CN110243761B - In-situ on-line measurement optical component, device and system for high-concentration gas - Google Patents
In-situ on-line measurement optical component, device and system for high-concentration gas Download PDFInfo
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- CN110243761B CN110243761B CN201910415517.XA CN201910415517A CN110243761B CN 110243761 B CN110243761 B CN 110243761B CN 201910415517 A CN201910415517 A CN 201910415517A CN 110243761 B CN110243761 B CN 110243761B
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- 238000005259 measurement Methods 0.000 title claims abstract description 65
- 230000003287 optical effect Effects 0.000 title claims abstract description 41
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 36
- 210000002445 nipple Anatomy 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 114
- 229910021529 ammonia Inorganic materials 0.000 claims description 39
- 238000002360 preparation method Methods 0.000 claims description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 16
- 239000004202 carbamide Substances 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000009833 condensation Methods 0.000 abstract description 10
- 230000005494 condensation Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000003915 air pollution Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 50
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012625 in-situ measurement Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0332—Cuvette constructions with temperature control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0118—Apparatus with remote processing
- G01N2021/0143—Apparatus with remote processing with internal and external computer
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an in-situ on-line measurement optical component, a device and a system for high-concentration gas in a high-temperature high-pressure pipeline, which comprise the following components: the nipple is arranged on a measuring point in the pipeline; the short section is communicated with the pipeline, and the temperature of the short section is consistent with the temperature of the pipeline during operation; the short section is provided with a first light passing hole and a second light passing hole, a first lens is arranged in the first light passing hole, and a second lens is arranged in the second light passing hole, so that a laser beam emitted by the laser source sequentially passes through the first lens, the gas to be detected in the short section and the second lens and then is received by the photoelectric detection module. The invention can be directly arranged on a measuring point for real-time measurement, and can not generate condensation water in the measuring process to influence the measuring result, thereby being applicable to the technical field of air pollution control.
Description
Technical Field
The invention relates to the technical field of high-concentration ammonia gas online measurement, in particular to an in-situ online measurement optical assembly, device and system for high-concentration gas in a high-temperature high-pressure pipeline.
Background
In recent years, environmental pollution has become more important. The related departments have set clear requirements for the emission reduction of the power industry in related documents, and flue gas denitration becomes a serious issue.
Denitration of flue gas refers to the process of burning harmful substances NO contained in flue gas after high temperature combustion (including combustion of coal-fired boiler, combustion of oil-fired and gas-fired boiler and combustion of some industrial furnaces) x Removal techniques, the end result being the production of NO x Reduction to N 2 . At present, a Selective Catalytic Reduction (SCR) technology is commonly adopted for denitration in domestic power plants, and the principle of the SCR technology is as follows: under the action of a catalyst, reducing gas is introduced into the flue gas (ammonia is generally adopted in the SCR flue gas denitration reaction at home and abroad at present)As a reducing gas for SCR reaction), NO x Reduction to N 2 And H 2 O. The reaction mechanism is shown in the following formula (taking ammonia as an example):
the ammonia preparation system commonly adopted in the current power plant mainly comprises an anhydrous liquid ammonia system, an ammonia water system, a urea system and the like. The anhydrous liquid ammonia system mainly uses a liquid ammonia evaporation means to prepare ammonia, and the system has great potential safety hazards although small investment and lowest transportation and use cost, particularly in the transportation and storage processes, the damage caused by liquid ammonia leakage is very large; the investment, operation and transportation costs of the ammonia water system are very high, and certain potential safety hazards still exist although the ammonia water system is safer than liquid ammonia; the investment and running cost of the urea system are higher than those of the liquid ammonia system, but the two transportation costs are equivalent, and the urea system has no potential safety hazard basically, so the urea system is the safest ammonia preparation technology at present.
