CN210071641U - In-situ on-line measurement optical assembly, device and system for high-concentration gas in high-temperature high-pressure pipeline - Google Patents
In-situ on-line measurement optical assembly, device and system for high-concentration gas in high-temperature high-pressure pipeline Download PDFInfo
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- CN210071641U CN210071641U CN201920672814.8U CN201920672814U CN210071641U CN 210071641 U CN210071641 U CN 210071641U CN 201920672814 U CN201920672814 U CN 201920672814U CN 210071641 U CN210071641 U CN 210071641U
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- 238000000034 method Methods 0.000 claims abstract description 11
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 88
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Abstract
The utility model discloses an in-situ formula on-line measuring optical assembly, device and system for high concentration gas in high temperature high pressure pipeline, include: a nipple mounted at a measurement point in the pipeline; the short section is communicated with the pipeline, and the temperature of the short section is consistent with that of the pipeline during working; first light through hole and second light through hole have been seted up on the nipple joint, be equipped with first lens in the first light through hole, be equipped with the second lens in the second light through hole to the laser beam that makes laser source transmission is received by the photoelectric detection module behind the gaseous, the second lens that await measuring in first lens, the nipple joint in proper order. The utility model discloses can the direct mount carry out real-time measurement on the measuring point, and can not produce the condensate water in order to influence measuring result in the measurement process, be applicable to atmosphere pollution control technical field.
Description
Technical Field
The utility model relates to a high concentration ammonia on-line measuring's technical field, concretely relates to in situ formula on-line measuring optical assembly, device and system for high concentration gas in high temperature high pressure pipeline.
Background
In recent years, the problem of environmental pollution has been increasingly emphasized. Relevant departments put forward clear requirements on emission reduction of the power industry in ' twelve and five ' plans of energy conservation and emission reduction ', and flue gas denitration becomes the most important part of the power industry.
Denitration of flue gas refers to the removal of harmful NO from flue gas after high-temperature combustion (including combustion in coal-fired boilers, oil-fired and gas-fired boilers, and combustion in some industrial furnaces)xThe final result of the removal being the removal of NO already formedxReduction to N2. At present, domestic power plants commonly adopt a Selective Catalytic Reduction (SCR) technology to carry out denitration, and the principle of the SCR technology is as follows: introducing reducing gas into the flue gas under the action of a catalyst (currently, ammonia gas is generally adopted as the reducing gas for SCR (selective catalytic reduction) reaction in SCR flue gas denitration reaction at home and abroad), and introducing NO into the flue gasxReduction to N2And H2And O. The reaction mechanism is shown as the following formula (taking ammonia as an example):
4NO+4NH 3 +O 2 →4N 2 +6H 2 O
6NO+4NH 3 →5N 2 +6H 2 O
6NO 2 +8NH 3 →7N 2 +12H 2 O
2NO 2 +4NH 3 +O 2 →3N 2 +6H 2 O
at present, an ammonia gas preparation system commonly adopted by a power plant mainly comprises an anhydrous liquid ammonia system, an ammonia water system, a urea system and the like. The anhydrous liquid ammonia system is mainly used for preparing ammonia gas by means of liquid ammonia evaporation, although the system is small in investment and lowest in transportation and use cost, serious potential safety hazards exist, and particularly in the transportation and storage processes, damage caused by liquid ammonia leakage is very large; the investment, operation and transportation costs of the ammonia water system are high, and although the ammonia water system is safer than the ammonia water system, certain potential safety hazards still exist; the investment and operation costs of the urea system are higher than those of the liquid ammonia system, but the transportation costs of the urea system and the liquid ammonia system are equivalent, and the urea system basically has no potential safety hazard, so the urea system is the safest ammonia preparation technology at present.
