the temperature of inside, heat air cabin;
M03 vacuum unit, comprises drain cooler, and described drain cooler is connected with hydrophobic evacuation port by pipeline, and the pipeline between described drain cooler and hydrophobic evacuation port is provided with the 8th solenoid valve; Described drain cooler is also connected with vacuum pump by pipeline, pipeline between described vacuum pump and drain cooler is also provided with the 6th solenoid valve, for by vacuum pump detecting gas pond, converge the pipeline conducting each other of gas row, secondary filter, sampling cavity and grade one filter time, make detection gas pond, converge gas row, secondary filter, sampling cavity and grade one filter inside form negative pressure of vacuum, thus make sample gas enter MO1 sampling unit successively and MO2 heat air shipping bill is first.
As preferably, further technical scheme is: the outside of described sampling cavity is also provided with heating arrangement, for maintaining the temperature of the sample gas of sampling cavity inside.
Further technical scheme is: also comprise blowback subelement in described MO1 sampling unit, well heater is provided with in described blowback subelement, described well heater is connected with sampling cavity respectively by two-way pipeline, and two-way pipeline is separately installed with the first solenoid valve and the second solenoid valve, wherein the outlet of a road pipeline is placed near grade one filter, and the outlet of another pipeline is placed in the rear end of grade one filter; Described grade one filter and accompany between hot sampling line and be also provided with pneumatic shut-off valve, described pneumatic shut-off valve, by the total door of gas source pipe access pressurized air, described gas source pipe is provided with the 3rd solenoid valve; Heat for making the pressurized air coming from the total door of pressurized air enter in well heater in the process of sampling cavity blowback, entered in sampling cavity by the two-way pipeline between well heater and sampling cavity again after heating simultaneously and complete blowback, and provide the power of open and close to pneumatic shut-off valve by the total door of pressurized air.
Further technical scheme is: described secondary filter and converge gas arrange between pipeline on variable valve, high-temperature stream gauge and non-return valve are installed successively; Described remittance gas row is connected with the sample gas inlet detecting gas pond by pipeline.
Further technical scheme is: described aflter-fillter is three that install side by side, and is connected with sampling cavity by the hot sampling line of companion; Described remittance gas row is also connected with gas entrance by pipeline, and the pipeline between described remittance gas row and gas entrance is provided with the 9th solenoid valve; Described remittance gas row be also connected by the total door of pipeline and pressurized air, the total door of described pressurized air and remittance gas arrange between pipeline on the 4th solenoid valve is installed; The total door of described pressurized air and converge gas arrange between pipeline also extended near the transmitting terminal of laser detector by the first bypass line, and be connected with hot gas cabin simultaneously, described first bypass line is provided with the 5th solenoid valve, for providing instrument cooling air to the transmitting terminal of laser detector; Described hot gas cabin also extends near the receiving end of laser detector by pipeline, for providing instrument cooling air to the receiving end of laser detector.
Further technical scheme is: described detection gas pond is also provided with thermal resistance and pressure vacuum gauge, for measuring the temperature and pressure that detect the inner sample gas in gas pond, pipeline between described remittance gas row and gas entrance is also parallel with the second bypass line, and described second bypass line is provided with the first Manual drain valve.
Further technical scheme is: also comprise appendage vacuum pump in described M03 vacuum unit, described appendage vacuum pump is connected with drain cooler by pipeline, and pipeline between appendage vacuum pump and drain cooler is provided with the 7th solenoid valve.
Further technical scheme is: the pipeline between described drain cooler and vacuum pump, appendage vacuum pump is also provided with adjusting needle valve and temperature flow gauge; Pipeline between described drain cooler and hydrophobic evacuation port is also parallel with the 3rd bypass line, and described 3rd bypass line is provided with the second Manual drain valve.
Further technical scheme is: described measurement mechanism also comprises M04 electric control unit, described first solenoid valve, the second solenoid valve, the 3rd solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the 7th solenoid valve, the 8th solenoid valve, the 9th solenoid valve all access M04 electric control unit, for by the open and close of M04 electric control unit according to different each solenoid valve of working state control of measurement mechanism.
Further technical scheme is: described detection gas pond is stainless-steel tube, and the end of stainless-steel tube is provided with the flange arrangement for the transmitting terminal and receiving end installing laser detector.
