CN203310747U - Ammonia escape monitoring device - Google Patents
Ammonia escape monitoring device Download PDFInfo
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- CN203310747U CN203310747U CN2013202770971U CN201320277097U CN203310747U CN 203310747 U CN203310747 U CN 203310747U CN 2013202770971 U CN2013202770971 U CN 2013202770971U CN 201320277097 U CN201320277097 U CN 201320277097U CN 203310747 U CN203310747 U CN 203310747U
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Abstract
The utility model discloses an ammonia escape monitoring device. The ammonia escape monitoring device comprises a transmitting terminal probe, a first extending pipe connected with the transmitting terminal probe, a first filtering core connected with the first extending pipe, a receiving terminal probe, a second extending pipe connected with the receiving terminal probe, and a second filtering core connected with the second extending pipe, wherein the distance between the free end of the first filtering core and the free end of the second filtering core is L; the length sum of the length L1 of the first filtering core and the length L2 of the second filtering core is greater than or equal to an effective measured optical distance. According to the ammonia escape monitoring device disclosed by the utility model, the filtering cores are used for filtering dust; the distance between the free end of the first filtering core and the free end of the second filtering core is L; the length sum of the length L1 of the first filtering core and the length L2 of the second filtering core is greater than or equal to the effective measured optical distance, so that by using the device, the ammonia escape monitoring can be carried out normally under the condition that the concentration of the dust is very high, and the accuracy of monitoring data is guaranteed.
Description
Technical field
The utility model relates to monitoring technology, relates in particular to a kind of the escaping of ammonia monitoring device.
Background technology
In cement production process, the cement rotary kiln tail is the emission point of some pollutants, and discharge capacity is larger.These pollutant component complexity, mainly contain the harmful gases such as sulphuric dioxide, oxides of nitrogen, fluoride, in addition, also has the dust of high concentration.These pollutant serious harm health and ecologic environments, need to take measure targetedly to reduce the concentration of these pollutants, reaches the emission request of regulation, realizes monitoring objective.
Wherein, aspect denitrification, existing method adopts selective catalytic reduction (Selective Catalytic Reduction, SCR) usually.The SCR technology adopts vertical catalyst reaction tower and anhydrous ammonia, from the flue gas of coal fired combustion and coal-burning power plant, removing oxides of nitrogen.The general ammonia (NH3) that adopts, as reactant, mixes the rear catalyst layer that passes through with the flue gas that boiler is discharged, and at catalyst layer, reduction of nitrogen oxide is resolved into to harmless nitrogen G&W under the effect of catalyzer.The denitration rate of SCR technology can reach more than 90%, and the escaping of ammonia is lower than 5ppm(5/1000000ths), capacity utilization is high, and essentially no secondary pollution is current more advanced gas denitrifying technology.
In the denitration technology of SCR, the escaping of ammonia monitoring is a very important link.In prior art, modal is to adopt tunable diode laser absorption spectroscopy (Tunable Diode Laser Absorption Spectroscopy, TDLAS) instrument carries out the monitoring of the escaping of ammonia, is mainly to utilize the narrow linewidth of semiconductor laser with tunable and wavelength with the characteristic realization that Injection Current changes, the very closely very indistinguishable Absorption Line of single or several distances of molecule to be measured.Fig. 1 is the schematic diagram of the escaping of ammonia monitoring device that is applied to a tunable diode laser absorption spectroscopy instrument of flue in prior art, transmitting terminal probe and receiving end probe are installed respectively on the flue both sides, the laser receiving end probe of transmitting terminal probe emission is responded to and analyzes, and measures the concentration of ammonia in flue.Distance between transmitting terminal probe and receiving end probe need to be more than or equal to effective measurement light path, wherein effectively measures light path and refers to the flue gas width through detection light source.