In the urea system, in order to analyze the degree of urea hydrolysis reaction and the utilization ratio of urea in the whole hydrolysis reaction, the concentration of the urea solution and the flow of the pipeline are timely adjusted according to operation indexes and measurement data by operators in order to achieve closed-loop dynamic management of the concentration of the urea solution, the flow of the pipeline and operation parameters of a unit, so that production can be more efficiently guided, ammonia is accurately and reasonably sprayed, environmental pollution and production waste caused by ammonia overspray after SCR denitration reaction are reduced, and the concentration of ammonia at the outlet of a urea hydrolysis reactor needs to be measured. However, the volume concentration of the ammonia gas at the outlet of the urea catalytic hydrolysis is about 37%, the concentration is too high, and the temperature and the pressure of the gas in the pipeline are high, so that the existing infrared ammonia gas detection, electrochemical ammonia gas detection and other modes are not applicable due to the limitation of the measuring range and the water dew point.
SUMMERY OF THE UTILITY MODEL
To the not enough that exists in the correlation technique, the utility model discloses the technical problem that will solve lies in: the in-situ on-line measurement optical assembly, the device and the system for the high-concentration gas in the high-temperature high-pressure pipeline can be directly installed on a measurement point to perform real-time measurement, and condensation water is not generated in the measurement process to influence the measurement result.
In order to solve the technical problem, the utility model discloses a technical scheme does:
an in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline, comprising: a nipple mounted at a measurement point in the pipeline; the short section is communicated with the pipeline, and the temperature of the short section is consistent with that of the pipeline during working; first light through hole and second light through hole have been seted up on the nipple joint, be equipped with first lens in the first light through hole, be equipped with the second lens in the second light through hole to the laser beam that makes laser source transmission is received by the photoelectric detection module behind the gaseous, the second lens that await measuring in first lens, the nipple joint in proper order.
Preferably, the first lens and the second lens are both wedge-shaped lenses; the wedge-shaped end of the first lens and the wedge-shaped end of the second lens are both positioned in the short section; and a part of non-wedge-shaped end of the first lens and a part of non-wedge-shaped end of the second lens are both positioned outside the short section, and the non-wedge-shaped end of the first lens positioned outside the short section and the non-wedge-shaped end of the second lens are both provided with heat tracing devices.
Preferably, the first light through hole and the second light through hole are symmetrically arranged relative to the radial direction and the axial direction of the short section; the inclined plane of the first lens wedge-shaped end positioned in the short section is parallel to the inclined plane of the second lens wedge-shaped end.
Preferably, the shape and size of the part of the first lens, which is positioned in the first light through hole, are matched with those of the first light through hole, so that the first light through hole is in a sealed state; the shape and the size of the part of the second lens, which is positioned in the second light through hole, are matched with those of the second light through hole, so that the second light through hole is in a sealed state.
Preferably, the heat tracing device is electrically connected with the temperature control module.
Preferably, the heat tracing temperature of the heat tracing means coincides with the temperature of the pipe.
Correspondingly, an in-situ online measuring device for high-concentration gas in a high-temperature high-pressure pipeline comprises: the system comprises a data acquisition and control module, a laser, a collimator, an optical assembly, a photoelectric detector and a main control module; the optical component is the in-situ on-line measurement optical component; the control signal output end of the data acquisition and control module is electrically connected with the input end of the laser control module, the output end of the laser control module is electrically connected with the input end of the laser, the emergent light path of the laser is adapted to the incident light path of the collimator, so that the emergent light beam of the laser enters the first light through hole in the optical assembly after passing through the collimator, the photoelectric detection module is the photoelectric detector, the output end of the photoelectric detector is electrically connected with the acquisition signal input end of the data acquisition and control module, and the communication end of the data acquisition and control module is electrically connected with the communication end of the main control module.
Correspondingly, an in-situ online measurement system for high-concentration gas in a high-temperature high-pressure pipeline, wherein the gas is ammonia gas, and the measurement system comprises: the device comprises a measuring device, an ammonia gas preparation system and an ammonia gas application system, wherein a gas outlet of the ammonia gas preparation system is communicated with a gas inlet of the ammonia gas application system through a pipeline; the measuring device is the in-situ online measuring device, and the measuring device is positioned on a pipeline between the ammonia gas preparation system and the ammonia gas application system.