Compared with prior art, one of the beneficial effects of the utility model are: measure the escaping of ammonia measuring technique by original position the escaping of ammonia mensuration is replaced with the extraction method substantially identical with its principle, directly transferred in follow-up MO2 heat air shipping bill unit by the sample gas of the stopple coupon in M01 sampling unit in line extraction flue and measure, system response time is very fast, can reach level measurement second.Extraction method measurement is extracted from flue by flue gas to be measured, carries out filtering dust process, and advantage maximum is like this by the interference reduction of dust to laser, the stability of great raising system and reliability.And detecting gas pond can adopt stainless-steel tube to make, thus Stability Analysis of Structures, hot irregular deformation can not be there is, laser rays deviation phenomenon can not be caused, cause dropout problem.One provided by the utility model is simple for Benitration reactor the escaping of ammonia on-line measurement apparatus structure simultaneously, split type cellular construction is conducive to the later stage and demarcates laser detecting apparatus, all kinds of Benitration reactor can be installed on and carry out ammonia on-line checkingi, and the especially suitable the escaping of ammonia pick-up unit as generating plant SCR denitration reactor outlet.
Accompanying drawing explanation
Fig. 1 is the structural representation for illustration of the utility model embodiment;
Fig. 2 is the main flow figure that in the utility model embodiment, extraction method measures the escaping of ammonia measuring technique;
In figure, 1 is MO1 sampling unit, 101 is sampling cavity, 102 is stopple coupon, 103 is grade one filter, 2 is MO2 heat air shipping bill unit, 201 is heat air cabin, 202 is secondary filter, 203 for converging gas row, 204 for detecting gas pond, 205 is the transmitting terminal of detecting device, 206 is the receiving end of detecting device, 207 is variable valve, 208 is high-temperature stream gauge, 209 is non-return valve, 210 is the 9th solenoid valve, 211 is the 4th solenoid valve, 212 is the first bypass line, 213 is the 5th solenoid valve, 214 is thermal resistance, 215 is pressure vacuum gauge, 216 is the second bypass line, 217 is the first Manual drain valve, 3 is M03 vacuum unit, 301 is drain cooler, 302 is hydrophobic evacuation port, 303 is the 8th solenoid valve, 304 is vacuum pump, 305 is the 6th solenoid valve, 306 is appendage vacuum pump, 307 is adjusting needle valve, 308 is the 3rd bypass line, 309 is the second Manual drain valve, 310 is the 7th solenoid valve, 31 is blowback subelement, 311 is well heater, 312 is the first solenoid valve, 313 is the second solenoid valve, 314 is pneumatic shut-off valve, 315 is gas source pipe, 316 is the 3rd solenoid valve, 4 is M04 electric control unit, 5 is the total door of pressurized air, 6 is gas entrance.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
Shown in figure 1, an embodiment of the present utility model is a kind of for Benitration reactor the escaping of ammonia on-line measurement device, and in the present embodiment, this measurement mechanism comprises:
MO1 sampling unit 1, comprise sampling cavity 101, the front end of described sampling cavity 101 is provided with stopple coupon 102, described stopple coupon 102 is connected with sampling cavity 101, the inside of described sampling cavity 101 is also provided with for filtering the grade one filter 103 being introduced sample gas by stopple coupon 102, described sampling cavity 101 is also connected with heat air cabin 201 by the hot sampling line 104 of companion, transfers to heat air cabin 201 for the sample gas after being filtered first time; The effect of hot sampling line 104 is accompanied to be avoid sample gas temperature in transmitting procedure to reduce; The filtering accuracy of aforementioned grade one filter 103 is preferably 2 microns;
MO2 heat air shipping bill unit 2, comprise heat air cabin 201, the inside in described heat air cabin 201 is provided with the secondary filter 202 for filtering the sample gas coming from MO1 sampling unit 1, described secondary filter 202 is also by pipeline access remittance gas row 203, described remittance gas row 203 is connected with detection gas pond 204 by pipeline, the two ends in described detection gas pond 204 are separately installed with transmitting terminal 205 and the receiving end 206 of laser detector, and detection gas pond 204 is also connected with drain cooler 301 by pipeline, for being detected the ammonia level in current sample gas by laser detector; The inside in described heat air cabin 201 is also provided with heating forces air circulating system, for maintaining the temperature of inside, heat air cabin 201; The filtering accuracy of said second filtrator 202 is 0.1 microns;
M03 vacuum unit 3, comprises drain cooler 301, and described drain cooler 301 is connected with hydrophobic evacuation port 302 by pipeline, and the pipeline between described drain cooler 301 and hydrophobic evacuation port 302 is provided with the 8th solenoid valve 303; Described drain cooler 301 is also connected with vacuum pump 304 by pipeline, pipeline between described vacuum pump 304 and drain cooler 301 is also provided with the 6th solenoid valve 305, for by vacuum pump 304 detecting gas pond 204, the gas that converges arranges 203, the pipeline conducting each other of secondary filter 202, sampling cavity 101 and grade one filter 103 time, detection gas pond 204, remittance gas row 203, secondary filter 202, sampling cavity 101 is made to form negative pressure of vacuum with the inside of grade one filter 103, thus make sample gas enter MO1 sampling unit and MO2 heat air shipping bill unit 2 successively.