In the situation that without dust or low concentration dust, tunable diode laser absorption spectroscopy instrument shown in Figure 1 can meet the measurement requirement.Yet in actual applications, fewer without the situation of dust or low concentration dust, more situation is that tested gas contains dust, and concentration is higher.These dust have stopped measures penetrating of laser.For addressing this problem, current solution is as shown in Figure 2, at transmitting terminal probe and receiving end probe, extension tube to be installed respectively.Extension tube can stop dust, from a distance, can hold flue gas and pass through between two extension tubes.Distance between the prolongation pipe end of transmitting terminal and the prolongation pipe end of receiving end is more than or equal to effective measurement light path, and in the situation that the higher dust of concentration, the escaping of ammonia monitoring effect is better.
The inventor finds through long-term research and experiment, prior art scheme shown in Figure 2, although in the situation that dust concentration is higher, can reach reasonable monitoring effect, but under some scenes, the flue of cement rotary kiln tail for example, dust concentration in it is very high, may reach 150g/m3, in this case, if the distance between the prolongation pipe end of the prolongation pipe end of transmitting terminal and receiving end is wider, because dust concentration is very high, flue gas has a strong impact on measures penetrating of laser, can not meet the measurement requirement, can't carry out the monitoring of the escaping of ammonia.
The utility model content
Technical problem to be solved in the utility model is, a kind of the escaping of ammonia monitoring device is provided, and to solve prior art in the situation that dust concentration is very high, can not normally carry out the problem of the escaping of ammonia monitoring.
For solving the problems of the technologies described above, a kind of the escaping of ammonia monitoring device that the utility model provides comprises: the transmitting terminal probe, with the first extension tube that described transmitting terminal probe is connected, the first filter core be connected with described the first extension tube; The receiving end probe, with the second extension tube that described receiving end probe is connected, the second filter core be connected with described the second extension tube;
Wherein, distance L between the free end of the free end of described the first filter core and described the second filter core, the length L 1 of described the first filter core, with the length summation of the length L 2 of described the second filter core, be more than or equal to effective measurement light path, that is: L1+L+L2 >=1.8 (L1 >=0.7, L2 >=0.7, L >=0.4)
Described the first filter core and the second filter core are that filtering accuracy is the stainless steel filter core of 2 microns.
The connected mode of described the first filter core and the first extension tube, and the connected mode of the second filter core and the second extension tube, employing is welded to connect.
The escaping of ammonia monitoring device that the utility model provides, adopt the filter element filtering dust, and make the distance L between the free end of the free end of the first filter core and the second filter core, the length L 1 of the first filter core, with the length summation of the length L 2 of the second filter core, be more than or equal to effective measurement light path, in the situation that dust concentration is very high, also can normally carries out the monitoring of the escaping of ammonia, and guarantee the accuracy of Monitoring Data.
The accompanying drawing explanation
The schematic diagram of the escaping of ammonia monitoring device of Fig. 1 prior art;
In Fig. 2 prior art with the schematic diagram of the escaping of ammonia monitoring device of extension tube;
The schematic diagram of Fig. 3 the escaping of ammonia monitoring device of the present invention embodiment.
Embodiment
For making technical problem to be solved in the utility model, technical scheme and technique effect clearer, below in conjunction with accompanying drawing, embodiments of the present invention are described in detail.
The inventor finds through research, dwindle the distance between the prolongation pipe end of the prolongation pipe end of transmitting terminal and receiving end, laser can be guaranteed to measure and measured medium can be penetrated, but like this, distance between the prolongation pipe end of transmitting terminal and the prolongation pipe end of receiving end, just can not meet the condition that is more than or equal to effective measurement light path, the data that the tunable diode laser absorption spectroscopy apparatus measures obtains are just inaccurate.The inventor, through repetition test research, has improved existing the escaping of ammonia monitoring device.
As shown in Figure 3, a kind of the escaping of ammonia monitoring device that the utility model provides comprises: the transmitting terminal probe, with the first extension tube that the transmitting terminal probe is connected, the first filter core be connected with the first extension tube; The receiving end probe, with the second extension tube that the receiving end probe is connected, the second filter core be connected with the second extension tube; Wherein, the distance L between the free end a of the first filter core and the free end b of the second filter core, the length L 1 of the first filter core, and the length summation of the length L 2 of the second filter core is more than or equal to effective measurement light path.
Described effective measurement light path is relevant with dust concentration.Preferably, the distance L between the free end of the free end of the first filter core and the second filter core, the length L 1 of the first filter core, and the length summation of the length L 2 of the second filter core can be more than or equal to 1.8 meters.