Preferably, the duct comprises: a first gas delivery conduit and a second gas delivery conduit; one end of a short section in the measuring device is communicated with an air outlet of the ammonia gas preparation system through the first gas conveying pipeline, and the other end of the short section is communicated with an air inlet of the ammonia gas application system through the second gas conveying pipeline.
Preferably, the short section is a flange short section; the ammonia gas preparation system is a urea hydrolysis system; the ammonia gas application system is an SCR system.
The utility model has the advantages of:
1. the in-situ online measuring system in the utility model mainly comprises a measuring device, an ammonia gas preparation system and an ammonia gas application system, wherein the measuring device mainly comprises a data acquisition and control module, a laser, a collimator, an optical assembly, a photoelectric detector and a main control module, the optical assembly mainly comprises a short section, two light through holes are formed in the short section, and lenses are arranged in the two light through holes; the pipe nipple is used as a part of a gas conveying pipeline and is arranged on a proper measuring point on a pipeline between an ammonia gas preparation system and an ammonia gas application system, so that ammonia gas output from the ammonia gas preparation system can directly enter the ammonia gas application system through the pipe nipple; when the gas concentration measuring device works, the laser is controlled to emit laser beams with a certain frequency through the data acquisition and control module and the laser control module, the laser beams sequentially pass through the incident lens in the light through hole, gas to be measured (such as ammonia gas) in the short section and the emergent lens in the light through hole after passing through the collimator and then are received by the photoelectric detector, the photoelectric detector converts optical signals into electric signals and outputs the electric signals to the data acquisition and control module, the data acquisition and control module calculates the concentration of the gas to be measured in the mixed gas according to the received harmonic signals and carries out calculation processing and storage on the data, and meanwhile, the data are transmitted to the main control module, so that the main control module carries out subsequent analysis and processing on the data.
The utility model discloses when implementing, can directly install the nipple joint and carry out real-time measurement on gas transmission pipeline's arbitrary measuring point, the nipple joint is integrated as an organic whole with the pipeline as partly of pipeline, and the temperature at during operation nipple joint can keep unanimous with the temperature of pipeline, can prevent the production of condensate water by great degree like this, guarantees effectively going on of this normal position measurement mode and measuring result's accuracy nature.
2. The incident lens and the emergent lens adopted by the optical assembly in the utility model are both wedge-shaped lenses, and the wedge-shaped ends of the two wedge-shaped lenses are both positioned inside the short section, so that the gas flowing through the short section can be fully detected, the dead angle in the measurement is avoided, and the accuracy of the measurement result is ensured; in addition, the non-wedge ends of the two wedge-shaped lenses extend out of the short section, the exposed parts of the two wedge-shaped lenses are respectively provided with a heat tracing device, the heat tracing devices can keep the exposed parts of the two wedge-shaped lenses within a certain temperature range, and then the overall temperature of the two wedge-shaped lenses and the temperature of the short section and the temperature of the pipeline can be controlled on a horizontal line, so that the generation of condensed water is further prevented, the light path is guaranteed not to be interfered by external condensed water, and the effectiveness of the in-situ measurement mode and the accuracy of the measurement result are guaranteed to a greater extent.
3. The utility model discloses a two clear apertures and two wedge lenses among the optical assembly are when mutually supporting the use, and two clear apertures are the enclosed state, make whole measurement cavity be encapsulated situation like this, have prevented that the light path from interfering, have further improved measuring result's accuracy nature.
4. The utility model provides a heat tracing device can with temperature control module electrical connection, through temperature control module, can adjust and control heat tracing device's heat tracing temperature according to the practical application demand, has better flexibility and adaptability.