In order to analyze the degree of the urea hydrolysis reaction and the utilization rate of urea in the whole hydrolysis reaction in the urea system, and simultaneously, in order to facilitate operators to timely adjust the concentration of the urea solution and the flow of a pipeline according to the operation indexes and the measurement data, so as to achieve closed-loop dynamic management of the concentration of the urea solution, the flow of the pipeline and the operation parameters of a unit, thereby being capable of guiding production more efficiently, accurately and reasonably spraying ammonia, reducing environmental pollution and production waste caused by excessive spraying of ammonia after SCR denitration reaction, and measuring the concentration of the ammonia at the outlet of the urea hydrolysis reactor. However, as the volume concentration of the ammonia gas at the urea catalytic hydrolysis outlet is about 37%, the concentration is too high, and meanwhile, the gas temperature and pressure in the pipeline are higher, and the existing infrared ammonia gas detection and electrochemical ammonia gas detection modes are not applicable any more due to the limitation of the range measurement range and the water dew point.
Disclosure of Invention
Aiming at the defects existing in the related technology, the invention aims to solve the technical problems that: provided are an in-situ on-line measurement optical assembly, device and system for high concentration gas in a high temperature and high pressure pipeline, which can be directly installed on a measurement point to perform real-time measurement, and which does not generate condensation water during the measurement process to influence the measurement result.
In order to solve the technical problems, the invention adopts the following technical scheme:
an in-situ on-line measurement optical assembly for high concentration gas in a high temperature, high pressure pipeline, comprising: the nipple is arranged on a measuring point in the pipeline; the short section is communicated with the pipeline, and the temperature of the short section is consistent with the temperature of the pipeline during operation; the short section is provided with a first light passing hole and a second light passing hole, a first lens is arranged in the first light passing hole, and a second lens is arranged in the second light passing hole, so that a laser beam emitted by the laser source sequentially passes through the first lens, the gas to be detected in the short section and the second lens and then is received by the photoelectric detection module.
Preferably, the first lens and the second lens are wedge lenses; the wedge-shaped end of the first lens and the wedge-shaped end of the second lens are both positioned in the pup joint; and a part of the non-wedge-shaped end of the first lens and a part of the non-wedge-shaped end of the second lens are both positioned outside the short section, and the first lens non-wedge-shaped end and the second lens non-wedge-shaped end positioned outside the short section 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 wedge-shaped end of the first lens positioned in the pup joint is parallel to the inclined plane of the wedge-shaped end of the second lens.
Preferably, the shape and the size of the part of the first lens in the first light-passing hole are matched with the shape and the size of the first light-passing hole, so that the first light-passing hole is in a sealing state; the shape and the size of the part of the second lens in the second light through hole are matched with the shape and the size of the second light through hole, so that the second light through hole is in a sealing state.
Preferably, the heat tracing device is electrically connected with the temperature control module.
Preferably, the heat tracing temperature of the heat tracing device is consistent with the temperature of the pipeline.
Correspondingly, the in-situ on-line measuring device for the high-concentration gas in the 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 online 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, an emergent light path of the laser is adapted to an incident light path of the collimator, so that an emergent light beam of the laser passes through the collimator and then enters a first light passing hole in the optical assembly, the photoelectric detection module is a 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 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, an ammonia preparation system and an ammonia application system, wherein an air outlet of the ammonia preparation system is communicated with an air inlet of the ammonia 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 pipe comprises: a first gas delivery conduit and a second gas delivery conduit; one end of the short section in the measuring device is communicated with the 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 the air inlet of the ammonia gas application system through the second gas conveying pipeline.
Preferably, the nipple is a flange nipple; the ammonia gas preparation system is a urea hydrolysis system; the ammonia gas application system is an SCR system.
The beneficial technical effects of the invention are as follows:
1. the in-situ online measurement system mainly comprises a measurement device, an ammonia preparation system and an ammonia application system, wherein the measurement device mainly comprises a data acquisition and control module, a laser, a collimator, an optical component, a photoelectric detector and a main control module, the optical component mainly comprises a short section, two light-passing holes are formed in the short section, and lenses are arranged in the two light-passing holes; the nipple is arranged as a part of the gas conveying pipeline on a proper measuring point on the pipeline between the ammonia preparation system and the ammonia application system, so that the ammonia output from the ammonia preparation system can directly enter the ammonia application system through the nipple; when the device works, the data acquisition and control module and the laser control module are used for controlling the laser to emit laser beams with certain frequency, the laser beams sequentially pass through the incidence lens in the light passing hole, the gas to be detected (such as ammonia gas) in the short joint and the emergent lens in the light passing hole after passing through the collimator, 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, and the data acquisition and control module calculates the concentration of the gas to be detected in the mixed gas according to the received harmonic signals, calculates, processes and stores the data and simultaneously transmits the data to the main control module so that the main control module can carry out subsequent analysis and processing of the data.