Shown in composition graphs 2, in the present embodiment, the main flow that extraction method measures the escaping of ammonia measuring technique is that first flue gas to be measured extracts through the stopple coupon of M01 sampling unit, complete one-level smoke filtration at M01 sampling unit, then through high temperature heat tracing pipe (companion's hot temperature degree 180 DEG C), carry out M02 heat air shipping bill unit, in M02 heat air shipping bill unit, heat air shipping bill unit mainly completes cascade filtration, confluxes, and enters the detection air chamber of heating unit.Wherein heating unit effect to treat that test sample temperature degree remains on about 220 DEG C.Then treat that test sample gas enters M03 vacuum unit, the main sample gas cooling of vacuum unit, gas dewater, and enter vacuum pump, then enter in air.
According in another embodiment of the present utility model, for avoiding NH
3be dissolved in pipeline condensate water, the outside of sampling cavity 101 is also provided with heating arrangement, for maintaining the temperature of the sample gas of sampling cavity 101 inside, preferably makes sample gas maintain 180 degrees centigrade all the time.
Shown in Fig. 1, in the embodiment that the utility model is more preferably for technical solution problem, too much gas sample is affected for avoiding the dust in M01 sampler, also blowback subelement 31 can be set up in MO1 sampling unit, well heater 311 is provided with in this blowback subelement 31, this well heater preferably adopts cast aluminium electric heater, and this well heater 311 is connected with sampling cavity 101 respectively by two-way pipeline, and on two-way pipeline, be separately installed with the first solenoid valve 312 and the second solenoid valve 313, wherein the outlet of a road pipeline is placed near grade one filter 103, the outlet of another pipeline is placed in the rear end of grade one filter 103, described grade one filter 103 and accompany between hot sampling line 104 and be also provided with pneumatic shut-off valve 314, described pneumatic shut-off valve 314 accesses the total door 5 of pressurized air by gas source pipe 315, described gas source pipe 315 is provided with the 3rd solenoid valve 316, enter in well heater 311 for making the pressurized air coming from the total door 5 of pressurized air in the process of sampling cavity 101 blowback and heat, entered in sampling cavity 101 by the two-way pipeline between well heater 311 and sampling cavity 101 again after heating simultaneously and complete blowback, and provide the power of open and close to pneumatic shut-off valve 314 by the total door of pressurized air 5.
Further, for making the adjustability of gas coming through in MO2 heat air shipping bill unit 2, the pipeline also can arrange between 203 at secondary filter 202 and the gas that converges being provided with this variable valve of variable valve 207(successively and preferably adopting adjusting needle valve), high-temperature stream gauge 208 and non-return valve 209; Described remittance gas row 203 is connected with the sample gas inlet detecting gas pond 204 by pipeline.And the efficiency of the sample gas for increase cascade filtration, also can be set to three that install side by side by above-mentioned secondary filter 202, and be connected with sampling cavity 101 by the hot sampling line 104 of companion; Described remittance gas row 203 is also connected with gas entrance 6 by pipeline, and the pipeline between described remittance gas row 203 and gas entrance 6 is provided with the 9th solenoid valve 210; Described remittance gas row 203 is also connected by the total door 5 of pipeline and pressurized air, and the total door 5 of described pressurized air and the gas that converges are arranged on the pipeline between 203 and is provided with the 4th solenoid valve 211; The total door 5 of described pressurized air and the gas pipeline arranged between 203 that converges also extend near the transmitting terminal 205 of laser detector by the first bypass line 212, and be connected with heat air cabin 201 simultaneously, described first bypass line 212 is provided with the 5th solenoid valve 213, provides instrument cooling air for the transmitting terminal 205 to laser detector; Described heat air cabin 201 is also extended to by pipeline near the receiving end 206 of laser detector, provides instrument cooling air for the receiving end 206 to laser detector.