5. The utility model discloses flange nipple joint can be chooseed for use to the nipple joint among the well optical assembly, the installation of being convenient for, convenient to use.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic structural diagram of an in-situ online measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an in-situ online measurement device for high-concentration gas in a high-temperature high-pressure pipeline according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an in-situ online measurement system for high-concentration gas in a high-temperature high-pressure pipeline according to an embodiment of the present invention;
in the figure: 10 is measuring device, 20 is ammonia preparation system, 30 is ammonia application system, 40 is first gas transmission pipeline, 50 is the second gas transmission pipeline, 101 is data acquisition and control module, 102 is laser control module, 103 is the laser instrument, 104 is the collimator, 105 is optical assembly, 106 is photoelectric detector, 107 is master control module, 1051 is the nipple joint, 1052 is first lens, 1053 is the second lens, 1054 is the heat tracing device, 1055 is temperature control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
The utility model provides an original position formula on-line measuring optical assembly for high concentration gas in high temperature high pressure pipeline, figure 1 is the utility model discloses an embodiment provides a structural schematic diagram for original position formula on-line measuring optical assembly for high concentration gas in high temperature high pressure pipeline, as shown in figure 1, an original position formula on-line measuring optical assembly for high concentration gas in high temperature high pressure pipeline can include: a nipple 1051 mounted at a measurement point in the pipe; the short section 1051 is communicated with the pipeline, and the temperature of the short section 1051 is consistent with that of the pipeline during operation; the pup joint 1051 is provided with a first light through hole and a second light through hole, a first lens 1052 is arranged in the first light through hole, and a second lens 1053 is arranged in the second light through hole, so that a laser beam emitted by the laser source sequentially passes through the first lens 1052, gas to be detected in the pup joint 1051, and the second lens 1053 and then is received by the photoelectric detection module.
The utility model also provides an original position formula on-line measuring device for high concentration gas in high temperature high pressure pipeline, figure 2 is the utility model discloses an embodiment provides a structural schematic diagram for an original position formula on-line measuring device for high concentration gas in high temperature high pressure pipeline, as shown in figure 2, an original position formula on-line measuring device for high concentration gas in high temperature high pressure pipeline can include: the system comprises a data acquisition and control module 101, a laser control module 102, a laser 103, a collimator 104, an optical assembly 105, a photoelectric detector 106 and a main control module 107; the optical assembly 105 is the in-situ on-line measurement optical assembly; the control signal output end of the data acquisition and control module 101 is electrically connected to the input end of the laser control module 102, the output end of the laser control module 102 is electrically connected to the input end of the laser 103, the emergent light path of the laser 103 is adapted to the incident light path of the collimator 104, so that the emergent light beam of the laser 103 passes through the collimator 104 and enters the first light-passing hole in the optical assembly 105, the photoelectric detection module is the photoelectric detector 106, the output end of the photoelectric detector 106 is electrically connected to the acquisition signal input end of the data acquisition and control module 101, and the communication end of the data acquisition and control module 101 is electrically connected to the communication end of the main control module 107.
The utility model also provides an original position formula on-line measuring system for high concentration gas in high temperature high pressure pipeline, gas can be the ammonia, and fig. 3 is the utility model discloses an embodiment provides a structural schematic diagram for an original position formula on-line measuring system for high concentration gas in high temperature high pressure pipeline, as shown in fig. 3, measuring system can include: the device comprises a measuring device 10, an ammonia gas preparation system 20 and an ammonia gas application system 30, wherein a gas outlet of the ammonia gas preparation system 20 is communicated with a gas inlet of the ammonia gas application system 30 through a pipeline; the measuring device 10 is the in-situ online measuring device, and the measuring device 10 is located on a pipeline between the ammonia gas preparation system 20 and the ammonia gas application system 30.