When the invention is implemented, the short joint can be directly arranged on any measuring point of the gas conveying pipeline for real-time measurement, the short joint is integrated with the pipeline as a part of the pipeline, and the temperature of the short joint can be kept consistent with the temperature of the pipeline during working, so that the generation of condensation water can be prevented to a greater extent, and the effective implementation of the in-situ measurement mode and the accuracy of the measurement result are ensured.
2. The incident lens and the emergent lens adopted by the optical component are wedge-shaped lenses, and the wedge-shaped ends of the two wedge-shaped lenses are positioned in the short joint, so that the gas flowing in the short joint can be fully detected, the dead angle of measurement is avoided, and the accuracy of the measurement result is ensured; in addition, the non-wedge ends of the two wedge lenses extend out of the pup joint, the exposed parts of the two wedge lenses are respectively provided with a heat tracing device, the exposed parts of the two wedge lenses can be kept in a certain temperature range by the heat tracing device, the whole temperature of the two wedge lenses, the pup joint and the temperature of a pipeline can be controlled on the same horizontal line, the generation of condensation water is further prevented, the light path is prevented from being interfered by external condensation water, and the effectiveness of the in-situ measurement mode and the accuracy of the measurement result are guaranteed to a greater extent.
3. When the two light-passing holes and the two wedge-shaped lenses in the optical assembly are matched with each other for use, the two light-passing holes are in a closed state, so that the whole measuring cavity is in a sealed state, the interference of light paths is prevented, and the accuracy of a measuring result is further improved.
4. The heat tracing device can be electrically connected with the temperature control module, and the temperature control module can be used for adjusting and controlling the heat tracing temperature of the heat tracing device according to actual application requirements, so that the heat tracing device has good flexibility and adaptability.
5. The nipple in the optical assembly can be a flange nipple, so that the optical assembly is convenient to install and 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 several views of the drawings. The drawings are not intended to be drawn to scale, with emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic diagram of an in-situ on-line measurement optical assembly for high concentration gas in a high temperature and high pressure pipeline according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of an in-situ on-line measurement device for high concentration gas in a high temperature and high pressure pipeline according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of an in-situ on-line measurement system for high concentration gas in a high temperature and high pressure pipeline according to one embodiment of the present invention;
in the figure: 10 is a measuring device, 20 is an ammonia preparation system, 30 is an ammonia application system, 40 is a first gas conveying pipeline, 50 is a second gas conveying pipeline, 101 is a data acquisition and control module, 102 is a laser control module, 103 is a laser, 104 is a collimator, 105 is an optical component, 106 is a photoelectric detector, 107 is a main control module, 1051 is a short section, 1052 is a first lens, 1053 is a second lens, 1054 is a heat tracing device, and 1055 is a temperature control module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Next, the present invention will be described in detail with reference to the drawings, which are only examples for convenience of illustration, 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 actual fabrication.
The invention provides an in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline, fig. 1 is a schematic structural diagram of the in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline, as shown in fig. 1, and the in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline may include: a nipple 1051 mounted to a measurement point in the pipe; the nipple 1051 is communicated with the pipeline, and the temperature of the nipple 1051 is consistent with the temperature of the pipeline when the pipe works; the nipple 1051 is provided with a first light-passing hole and a second light-passing hole, a first lens 1052 is arranged in the first light-passing hole, and a second lens 1053 is arranged in the second light-passing hole, so that a laser beam emitted by the laser source sequentially passes through the first lens 1052, the gas to be detected in the nipple 1051 and the second lens 1053 and is received by the photoelectric detection module.
