CN110806393A - Detection device and method applied to flue gas condenser - Google Patents
Detection device and method applied to flue gas condenser Download PDFInfo
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- CN110806393A CN110806393A CN201911071412.3A CN201911071412A CN110806393A CN 110806393 A CN110806393 A CN 110806393A CN 201911071412 A CN201911071412 A CN 201911071412A CN 110806393 A CN110806393 A CN 110806393A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 4
- 239000007789 gas Substances 0.000 claims abstract description 63
- 239000011521 glass Substances 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 16
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 7
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 5
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 1
- 238000010408 sweeping Methods 0.000 claims 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 10
- 230000005494 condensation Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010583 slow cooling 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
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
- G01N25/142—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation by condensation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a detection device and a detection method applied to a flue gas condenser, wherein the detection device comprises the following steps: humidity generator, sampling probe, heat tracing pipe, condenser, air pump, condensing glass tube, peristaltic pump, high precision (mirror) dew point detector, high and low temperature box. The high-precision (mirror surface) dew point detector comprises a closed air chamber, a mirror surface, a light-emitting diode, a photoelectric sensor, a platinum resistor temperature sensor, a driving hot spot pump and a discharge loop. The humidity generator can generate humidity-adjustable aerial fog, the aerial fog is conveyed to the condenser from the sampling probe through the heat tracing pipe through the air pump, and the gas is heated through the heat tracing pipe and flows to the condenser to be cooled to below 4 ℃. The condenser is internally provided with a condensing glass tube which is of a serpentine structure so as to extend a gas path, the dew point detector is arranged in an outlet gas pipe of the condensing glass tube, and the dew point detector detects the gas dew point in real time and feeds the gas dew point back to the control unit to control the cooling operation of the condenser.
Description
Technical Field
The invention relates to the technical field of detection of flue gas condensers, and provides a detection device and a detection method applied to a flue gas condenser.
Background
In industrial production, a large amount of flue gas is inevitably generated, and the emission of the flue gas is required to be executed according to national emission standards; before the smoke is discharged by each factory, the smoke is detected and analyzed so as to judge whether the content of each pollutant in the smoke meets the national emission standard.
The smoke detection is completed in a smoke analyzer, and before entering the smoke analyzer, a smoke sample is usually subjected to water-gas separation, namely, water-gas in smoke is separated from substances such as smoke, and the like, because the water-gas affects detection results of other factors in the smoke detection and analysis process, the detection is inaccurate; moreover, moisture can also damage the detection components in the flue gas analyzer.
The refrigeration equipment for separating water and gas in the prior art has poor refrigeration efficiency, slow cooling speed and longer time consumed by water and gas separation, and can not completely separate water and gas; the water-gas separation is not thorough, which reduces the reliability of the measurement result, and also reduces the service life of the condenser, increases the maintenance times thereof, and thus increases the operation cost.
The traditional condenser mainly detects the temperature of a condensation cavity of a condensation pipe, does not detect the dew point of the condenser in real time, and cannot accurately control the gas humidity. After long-time use, moisture in the flue gas and the like can be accumulated on the surface of the cavity, and the detection precision is influenced.
Disclosure of Invention
The invention aims to provide a detection device and a detection method applied to a flue gas condenser, and aims to solve the technical problems that refrigeration equipment in the prior art cannot directly detect the temperature of flue gas, cannot control whether a refrigeration source is input or not, cannot achieve a good water-gas separation effect, wastes energy and increases operation cost.