The in-situ online measuring system in the embodiment mainly comprises a measuring device, an ammonia gas preparation system and an ammonia gas application system, wherein the measuring device mainly comprises a data acquisition and control module, a laser, a collimator, an optical assembly, a photoelectric detector and a main control module, the optical assembly mainly comprises a short section, two light through holes are formed in the short section, and lenses are arranged in the two light through holes; the pipe nipple is used as a part of a gas conveying pipeline and is arranged on a proper measuring point on a pipeline between an ammonia gas preparation system and an ammonia gas application system, so that ammonia gas output from the ammonia gas preparation system can directly enter the ammonia gas application system through the pipe nipple; when the gas concentration measuring device works, the laser is controlled to emit laser beams with a certain frequency through the data acquisition and control module and the laser control module, the laser beams sequentially pass through the incident lens in the light through hole, gas to be measured (such as ammonia gas) in the short section and the emergent lens in the light through hole after passing through the collimator and then are received by the photoelectric detector, the photoelectric detector converts optical signals into electric signals and outputs the electric signals to the data acquisition and control module, the data acquisition and control module calculates the concentration of the gas to be measured in the mixed gas according to the received harmonic signals and carries out calculation processing and storage on the data, and meanwhile, the data are transmitted to the main control module, so that the main control module carries out subsequent analysis and processing on the data.
The utility model discloses when implementing, can directly install the nipple joint and carry out real-time measurement on gas transmission pipeline's arbitrary measuring point, the nipple joint is integrated as an organic whole with the pipeline as partly of pipeline, and the temperature at during operation nipple joint can keep unanimous with the temperature of pipeline, can prevent the production of condensate water by great degree like this, guarantees effectively going on of this normal position measurement mode and measuring result's accuracy nature.
Specifically, the laser 103 may be a tunable semiconductor laser, and when the gas to be measured is ammonia gas, the output frequency of the laser 103 may be stabilized at the ammonia gas spectral line center frequency ѵ by adjusting the temperature and the current of the laser control module 1020=6528.69 cm-1To (3).
Specifically, the main control module 107 may be a DCS system.
Further, in the in-situ online measurement system for high-concentration gas in a high-temperature high-pressure pipeline, the pipeline may include: a first gas delivery conduit 40 and a second gas delivery conduit 50; one end of a short section 1051 in the measuring device 10 is communicated with the gas outlet of the ammonia gas preparation system 20 through the first gas conveying pipeline 40, and the other end of the short section 1051 is communicated with the gas inlet of the ammonia gas application system 30 through the second gas conveying pipeline 50.
Furthermore, the short section 1051 can be a flange short section, so that the installation and the use are convenient; the ammonia gas preparation system 20 may be a urea hydrolysis system; the ammonia gas application system 30 may be an SCR system.
Further, in the in-situ online measurement optical assembly for high concentration gas in high temperature and high pressure pipeline, the first lens 1052 and the second lens 1053 may be wedge-shaped lenses; the wedge-shaped end of the first lens 1052 and the wedge-shaped end of the second lens 1053 are both positioned inside the short section 1051; a part of the non-wedge-shaped end of the first lens 1052 and a part of the non-wedge-shaped end of the second lens 1053 are both located outside the short section 1051, and the heat tracing device 1054 is arranged on the non-wedge-shaped end of the first lens 1052 and the non-wedge-shaped end of the second lens 1053 which are located outside the short section 1051.
The incident lens and the emergent lens adopted by the optical assembly in the embodiment are both wedge-shaped lenses, and the wedge-shaped ends of the two wedge-shaped lenses are both positioned in the short section, so that gas flowing through the short section can be fully detected, dead angles in measurement are avoided, and the accuracy of the measurement result is ensured; in addition, the non-wedge ends of the two wedge-shaped lenses extend out of the short section, the exposed parts of the two wedge-shaped lenses are respectively provided with a heat tracing device, the heat tracing devices can keep the exposed parts of the two wedge-shaped lenses within a certain temperature range, and then the overall temperature of the two wedge-shaped lenses and the temperature of the short section and the temperature of the pipeline can be controlled on a horizontal line, so that the generation of condensed water is further prevented, the light path is guaranteed not to be interfered by external condensed water, and the effectiveness of the in-situ measurement mode and the accuracy of the measurement result are guaranteed to a greater extent.