The invention also provides an in-situ on-line measurement device for high-concentration gas in a high-temperature high-pressure pipeline, fig. 2 is a schematic structural diagram of the in-situ on-line measurement device for high-concentration gas in a high-temperature high-pressure pipeline, as shown in fig. 2, which 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 component 105, a photoelectric detector 106 and a main control module 107; the optical component 105 is the in-situ on-line measurement optical component described above; 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 outgoing light path of the laser 103 is adapted to the incoming light path of the collimator 104, so that the outgoing light beam of the laser 103 passes through the collimator 104 and then 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 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.
The invention also provides an in-situ on-line measurement system for high-concentration gas in a high-temperature and high-pressure pipeline, wherein the gas can be ammonia, and fig. 3 is a schematic structural diagram of the in-situ on-line measurement system for high-concentration gas in a high-temperature and high-pressure pipeline, as shown in fig. 3, and the measurement system can comprise: the device comprises a measuring device 10, an ammonia preparation system 20 and an ammonia application system 30, wherein an air outlet of the ammonia preparation system 20 and an air inlet of the ammonia application system 30 are communicated through a pipeline; the measuring device 10 is the in-situ on-line measuring device described above, and the measuring device 10 is located on a pipeline between the ammonia gas producing system 20 and the ammonia gas application system 30.
The in-situ online measurement system in the embodiment mainly comprises a measurement device, an ammonia preparation system and an ammonia application system, wherein the measurement device mainly comprises a data acquisition and control module, a laser, a collimator, an optical component, a photoelectric detector and a main control module, the optical component mainly comprises a short joint, two light-passing holes are formed in the short joint, and lenses are arranged in the two light-passing holes; the nipple is arranged as a part of the gas conveying pipeline on a proper measuring point on the pipeline between the ammonia preparation system and the ammonia application system, so that the ammonia output from the ammonia preparation system can directly enter the ammonia application system through the nipple; when the device works, the data acquisition and control module and the laser control module are used for controlling the laser to emit laser beams with certain frequency, the laser beams sequentially pass through the incidence lens in the light passing hole, the gas to be detected (such as ammonia gas) in the short joint and the emergent lens in the light passing hole after passing through the collimator, 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, and the data acquisition and control module calculates the concentration of the gas to be detected in the mixed gas according to the received harmonic signals, calculates, processes and stores the data and simultaneously transmits the data to the main control module so that the main control module can carry out subsequent analysis and processing of the data.
When the invention is implemented, the short joint can be directly arranged on any measuring point of the gas conveying pipeline for real-time measurement, the short joint is integrated with the pipeline as a part of the pipeline, and the temperature of the short joint can be kept consistent with the temperature of the pipeline during working, so that the generation of condensation water can be prevented to a greater extent, and the effective implementation of the in-situ measurement mode and the accuracy of the measurement result are ensured.
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 line center frequency ѵ by adjusting the temperature and current of the laser control module 102 0 =6528.69 cm -1 Where it is located.
Specifically, the main control module 107 may be a DCS system.
Further, in the in-situ on-line measurement system for high concentration gas in a high temperature and high pressure pipeline, the pipeline may include: a first gas delivery conduit 40 and a second gas delivery conduit 50; one end of a nipple 1051 in the measuring device 10 is communicated with the air outlet of the ammonia gas preparing system 20 through the first gas conveying pipeline 40, and the other end of the nipple 1051 is communicated with the air inlet of the ammonia gas applying system 30 through the second gas conveying pipeline 50.
Furthermore, the nipple 1051 may be a flange nipple, which is convenient for installation and use; the ammonia production system 20 may be a urea hydrolysis system; the ammonia gas application system 30 may be an SCR system.
Further, in the in-situ on-line 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 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 nipple 1051; a portion of the non-wedge end of the first lens 1052 and a portion of the non-wedge end of the second lens 1053 are both located outside the nipple 1051, and the non-wedge end of the first lens 1052 and the non-wedge end of the second lens 1053 located outside the nipple 1051 are both provided with heat tracing devices 1054.