The above-mentioned pipeline be communicated with the total door of pressurized air 5 also can set up reduction valve to regulate compressed-air actuated pressure, and guarantee is that the elder brother's unit in device normally runs.
Preferably, above-mentioned detection gas pond 204 is also provided with thermal resistance 214 and pressure vacuum gauge 215, for measuring the temperature and pressure that detect the inner sample gas in gas pond 204, pipeline between described remittance gas row 203 and gas entrance 6 is also parallel with the second bypass line 216, and described second bypass line 216 is provided with the first Manual drain valve 217.And detect gas pond 204 and preferably adopt stainless-steel tube, and the end of stainless-steel tube is provided with the flange arrangement for the transmitting terminal 205 with receiving end 206 installing laser detector.As Stability Analysis of Structures behind detection gas pond 204, hot irregular deformation can not be there is, laser rays deviation phenomenon can not be caused, cause dropout problem in stainless-steel tube.
For the reliability and stability of unit vacuum state each in assurance device, in another embodiment of the present utility model, an appendage vacuum pump 306 can be set up again in M03 vacuum unit 3, and be connected with drain cooler 301 by pipeline by this appendage vacuum pump 306, and pipeline between appendage vacuum pump 306 and drain cooler 301 is provided with the 7th solenoid valve 310.
On the other hand, be the adjustability increasing M03 vacuum unit, the pipeline between drain cooler 301 and vacuum pump 304, appendage vacuum pump 306 can install adjusting needle valve 307 and temperature flow gauge 311; And pipeline the 3rd bypass line 308 in parallel between drain cooler 301 with hydrophobic evacuation port 302, the 3rd bypass line 308 is installed the second Manual drain valve 309.
Mention as above-described embodiment, multiple solenoid valve is have employed in device, and from the function of solenoid valve, it can realize the state of open and close according to logic control, therefore M04 electric control unit 4 can also be set up in the measurement mechanism in above-described embodiment, and by above-mentioned first solenoid valve 312, second solenoid valve 313, 3rd solenoid valve 316, 4th solenoid valve 211, 5th solenoid valve 213, 6th solenoid valve 305, 7th solenoid valve 310, 8th solenoid valve 303, 9th solenoid valve 210 all accesses M04 electric control unit 4, for by the open and close of M04 electric control unit 4 according to different each solenoid valve of working state control of measurement mechanism, such as realize sample gas on-line checkingi, blowback is swept and the functions such as calibrate.
Coupling apparatus realizes the concrete steps that extraction method measures the escaping of ammonia measuring technique more below, is described further the measurement mechanism structure described in this above-mentioned several embodiment:
The effect of sampling unit samples from flue, treats that test sample gas is under vacuum system effect, is extracted out through stopple coupon by flue, enters sampling cavity, and sampling cavity is arranged by filtrator, and most dust is filtered in sampling cavity at this.The rear gas of filtration enters high temperature through pneumatic stopping valve PV1 and accompanies hot sampling line to enter M02 heat air shipping bill unit.
And in order to prevent dust stratification from too much resulting in blockage, sampling unit has blowing function, and by the pressurized air filtered (pressure about 6bar) through well heater 331, air themperature is increased to about 180 DEG C, enter 312 through the first solenoid valve and enter sampling cavity, the dust stratification of sampling cavity is blown back flue.After heating up, pressurized air carries out opposite direction purging through the second solenoid valve to the filter core of grade one filter 103 simultaneously, purges dust in filter core to flue.Entering M02 heat air shipping bill unit below to prevent from purging rear pressurized air, keeping purging pressure simultaneously, a pneumatic shut-off valve 314 being set, providing control source of the gas by the 3rd solenoid valve 316.When opening at the first solenoid valve 312 and the second solenoid valve 313, sampling unit enters purging state, and now the 3rd solenoid valve 316 is opened, and pneumatic pipeline section valve 314 cuts out.