The invention relates to the technical field of detection of flue gas condensers, and provides a detection device and a detection method applied to a flue gas condenser, wherein the detection device comprises the following steps: humidity generator, sampling probe, heat tracing pipe, condenser, air pump, condensing glass tube, peristaltic pump, high precision (mirror) dew point detector, high and low temperature box. The high-precision (mirror surface) dew point detector comprises a closed air chamber, a mirror surface, a light emitting diode, a photoelectric sensor, a platinum resistor temperature sensor, a driving hot spot pump and a discharge loop. The humidity generator can generate humidity-adjustable aerial fog, the aerial fog is conveyed to the heat tracing pipe from the sampling probe and the heat tracing pipe through the air pump, the heat tracing pipe is connected with the condenser, and gas is heated through the heat tracing pipe and flows to the condenser to be cooled to a temperature below 4 ℃. The condenser is internally provided with the condensing glass tube which is of a snake-shaped structure so as to prolong a gas path, and the high-precision (mirror surface) dew point detector is arranged in an outlet gas pipe of the condensing glass tube, detects a gas dew point in real time and feeds the gas dew point back to the control unit to control the cooling operation of the condenser.
Further, the detection device and the detection method applied to the flue gas condenser are characterized in that the humidity generator can generate humidity-adjustable aerial fog, the aerial fog is conveyed to the heat tracing pipe from the sampling probe and the heat tracing pipe through the air pump, the heat tracing pipe is connected with the condenser, and the gas is heated through the heat tracing pipe and flows to the condenser to be cooled to a temperature below 4 ℃. The condenser is internally provided with the condensing glass tube which is of a snake-shaped structure so as to prolong a gas path, and the high-precision (mirror surface) dew point detector is arranged in an outlet gas pipe of the condensing glass tube, detects a gas dew point in real time and feeds the gas dew point back to the control unit to control the cooling operation of the condenser.
Specifically, the high-precision (mirror surface) dew point detector can detect the humidity temperature of an inlet and an outlet of a condenser in real time, gas passes through a closed air chamber at a certain flow rate under constant pressure, measured gas passes through a dew point measuring chamber and sweeps over a cold mirror surface, when the temperature of the mirror surface is higher than the dew point temperature of the gas, the mirror surface is in a dry state, at the moment, light emitted by a light emitting diode is irradiated on the mirror surface and almost completely reflected, an optical electrical signal is sensed and output by a photoelectric sensor, the optical electrical signal is compared and amplified by a control loop, a thermoelectric pump is driven to cool the mirror surface, when the temperature of the mirror surface is reduced to the dew point temperature of sample gas, the dew condensation starts on the mirror surface, the diffuse reflection appears after the light is irradiated on the mirror surface, the reflected light signal sensed by the photoelectric sensor is weakened, the change is compared and amplified by the control loop, the excitation of the thermoelectric pump is adjusted, the refrigerating power of the thermoelectric pump is reduced, and, the temperature of the mirror surface is sensed by a platinum resistance temperature sensor which is tightly attached to the lower part of the cold mirror surface, and the temperature of the mirror surface (namely the temperature of an exposed layer) is accurately measured, so that the dew point temperature of the gas is obtained.
Furthermore, the high-precision (mirror surface) dew point detector has the advantages that the testing device can detect parameters of dew points of an inlet and an outlet of the condenser, the service life, the fault-free operation time, the refrigeration efficiency and the instrument power, and the measurable precision can reach 0.1 ℃.
Specifically, the high-low temperature box is used for manufacturing high-low temperature test environments, the temperature range is controlled to be 2-90 ℃, the aging of the condenser parts is accelerated, and the high-low temperature box is used for measuring the service life of the condenser.
Compared with the prior art, the invention has the beneficial effects that:
the invention improves the problems, designs a rapid and accurate detection method of the condenser, can detect the dew point of the gas of the condenser in real time by utilizing the detection principle of infrared spectrum absorption, sensitively feeds back the dew point to a control system to strengthen the condensation dehumidification effect, and can effectively prevent moisture from entering an analysis system to interfere the measurement, thereby further improving the monitoring quality of the flue gas on-line monitoring system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a detection apparatus applied to a flue gas condenser according to an embodiment of the present invention.
Fig. 2 is a measurement schematic diagram of a high-precision (mirror) dew point detector.