The incident lens and the emergent lens adopted by the optical component in the embodiment are wedge-shaped lenses, and the wedge-shaped ends of the two wedge-shaped lenses are positioned in the short joint, so that the gas flowing in the short joint can be fully detected, the dead angle of measurement is avoided, and the accuracy of the measurement result is ensured; in addition, the non-wedge ends of the two wedge lenses extend out of the pup joint, the exposed parts of the two wedge lenses are respectively provided with a heat tracing device, the exposed parts of the two wedge lenses can be kept in a certain temperature range by the heat tracing device, the whole temperature of the two wedge lenses, the pup joint and the temperature of a pipeline can be controlled on the same horizontal line, the generation of condensation water is further prevented, the light path is prevented from being interfered by external condensation water, and the effectiveness of the in-situ measurement mode and the accuracy of the measurement result are guaranteed to a greater extent.
Further, the first light-passing hole and the second light-passing hole may be symmetrically disposed with respect to the radial direction and the axial direction of the nipple 1051; the inclined surface of the wedge-shaped end of the first lens 1052 positioned inside the short section 1051 is parallel to the inclined surface of the wedge-shaped end of the second lens 1053.
Still further, the shape and size of the portion of the first lens 1052 located in the first light-passing hole is 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 located in the second light-passing hole are matched with the shape and size of the second light-passing hole, so that the second light-passing hole is in a sealed state.
When the two light-passing holes and the two wedge-shaped lenses in the optical assembly are matched with each other for use in the embodiment, the two light-passing 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.
Still further, the heat trace device 1054 may be electrically connected to a temperature control module 1055.
The heat tracing device in the embodiment can be electrically connected with the temperature control module, and the temperature of the heat tracing device can be adjusted and controlled according to actual application requirements through the temperature control module, so that the heat tracing device has good flexibility and adaptability.
Further, the heat tracing temperature of the heat tracing device 1054 is identical to the temperature of the pipe.
Specifically, an electric tracing or steam tracing system can be arranged on the whole nipple and the gas conveying pipeline according to actual requirements, and the temperature of the tracing 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 normal conditions.
Specifically, the heat tracing device 1054 may be an electric heat tracing coil. In practical applications, in order to ensure that the light path is not interfered by the external condensation water, the temperature of the heat tracing device 1054 may not be lower than 150 ℃.
The invention is used for measuring the concentration of the ammonia gas generated after the urea catalytic hydrolysis reaction in the process of using the ammonia gas generated by the urea catalytic hydrolysis to denitrate the coal-fired flue gas of the thermal power plant, can directly measure the concentration of the ammonia gas on line under the condition of not changing the working condition of the high-temperature high-pressure ammonia gas mixture on site, solves the problems of measurement error caused by the change of the working condition (temperature T, pressure P and flow Q) of the gas introduced by measurement and the problems of measurement lag and precision reduction introduced by extraction and dilution indirect measurement in the existing measurement means by optimizing and optimally arranging the structure of a measurement window and carrying out heat tracing on the window, and has outstanding substantive characteristics and remarkable progress.
In the description of the present invention, it should be understood that the terms "symmetrical," "radial," "axial," and the like indicate an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "provided," and "disposed" are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to the terms "one embodiment," "example," "specific example," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the above-described assemblies, devices and systems may be referenced to one another. In addition, the "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent the merits and merits of the embodiments.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the above-described system and module may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein. Furthermore, in the embodiments provided in the present application, it should be understood that the disclosed systems and apparatuses may be implemented in other manners.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. An in-situ on-line measurement optical assembly for high-concentration gas in a high-temperature high-pressure pipeline, wherein the gas is ammonia gas, and the in-situ on-line measurement optical assembly is characterized in that: the in-situ on-line measurement optical component is positioned on a pipeline between the ammonia gas preparation system (20) and the ammonia gas application system (30);
the in-situ on-line measurement optical component comprises: a nipple (1051) mounted on a measurement point in the pipe;
the nipple (1051) is communicated with the pipeline, and the temperature of the nipple (1051) is consistent with the temperature of the pipeline when the pipe is in operation;
the pipe includes: a first gas delivery conduit (40) and a second gas delivery conduit (50);
one end of the short section (1051) 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);
a first light through hole and a second light through hole are formed in the short section (1051), 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 a 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;
-the first lens (1052) and the second lens (1053) are 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 nipple (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 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), wherein the heat tracing temperature of the heat tracing devices (1054) is consistent with the temperature of the pipeline;
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 inclined plane of the wedge-shaped end of the first lens (1052) positioned in the short section (1051) is parallel to the inclined plane of the wedge-shaped end of the second lens (1053);
the shape and the size of the part of the first lens (1052) positioned in the first light-passing hole are matched with the shape and the size of the first light-passing hole, so that the first light-passing hole is in a sealing state;
the shape and the size of the part of the second lens (1053) positioned in the second light-passing hole are matched with the shape and the size of the second light-passing hole, so that the second light-passing hole is in a sealing state.