Under normal circumstances, sampling unit often works 1 hour, blowback 5 minutes.Normal serial sampling, each equipment state is as follows:
1) the first solenoid valve 312, second solenoid valve 313, the 3rd solenoid valve 316, the 4th solenoid valve 211 closed condition;
2) the 8th solenoid valve, the 9th closed electromagnetic valve;
3) vacuum pump 304 or appendage vacuum pump 306 run in turn;
A) the 6th solenoid valve 305 of vacuum pump 304 entrance is opened and is run with vacuum pump 304, and entrance for subsequent use 7th solenoid valve 310 cuts out and appendage vacuum pump 306 stops;
B) appendage vacuum pump 306 entrance the 7th solenoid valve is opened and to be run with appendage vacuum pump 306 and vacuum pump 304 entrance the 6th closed electromagnetic valve and vacuum pump 304 stop;
4) the first Manual drain valve 217 is closed, the first Manual drain valve 309 closes;
5) the pneumatic shut-off valve 314 of sampling unit is opened;
In automatic blowing process, the state of each solenoid valve and other valves is as follows:
In opened condition, steam trap drain solenoid valve EV8 opens for outer blowback first solenoid valve 3012, second solenoid valve 313, the 3rd solenoid valve 316, the 4th solenoid valve 211;
9th solenoid valve 210 of the 6th solenoid valve 305 of vacuum pump 304, the 7th solenoid valve 310 of appendage vacuum pump 306, gas entrance cuts out;
First Manual drain valve 217 is closed, the second Manual drain valve 309 is closed;
Vacuum pump 304 is all out of service with appendage vacuum pump 306;
Pneumatic shut-off valve 314 cuts out.
Manual purging state is as follows:
First solenoid valve 312, second solenoid valve 313, the 3rd solenoid valve 316 are opened;
The 4th solenoid valve detecting gas pond is closed condition, the 8th closed electromagnetic valve of drain cooler 301;
9th closed electromagnetic valve of the 6th solenoid valve of vacuum pump 304, the 7th solenoid valve of appendage vacuum pump 306, gas entrance;
First Manual drain valve 217 is closed, the second Manual drain valve 309 is closed;
Vacuum pump 304 is all out of service with appendage vacuum pump 306;
Pneumatic shut-off valve 314 cuts out.
M02 heat air shipping bill unit in the course of work of pick-up unit serial sampling is: sample gas after sampling unit filters, heat air cabin 201 is entered by accompanying hot sampling line, first secondary filter 202 is entered, then inserting needle type flow control valve, through high-temperature stream gauge, enter non-return valve, enter remittance gas row, enter and detect gas pond.
The size detecting gas pond is preferably as length 800mm diameter 40mm Stainless Steel 316L tubular structure, and there is plain flange both sides.Detecting gas pond is the core component of this unit, and it is designed to side air inlet, and give vent to anger in side in addition.Detect gas pond and be provided with measurement gas temperature thermal resistance and tensimeter, for measuring the pressure and temperature of measured gas.Heat air cabin is designed with electrical heating and forces air circulating system, keeps overall gas cabin internal temperature to be about 220 DEG C.Gas detects gas pond in heat air cabin, completes NH in gas
3measurement.
M03 vacuum unit in the course of work of pick-up unit serial sampling is: through detecting the sample gas in gas pond, through connecting line, enter vacuum unit, due to sample temperature degree higher (about 220 DEG C) with containing a large amount of water vapours, first enter hydrophobic cooling, carry out radiating and cooling and dewater.The effect of drain cooler reduces sample temperature degree, and temperature degree is reduced to less than 50 DEG C.The condensate water formed in temperature-fall period, is left to the bottom of steam trap through tube wall.In sampling unit purge, by opening the 4th solenoid valve and the 8th solenoid valve, under compressed-air actuated effect, condensate water is blown.
Vacuum unit is designed with two vacuum diaphragm pumps, under normal serial sampling operating mode, is controlled the switching of vacuum pump operation and corresponding valve by the PLC in M04 electric control unit.
The calibration process of pick-up unit is: the calibrating gas coming from gas entrance 6 can enter remittance gas row 203 by the first Manual drain valve 217 or the 9th solenoid valve 210, then enter and detect gas pond 204, then gas enters drain cooler 301 discharge through the 8th solenoid valve 303 through detecting gas pond 204.