Distance L between the free end of the free end of the first filter core and the second filter core can be for being more than or equal to 0.4 meter, and the length L 1 of the first filter core can be for being more than or equal to 0.7 meter, and the length L 2 of the second filter core can be for being more than or equal to 0.7 meter.
The first above-mentioned filter core and the second filter core can adopt filtering accuracy to be more than or equal to the stainless steel filter core of 2 microns.The connected mode of the first filter core and the first extension tube, and the connected mode of the second filter core and the second extension tube, can adopt and be welded to connect.
The escaping of ammonia monitoring device that the utility model provides, adopt the filter element filtering dust, and make the distance L between the free end of the free end of the first filter core and the second filter core, the length L 1 of the first filter core, with the length summation of the length L 2 of the second filter core, be more than or equal to effective measurement light path, in the situation that dust concentration is very high, also can normally carries out the monitoring of the escaping of ammonia, and guarantee the accuracy of Monitoring Data.
The escaping of ammonia monitoring device that the utility model provides, expanded the application of the escaping of ammonia monitoring device, and making becomes possibility such as under the very high environment of the dust such as cement industry, carrying out the escaping of ammonia monitoring accurately.
Claims (7)
1. a escaping of ammonia monitoring device, is characterized in that, comprising: the transmitting terminal probe, with the first extension tube that described transmitting terminal probe is connected, the first filter core be connected with described the first extension tube; The receiving end probe, with the second extension tube that described receiving end probe is connected, the second filter core be connected with described the second extension tube;
Wherein, the distance L between the free end of the free end of described the first filter core and described the second filter core, the length L 1 of described the first filter core, and the length summation of the length L 2 of described the second filter core is more than or equal to effective measurement light path.
2. the escaping of ammonia monitoring device according to claim 1, is characterized in that, the distance L between the free end of the free end of described the first filter core and the second filter core, and the length L 1 of the first filter core, and the length summation of the length L 2 of the second filter core is more than or equal to 1.8 meters.
3. the escaping of ammonia monitoring device according to claim 1, is characterized in that, the distance L between the free end of the free end of described the first filter core and the second filter core is more than or equal to 0.4 meter.
4. the escaping of ammonia monitoring device according to claim 1, is characterized in that, the length L 1 of described the first filter core is more than or equal to 0.7 meter.
5. the escaping of ammonia monitoring device according to claim 1, is characterized in that, the length L 2 of described the second filter core is more than or equal to 0.7 meter.
6. the escaping of ammonia monitoring device according to claim 1, is characterized in that, described the first filter core and the second filter core are that filtering accuracy is more than or equal to the stainless steel filter core of 2 microns.
7. the escaping of ammonia monitoring device according to claim 1, is characterized in that, the connected mode of described the first filter core and the first extension tube, and the connected mode of the second filter core and the second extension tube, and employing is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202770971U CN203310747U (en) | 2013-05-21 | 2013-05-21 | Ammonia escape monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202770971U CN203310747U (en) | 2013-05-21 | 2013-05-21 | Ammonia escape monitoring device |
Publications (1)
| Publication Number | Publication Date |
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| CN203310747U true CN203310747U (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202770971U Expired - Fee Related CN203310747U (en) | 2013-05-21 | 2013-05-21 | Ammonia escape monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940778A (en) * | 2014-05-19 | 2014-07-23 | 国家电网公司 | System for measuring escaping ammonia in flue gas |
| CN104236988A (en) * | 2014-10-11 | 2014-12-24 | 江苏交科工程检测技术有限公司 | Ammonia escape analyzer pretreatment device, using method and purposes |
-
2013
- 2013-05-21 CN CN2013202770971U patent/CN203310747U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940778A (en) * | 2014-05-19 | 2014-07-23 | 国家电网公司 | System for measuring escaping ammonia in flue gas |
| CN104236988A (en) * | 2014-10-11 | 2014-12-24 | 江苏交科工程检测技术有限公司 | Ammonia escape analyzer pretreatment device, using method and purposes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20210521 |