2. The in-situ online measurement optical assembly for high concentration gas in high temperature and high pressure pipelines of claim 1, wherein: the heat tracing device (1054) is electrically connected with the temperature control module (1055).
3. An in-situ on-line measurement device for high concentration gas in a high temperature and high pressure pipeline, comprising: 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 online measurement optical component according to any one of claims 1-2;
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), an emergent light path of the laser (103) is adapted to an incident light path of the collimator (104), so that emergent light beams of the laser (103) pass through the collimator (104) and then enter a 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 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).
4. An in-situ, on-line measurement system for high concentration gas in a high temperature, high pressure pipeline, the measurement system comprising: the device comprises a measuring device (10), an ammonia preparation system (20) and an ammonia application system (30), wherein an air outlet of the ammonia preparation system (20) is communicated with an air inlet of the ammonia 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 claimed in claim 3.
5. The in-situ, on-line measurement system for high concentration gas in high temperature and high pressure piping of claim 4, wherein:
the nipple (1051) is a flange nipple;
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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Citations (7)
| 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 |
| CN105259137A (en) * | 2015-11-04 | 2016-01-20 | 安徽中科智泰光电测控科技有限公司 | Automatic absorption spectrum online in-situ measuring device for laser ammonia escape of pipeline |
| EP3211389A1 (en) * | 2016-02-29 | 2017-08-30 | Siemens Aktiengesellschaft | In-situ laser spectrometer |
| CN206557091U (en) * | 2017-01-23 | 2017-10-13 | 安徽蓝盾光电子股份有限公司 | Toxic and harmful gas on-line monitoring system based on TDLAS technologies |
| CN206710305U (en) * | 2017-04-22 | 2017-12-05 | 杭州春来科技有限公司 | A kind of in-situ type laser gas analyzer based on TDLAS technologies |
| CN109696417A (en) * | 2019-02-01 | 2019-04-30 | 清华大学 | A kind of measuring system of the line parameters based on gas absorption spectra |
| CN210071641U (en) * | 2019-05-13 | 2020-02-14 | 清华大学 | In-situ on-line measurement optical assembly, device and system for high-concentration gas in high-temperature high-pressure pipeline |
-
2019
- 2019-05-13 CN CN201910415517.XA patent/CN110243761B/en active Active
Patent Citations (7)
| 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 |
| CN105259137A (en) * | 2015-11-04 | 2016-01-20 | 安徽中科智泰光电测控科技有限公司 | Automatic absorption spectrum online in-situ measuring device for laser ammonia escape of pipeline |
| EP3211389A1 (en) * | 2016-02-29 | 2017-08-30 | Siemens Aktiengesellschaft | In-situ laser spectrometer |
| CN206557091U (en) * | 2017-01-23 | 2017-10-13 | 安徽蓝盾光电子股份有限公司 | Toxic and harmful gas on-line monitoring system based on TDLAS technologies |
| CN206710305U (en) * | 2017-04-22 | 2017-12-05 | 杭州春来科技有限公司 | A kind of in-situ type laser gas analyzer based on TDLAS technologies |
| CN109696417A (en) * | 2019-02-01 | 2019-04-30 | 清华大学 | A kind of measuring system of the line parameters based on gas absorption spectra |
| CN210071641U (en) * | 2019-05-13 | 2020-02-14 | 清华大学 | In-situ on-line measurement optical assembly, device and system for high-concentration gas in high-temperature high-pressure pipeline |
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