Furthermore, the first light through hole and the second light through hole can be symmetrically arranged relative to the radial direction and the axial direction of the short section 1051; the bevel of the wedge-shaped end of the first lens 1052 inside the short 1051 is parallel to the bevel of the wedge-shaped end of the second lens 1053.
Further, the shape and size of the portion of the first lens 1052 located in the first light passing hole are adapted to the shape and size of the first light passing hole, so that the first light passing hole is in a sealed state; the shape and size of the portion of the second lens 1053 inside the second light through hole are matched with those of the second light through hole, so that the second light through hole is in a sealed state.
When two light through holes and two wedge-shaped lenses in the optical assembly are mutually matched for use in the embodiment, the two light through holes are in a closed state, so that the whole measuring cavity is in a sealed state, light path interference is prevented, and the accuracy of a measuring result is further improved.
Further, the heat tracing 1054 may be electrically connected to the temperature control module 1055.
The heat tracing device in the embodiment can be electrically connected with the temperature control module, and the heat tracing temperature of the heat tracing device can be adjusted and controlled according to the actual application requirement through the temperature control module, so that the heat tracing device has better flexibility and adaptability.
Further, the heat tracing temperature of the heat tracing 1054 corresponds to the temperature of the pipe.
Specifically, an electric heat tracing system or a steam heat tracing system can be arranged on the whole short section and the gas conveying pipeline according to actual requirements, and the heat tracing temperature can not be lower than 150 ℃ in order to ensure that condensation water is not generated because the pressure in the pipeline is about 0.6Mpa under the normal condition.
Specifically, the heat trace 1054 may be an electric heat trace. In practical application, the temperature of the heat tracing device 1054 can not be lower than 150 ℃ in order to ensure that the light path is not interfered by external condensed water.
The utility model is used for the ammonia concentration that generates after urea catalytic hydrolysis reaction in the ammonia that utilizes urea catalytic hydrolysis to generate makes the technological process of the fire coal flue gas denitration of thermal power plant's, can realize directly carrying out on-line measurement to ammonia concentration under the condition that does not change on-the-spot high temperature high pressure ammonia mist working condition, through the configuration optimization and the optimization arrangement to measuring window, and carried out the companion's heat to the window, thereby the change of having solved among the current measuring means because measuring the gas operating mode of introduction (temperature T, pressure P, flow Q) causes measuring error problem and extraction dilution indirect measurement to introduce measurement hysteresis and precision reduction problem, have outstanding substantive characteristics and the progress that is showing.
In the description of the present invention, it is to be understood that the terms "symmetrical", "radial", "axial", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "provided," "disposed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the assemblies, devices and systems described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In addition, in the embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other ways.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides an in-situ formula on-line measuring optical assembly for high concentration gas in high temperature high pressure pipeline which characterized in that: the method comprises the following steps: a nipple (1051) mounted on a measurement point in the pipe;
the short section (1051) is communicated with the pipeline, and the temperature of the short section (1051) is consistent with that of the pipeline during operation;
the short section (1051) is provided with a first light through hole and a second light through hole, a first lens (1052) is arranged in the first light through hole, and a second lens (1053) is arranged in the second light through hole, so that a laser beam emitted by the laser source sequentially passes through the first lens (1052), gas to be detected in the short section (1051) and the second lens (1053) and then is received by the photoelectric detection module.
2. The in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to claim 1, wherein:
the first lens (1052) and the second lens (1053) are both wedge lenses;
the wedge-shaped end of the first lens (1052) and the wedge-shaped end of the second lens (1053) are both positioned inside the short joint (1051);
a part of the non-wedge-shaped end of the first lens (1052) and a part of the non-wedge-shaped end of the second lens (1053) are both positioned outside the short section (1051), and heat tracing devices (1054) are arranged on the non-wedge-shaped end of the first lens (1052) and the non-wedge-shaped end of the second lens (1053) which are positioned outside the short section (1051).
3. The in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to claim 2, wherein:
the first light through hole and the second light through hole are symmetrically arranged relative to the radial direction and the axial direction of the short section (1051);
the bevel of the wedge-shaped end of the first lens (1052) positioned in the short section (1051) is parallel to the bevel of the wedge-shaped end of the second lens (1053).