In calibration process, the state of each solenoid valve and other valves is as follows:
1) the first solenoid valve 312, second solenoid valve 313, the 3rd solenoid valve 316, the 4th solenoid valve 211, the 5th solenoid valve 213, the 6th solenoid valve 305, the 7th solenoid valve 310 are closed;
2) the 9th solenoid valve 210 is opened, the 8th solenoid valve 303 opens;
3) the first Manual drain valve 217 and the second Manual drain valve 309 are closed;
4) vacuum pump 304 is out of service with appendage vacuum pump 306;
5) heating in heat air cabin 201 forces the power supply of air circulating system to disconnect;
Than that described above, the utility model also has following features:
One, flue gas filter dirt process, native system is designed with two-stage dust treatment system, grade one filter and secondary filter, and grade one filter filter core is porcelain filter or the metal sintering web filter of 2 microns, and secondary filter filter core is the porcelain filter of 0.1 micron.
Two, in extraction process, before gas detect air chamber, whole section of flue gas process process keeps the condition of high temperature, and whole process remains between 180 DEG C to 240 DEG C, and the ammonia that the condensation formation water droplet of the water vapour avoided brings is dissolved in water problem.Also avoid NH simultaneously
3with SO
3, H
20 reaction generates NH
4hSO
4bring ammonium salt crystallization and adhesion problem.
In the unit of three, pick-up unit, entirety is micro-vacuum state, therefore high reliability is designed and the vacuum system of long-term stability very important, the vacuum system of vacuum diaphragm pump group as native system of two cover parallel runnings is adopted in vacuum unit, an operation, one for subsequent use, carries out by control system the reliability that regular switching mode carrys out keeping system.
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also drop in scope of the present utility model to realize this feature, structure or feature in conjunction with other embodiments.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (10)
1., for a Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that described measurement mechanism comprises:
MO1 sampling unit (1), comprise sampling cavity (101), the front end of described sampling cavity (101) is provided with stopple coupon (102), described stopple coupon (102) is connected with sampling cavity (101), the inside of described sampling cavity (101) is also provided with for filtering the grade one filter (103) being introduced sample gas by stopple coupon (102), and described sampling cavity (101) is also connected with heat air cabin (201) by the hot sampling line of companion (104);
MO2 heat air shipping bill unit (2), comprise heat air cabin (201), the inside of described heat air cabin (201) is provided with for filtering the secondary filter (202) coming from the sample gas of MO1 sampling unit (1), described secondary filter (202) is also by pipeline access remittance gas row (203), described remittance gas row (203) is connected with detection gas pond (204) by pipeline, the two ends of described detection gas pond (204) are separately installed with the transmitting terminal (205) of laser detector and receiving end (206), and detection gas pond (204) is also connected with drain cooler (301) by pipeline,
M03 vacuum unit (3), comprise drain cooler (301), described drain cooler (301) is connected with hydrophobic evacuation port (302) by pipeline, and the pipeline between described drain cooler (301) and hydrophobic evacuation port (302) is provided with the 8th solenoid valve (303); Described drain cooler (301) is also connected with vacuum pump (304) by pipeline, the pipeline between described vacuum pump (304) and drain cooler (301) is also provided with the 6th solenoid valve (305).
2. according to claim 1 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: the outside of described sampling cavity (101) is also provided with heating arrangement.
3. according to claim 2 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: in described MO1 sampling unit, also comprise blowback subelement (31), well heater (311) is provided with in described blowback subelement (31), described well heater (311) is connected with sampling cavity (101) respectively by two-way pipeline, and two-way pipeline is separately installed with the first solenoid valve (312) and the second solenoid valve (313), wherein the outlet of a road pipeline is placed near grade one filter (103), the outlet of another pipeline is placed in the rear end of grade one filter (103), between described grade one filter (103) and the hot sampling line of companion (104), pneumatic shut-off valve (314) is also installed, described pneumatic shut-off valve (314), by gas source pipe (315) the access total door of pressurized air (5), described gas source pipe (315) is provided with the 3rd solenoid valve (316).
4. according to claim 3 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: described secondary filter (202) and the gas that converges are arranged on the pipeline between (203) and is provided with variable valve (207), high-temperature stream gauge (208) and non-return valve (209) successively; Described remittance gas row (203) is connected with the sample gas inlet detecting gas pond (204) by pipeline.