Wherein the reference numerals are summarized as follows:
the device comprises a sampling probe 1, an air pump 2, a condensing glass tube 3, a condenser 4, a peristaltic pump 5, a high-precision (mirror surface) dew point detector 6, a humidity generator 7 and a high-low temperature box 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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 "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic connection diagram of a detection device applied to a flue gas condenser according to an embodiment of the present invention; FIG. 2 is a schematic diagram of the measurement of a high precision (mirror) dew point detector;
as shown in fig. 1, the detecting device applied to the flue gas condenser provided by this embodiment includes: the device comprises a humidity generator 7, a sampling probe 1, a heat tracing pipe, a condenser 4, an air pump 2, a condensing glass pipe 3, a peristaltic pump 5, a high-precision (mirror surface) dew point detector 6 and a high-low temperature box 8. The high-precision (mirror surface) dew point detector 6 comprises a closed air chamber, a mirror surface, a light-emitting diode, a photoelectric sensor, a platinum resistor temperature sensor, a driving hot spot pump and a discharge loop. Humidity generator 7 can produce humidity adjustable aerial fog, through aspiration pump 2 carries aerial fog from sampling probe 1 and heat tracing pipe condenser 4 extremely the heat tracing pipe, the heat tracing pipe is connected condenser 4, and gas passes through the heat tracing pipe and heats up, flows to condenser 4 and cools off to below 4 ℃. The condenser 4 is internally provided with the condensing glass tube 3, the condensing glass tube 3 is of a snake-shaped structure to prolong a gas path, and the high-precision (mirror surface) dew point detector 6 is arranged in an outlet gas pipe of the condensing glass tube 3, detects a gas dew point in real time and feeds the gas dew point back to the cooling operation of the condenser 4.
Further, the detection device and the detection method applied to the flue gas condenser are characterized in that the humidity generator can generate humidity-adjustable aerial fog, the aerial fog is conveyed to the heat tracing pipe from the sampling probe 1 and the heat tracing pipe through the air pump 2, the heat tracing pipe is connected with the condenser 4, and gas is heated through the heat tracing pipe and flows to the condenser 4 to be cooled to a temperature below 4 ℃. The condenser is internally provided with the condensing glass tube 3, the condensing glass tube 3 is of a snake-shaped structure to prolong a gas path, and the high-precision (mirror surface) dew point detector 6 is arranged in an outlet gas pipe of the condensing glass tube 3, detects a gas dew point in real time and feeds the gas dew point back to the cooling operation of the condenser 4.
As shown in FIG. 2, the high-precision (mirror) dew point detector 6 can detect the humidity and temperature of the inlet and outlet of the condenser 4 in real time, the gas passes through the closed air chamber at a certain flow rate under a constant pressure, the measured gas passes through the dew point measuring chamber and sweeps across the cold mirror surface, when the temperature of the mirror surface is higher than the dew point temperature of the gas, the mirror surface is in a dry state, at the moment, the light emitted by the light emitting diode is irradiated on the mirror surface and almost completely reflected, the photoelectric signal is sensed and outputted by the photoelectric sensor, the comparison and amplification are carried out by the control loop, the thermoelectric pump is driven, the mirror surface is cooled, when the temperature of the mirror surface is reduced to the dew point temperature of the sample gas, the dew condensation starts on the mirror surface, the diffuse reflection appears after the light is irradiated on the mirror surface, the reflected light signal sensed by the photoelectric sensor is weakened accordingly, the change, thus, the dew on the cold mirror surface is in a state of being balanced with the vapor in the gas through automatic control, the temperature of the mirror surface is sensed by a platinum resistance temperature sensor which is tightly attached to the lower part of the cold mirror surface, and the temperature of the mirror surface (namely the temperature of a dew layer) is accurately measured, so that the dew point temperature of the gas is obtained.
Furthermore, the high-precision (mirror surface) dew point detector 6 can detect parameters of dew points of an inlet and an outlet of a condenser, service life, fault-free operation time, refrigeration efficiency and instrument power, and the measurable precision can reach 0.1 ℃.