4. The in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to claim 2, wherein:
the shape and the size of the part of the first lens (1052) positioned in the first light through hole are matched with the shape and the size of the first light through hole, so that the first light through hole is in a sealed state;
the shape and the size of the part of the second lens (1053) positioned in the second light through hole are matched with those of the second light through hole, so that the second light through hole is in a sealed state.
5. The in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to claim 2, wherein: the heat tracing device (1054) is electrically connected with the temperature control module (1055).
6. The in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline according to claim 2, wherein: the heat tracing temperature of the heat tracing device (1054) is consistent with the temperature of the pipeline.
7. An in-situ online measuring device for high-concentration gas in a high-temperature high-pressure pipeline comprises: the system comprises a data acquisition and control module (101), a laser control module (102), a laser (103), a collimator (104), an optical component (105), a photoelectric detector (106) and a main control module (107); the method is characterized in that:
the optical component (105) is an in-situ on-line measurement optical component as claimed in any one of claims 1 to 6;
the control signal output end of the data acquisition and control module (101) is electrically connected with the input end of the laser control module (102), the output end of the laser control module (102) is electrically connected with the input end of the laser (103), the emergent light path of the laser (103) is adapted to the incident light path of the collimator (104), so that the emergent light beam of the laser (103) enters the first light through hole in the optical component (105) after passing through the collimator (104), the photoelectric detection module is the photoelectric detector (106), the output end of the photoelectric detector (106) is electrically connected with the acquisition signal input end of the data acquisition and control module (101), and the communication end of the data acquisition and control module (101) is electrically connected with the communication end of the main control module (107).
8. An in-situ on-line measurement system for high-concentration gas in a high-temperature high-pressure pipeline, wherein the gas is ammonia gas, and the measurement system comprises: the device comprises a measuring device (10), an ammonia gas preparation system (20) and an ammonia gas application system (30), wherein a gas outlet of the ammonia gas preparation system (20) is communicated with a gas inlet of the ammonia gas application system (30) through a pipeline; the method is characterized in that:
the measuring device (10) is an in-situ on-line measuring device as defined in claim 7, and the measuring device (10) is located on a pipeline between the ammonia gas production system (20) and the ammonia gas application system (30).
9. The in-situ online measurement system for high-concentration gas in a high-temperature high-pressure pipeline according to claim 8, wherein: the pipe includes: a first gas delivery conduit (40) and a second gas delivery conduit (50);
one end of a short section (1051) in the measuring device (10) is communicated with an air outlet of the ammonia gas preparation system (20) through the first gas conveying pipeline (40), and the other end of the short section (1051) is communicated with an air inlet of the ammonia gas application system (30) through the second gas conveying pipeline (50).
10. The in-situ online measurement system for high-concentration gas in a high-temperature high-pressure pipeline according to claim 9, wherein:
the short section (1051) is a flange short section;
the ammonia gas preparation system (20) is a urea hydrolysis system;
the ammonia gas application system (30) is an SCR system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243761A (en) * | 2019-05-13 | 2019-09-17 | 清华大学 | For the in-situ type on-line measurement optical module of high-temperature and pressure pipeline middle and high concentration gas, device and system |
| CN111751322A (en) * | 2020-07-21 | 2020-10-09 | 清华大学 | In-situ CO gas measuring device and method based on wavelength modulation spectrum technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243761A (en) * | 2019-05-13 | 2019-09-17 | 清华大学 | For the in-situ type on-line measurement optical module of high-temperature and pressure pipeline middle and high concentration gas, device and system |
| CN110243761B (en) * | 2019-05-13 | 2024-01-30 | 清华大学 | In-situ on-line measurement optical component, device and system for high-concentration gas |
| CN111751322A (en) * | 2020-07-21 | 2020-10-09 | 清华大学 | In-situ CO gas measuring device and method based on wavelength modulation spectrum technology |
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