5. according to claim 4 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: described secondary filter (202) is three that install side by side, and be connected with sampling cavity (101) by the hot sampling line of companion (104); Described remittance gas row (203) is also connected with gas entrance (6) by pipeline, and the pipeline between described remittance gas row (203) and gas entrance (6) is provided with the 9th solenoid valve (210); Described remittance gas row (203) is also connected by the total door of pipeline and pressurized air (5), and the total door of described pressurized air (5) and the gas that converges are arranged on the pipeline between (203) and is provided with the 4th solenoid valve (211); The pipeline that the total door of described pressurized air (5) and the gas that converges are arranged between (203) also extends near the transmitting terminal (205) of laser detector by the first bypass line (212), and be connected with heat air cabin (201), described first bypass line (212) is provided with the 5th solenoid valve (213); simultaneously Described heat air cabin (201) is also extended to by pipeline near the receiving end (206) of laser detector.
6. according to claim 5 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: described detection gas pond (204) is also provided with thermal resistance (214) and pressure vacuum gauge (215), pipeline between described remittance gas row (203) and gas entrance (6) is also parallel with the second bypass line (216), and described second bypass line (216) is provided with the first Manual drain valve (217).
7. according to claim 6 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: in described M03 vacuum unit (3), also comprise appendage vacuum pump (306), described appendage vacuum pump (306) is connected with drain cooler (301) by pipeline, and pipeline between appendage vacuum pump (306) and drain cooler (301) is provided with the 7th solenoid valve (310).
8. according to claim 7 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: the pipeline between described drain cooler (301) and vacuum pump (304), appendage vacuum pump (306) is also provided with adjusting needle valve (307) and temperature flow gauge (311); Pipeline between described drain cooler (301) and hydrophobic evacuation port (302) is also parallel with the 3rd bypass line (308), and described 3rd bypass line (308) is provided with the second Manual drain valve (309).
9. according to claim 8 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: described measurement mechanism also comprises M04 electric control unit (4), described first solenoid valve (312), second solenoid valve (313), 3rd solenoid valve (316), 4th solenoid valve (211), 5th solenoid valve (213), 6th solenoid valve (305), 7th solenoid valve (310), 8th solenoid valve (303), 9th solenoid valve (210) all accesses M04 electric control unit (4), for by the open and close of M04 electric control unit (4) according to different each solenoid valve of working state control of measurement mechanism.
10. according to claim 1 for Benitration reactor the escaping of ammonia on-line measurement device, it is characterized in that: described detection gas pond (204) is stainless-steel tube, and the end of stainless-steel tube is provided with the flange arrangement of transmitting terminal (205) for installing laser detector and receiving end (206).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420225592.2U CN204188518U (en) | 2014-05-05 | 2014-05-05 | For Benitration reactor the escaping of ammonia on-line measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420225592.2U CN204188518U (en) | 2014-05-05 | 2014-05-05 | For Benitration reactor the escaping of ammonia on-line measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN204188518U true CN204188518U (en) | 2015-03-04 |
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ID=52620501
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007072A (en) * | 2014-05-05 | 2014-08-27 | 贾金柱 | Escaped-ammonia on-line measure apparatus for denitration reactor |
| CN105067553A (en) * | 2015-08-14 | 2015-11-18 | 安徽蓝盾光电子股份有限公司 | Heat tracing tank based high-precision FTIR (Fourier transform infrared spectroscopy) online measurement system for flue gas |
| CN106526092A (en) * | 2016-12-27 | 2017-03-22 | 吉林省电力科学研究院有限公司 | Automatic calibration system for ammonia escape |
-
2014
- 2014-05-05 CN CN201420225592.2U patent/CN204188518U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007072A (en) * | 2014-05-05 | 2014-08-27 | 贾金柱 | Escaped-ammonia on-line measure apparatus for denitration reactor |
| CN104007072B (en) * | 2014-05-05 | 2018-07-06 | 南京波瑞自动化科技有限公司 | For Benitration reactor the escaping of ammonia on-line measurement device |
| CN105067553A (en) * | 2015-08-14 | 2015-11-18 | 安徽蓝盾光电子股份有限公司 | Heat tracing tank based high-precision FTIR (Fourier transform infrared spectroscopy) online measurement system for flue gas |
| CN106526092A (en) * | 2016-12-27 | 2017-03-22 | 吉林省电力科学研究院有限公司 | Automatic calibration system for ammonia escape |
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| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160905 Address after: 210000 No. 68 Sheng Sheng Road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee after: NANJING BORY AUTOMATION TECHNOLOGY Co.,Ltd. Address before: 504, room 3, building 1292, Shuanglong Road, Jiangning District, Jiangsu, Nanjing, 210000 Patentee before: Jia Jinzhu Patentee before: Du Yu |
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Granted publication date: 20150304 |