Specifically, the high-low temperature box 8 is used for manufacturing a high-low temperature test environment, the temperature range is controlled to be 2-90 ℃, the aging of the condenser 4 is accelerated, and the service life of the condenser is measured.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The invention relates to the technical field of detection of flue gas condensers, and provides a detection device and a detection method applied to a flue gas condenser, which are characterized by comprising the following steps: a humidity generator, a sampling probe, a heat tracing pipe, a condenser, an air pump, a condensing glass pipe, a peristaltic pump, a high-precision (mirror surface) dew point detector and a high-low temperature box; the high-precision (mirror surface) dew point detector comprises a closed air chamber, a mirror surface, a light-emitting diode, a photoelectric sensor, a platinum resistor temperature sensor, a driving hot spot pump and a discharge loop; the humidity generator can generate humidity-adjustable aerial fog, the aerial fog is conveyed to the heat tracing pipe from the sampling probe and the heat tracing pipe through the air pump, the heat tracing pipe is connected with the condenser, and the gas is heated through the heat tracing pipe and flows to the condenser to be cooled to below 4 ℃; the condenser is internally provided with the condensing glass tube which is of a snake-shaped structure so as to extend a gas path, and the dew point detector is arranged in a gas pipe at the outlet of the condensing glass tube, detects the gas dew point in real time and feeds the gas dew point back to the control unit to control the cooling operation of the condenser.
2. The detection device and the method applied to the flue gas condenser are characterized in that the humidity generator can generate humidity-adjustable aerosol, the aerosol is conveyed to the condenser from the sampling probe and the heat tracing pipe through the air suction pump, the heat tracing pipe is connected with the condenser, and the gas is heated through the heat tracing pipe and flows to the condenser to be cooled to below 4 ℃; the condenser is internally provided with the condensing glass tube which is of a snake-shaped structure so as to extend a gas path, and the dew point detector is arranged in a gas pipe at the outlet of the condensing glass tube, detects the gas dew point in real time and feeds the gas dew point back to the control unit to control the cooling operation of the condenser.
3. The high accuracy dew point detector of claim 1, wherein the high accuracy dew point detector is capable of detecting the humidity of the inlet and outlet of the condenser in real time, passing the gas through the closed gas chamber at a constant flow rate, sweeping the measured gas across the cold mirror surface when passing through the dew point measuring chamber, drying the mirror surface when the temperature of the mirror surface is higher than the dew point temperature of the gas, wherein the light emitted from the light emitting diode is reflected almost completely by the mirror surface, and the photoelectric sensor senses and outputs an optical signal, which is compared and amplified by the control loop, driving the thermo-electric pump, cooling the mirror surface, and when the temperature of the mirror surface is lowered to the dew point temperature of the sample gas, the mirror surface begins to dew, and the light is diffusely reflected by the mirror surface, and the reflected optical signal sensed by the photoelectric sensor is reduced, and the change is compared and amplified by the control loop, and then the thermo-electric pump is adjusted, the refrigeration power is reduced, so that the dew on the cold mirror surface is in a state of phase equilibrium with the vapor in the gas through automatic control, the temperature of the mirror surface is sensed by a platinum resistance temperature sensor tightly attached to the lower part of the cold mirror surface, and the temperature of the mirror surface (namely the temperature of a dew layer) is accurately measured, thereby obtaining the dew point temperature of the gas.
4. The high precision (mirror) dew point detector as claimed in claim 3, wherein the testing device can detect the parameters of dew point of the inlet and outlet of the condenser, service life, fault-free operation time, refrigeration efficiency and instrument power, and the measurable precision can reach 0.1 ℃.
5. The high and low temperature tank as claimed in claim 1, wherein the high and low temperature tank is used for manufacturing high and low temperature test environment, the temperature is controlled to be 2-90 ℃, the aging of the condenser components is accelerated, and the aging is used for measuring the service life of the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911071412.3A CN110806393A (en) | 2019-11-05 | 2019-11-05 | Detection device and method applied to flue gas condenser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911071412.3A CN110806393A (en) | 2019-11-05 | 2019-11-05 | Detection device and method applied to flue gas condenser |
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2019
- 2019-11-05 CN CN201911071412.3A patent/CN110806393A/en active Pending
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