CN112858387B - Dew point detection device capable of filtering gas - Google Patents
Dew point detection device capable of filtering gas Download PDFInfo
- Publication number
- CN112858387B CN112858387B CN202011606608.0A CN202011606608A CN112858387B CN 112858387 B CN112858387 B CN 112858387B CN 202011606608 A CN202011606608 A CN 202011606608A CN 112858387 B CN112858387 B CN 112858387B
- Authority
- CN
- China
- Prior art keywords
- detection
- gas
- dew point
- mirror surface
- mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 134
- 238000001914 filtration Methods 0.000 title claims abstract description 51
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 230000006978 adaptation Effects 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000005284 excitation Effects 0.000 claims description 17
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 8
- 239000012982 microporous membrane Substances 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000009833 condensation Methods 0.000 abstract description 48
- 230000005494 condensation Effects 0.000 abstract description 48
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 81
- 238000001816 cooling Methods 0.000 description 16
- 238000005259 measurement Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 4
- -1 metallurgy Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 239000010948 rhodium Substances 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001274961 Rubus repens Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003373 anti-fouling effect 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- 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 Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a but gaseous dew point detection device of filter, includes control system, dewfall system, photoelectric detection system connect respectively in control system, photoelectric detection system includes detection subassembly and detects the lid, be equipped with the detection chamber in the detection lid, dewfall system is located detect the chamber bottom, detection subassembly is located detect the chamber top, it is equipped with corresponding through-hole to detect the lid lateral wall, still includes gas filtering device, gas filtering device with the through-hole adaptation sets up, or covers and locate dewfall system top. The dew point detection device provided by the invention can filter and detect pollutants in gas, has excellent filtering effect of the PTFE film, reduces the mirror surface scattering level, prevents mirror surface pollution from zero drift, prolongs the service life of the device, saves space due to the design of the gas filtering device and the structure of a condensation system, reduces the volume of the device, is convenient to carry, and can improve brightness and save energy by using laser.
Description
Technical Field
The invention relates to the technical field of dew condensation measurement, in particular to a dew point detection device capable of filtering gas.
Background
The dew point detecting device is an instrument capable of directly detecting the dew point temperature. And cooling one mirror surface in the wet gas of the sample until the moment that dew drops (or ice crystals) are hidden on the mirror surface, and measuring the average temperature of the mirror surface, namely the dew (frost) point temperature. It has high humidity measuring precision, but needs mirror surface with high smoothness, temperature control system with high precision and optical detecting system with high sensitivity.
In the working environments of natural gas, metallurgy, health quarantine, toxic or corrosive gases and the like, water vapor in the gas has an important influence on the operation. And the dew point temperature of the gas is often detected by a dew point sensor at present, so that the humidity in the gas is indirectly measured.
Dew point sensors can be classified into various types according to the cooling method and the detection control method used. The dew point sensor can cool the dew layer sensor by using a thermoelectric refrigerator (Peltier element), so that water vapor in the gas is condensed on the dew layer sensor to generate dew or frost, meanwhile, the dew or frost on the dew layer sensor and the water vapor in the gas are in a phase balance state by using a signal acquired by the receiver through an automatic control circuit, and then the temperature of the dew layer sensor, namely the temperature of the dew or frost layer, is accurately measured by using a thermometer, so that the dew point temperature of the gas is obtained, and the humidity in the gas is indirectly measured. The dew layer sensor comprises a mirror surface, a luminous tube, a receiving tube or a surface acoustic wave device and other components.
The dew point temperature of the gas is obtained by cooling vapor in the gas until condensed phase appears under the isobaric condition, and then controlling the temperature of the dew layer sensor to make the vapor in the gas and the flat surface of water or ice in a thermodynamic equilibrium state, wherein the temperature of the dew layer is the dew point temperature of the gas.
In the prior art, the dew point sensor consists of a heat radiation system, a thermoelectric refrigerating system, a precise temperature measuring resistor, photoelectric detection, a mirror surface and other parts. In the practical application field, the dew point sensor has corresponding requirements on the volume, the adaptive capacity of dust pollution environment, the measurement temperature difference limit, the sealing gas pressure resistance, the corrosion resistance and the like, and part of the dew point sensor has larger volume.
The conventional dew point sensor uses the kovar alloy as a heat dissipation part, but the kovar alloy has relatively poor heat conductivity and poor heat dissipation performance, so that the measurement temperature difference limit is lower, and the temperature measurement result is inaccurate.
The conventional dew point sensor has poor sealing performance, when the humidity of gas is detected, partial vapor permeates into the dew point sensor in the condensation process of the vapor in the working environment on the dew layer of the dew point sensor, so that circuits and other components in the dew point sensor are damaged, and the service life of the dew point sensor is reduced. In addition, when the operation environment containing poisonous or corrosive gas is detected, the poisonous or corrosive gas can be leaked outside from the operation environment through the dew point sensor, and the life safety of workers is threatened.
In dew point measurement, specular contamination is a prominent problem, and its impact is mainly manifested in two ways; the Raoult effect is the first, and the specular background emission level is changed. The Raoult effect is caused by water-soluble substances. If the detected gas carries the substance (generally soluble salt), the mirror surface is condensed in advance, so that the measurement result is positively deviated. If the contaminants are water-insoluble particles, such as dust, the background scattering level is increased, causing zero drift in the dew condensation system. In addition, some vapors of readily condensable substances (e.g., organics) having a lower boiling point than water, it is self-evident that will interfere with the measurement of dew point. Therefore, any type of condensation system should be protected from contaminating the mirror. In general, the impact of industrial process gas analysis contamination is severe. However, even in the measurement of pure gas, the contamination of the mirror surface increases with time and accumulates.
Disclosure of Invention
The present invention aims to overcome at least one of the above-mentioned drawbacks (shortcomings) of the prior art by providing a dew point detection device for filterable gases, which is used for solving the problems of filtering and detecting the pollutants of the gases, reducing the mirror pollution and preventing the occurrence of zero drift.
The technical proposal adopted by the invention is that,
the utility model provides a but gaseous dew point detection device of filter, includes control system, dewfall system, photoelectric detection system connect respectively in control system, photoelectric detection system includes detection subassembly and detects the lid, be equipped with in the detection lid and detect the chamber, dewfall system is located detect the chamber bottom, detection subassembly is located detect the chamber top, it is equipped with corresponding through-hole to detect the lid lateral wall, still includes gas filtering device, gas filtering device with the through-hole adaptation sets up, perhaps cover in dewfall system top.
In this scheme control system control detection component and dewfall system work, gaseous pollutant in through gas filter equipment filtration gas prevents impurity pollution mirror surface, prevent that photoelectricity dew point system from taking place zero drift, reduce the mirror surface scattering level, the gaseous detection chamber that reachs after the filtration, dewfall system cooling makes gaseous production dewfall on the dewfall system, it can avoid the air current fluctuation to influence the testing result to detect intracavity dewfall, make the testing result inaccurate, detection component monitors dew point temperature, return to control system on, obtain dew point temperature, improve testing temperature's accuracy.
Preferably, the area of the gas filtering device is larger than the area of the through hole.
In this scheme, gas filter area is greater than the through-hole area can make gas filter cover the through-hole completely, and the complete filtration detects gas, detects gas and obtains purifying, prevents that unfiltered gas from revealing into the detection chamber, avoids the granule of insoluble water to adhere to on the mirror surface at the dewfall in-process and pollutes the mirror surface, influences dew point temperature's measured value.
Preferably, the gas filtering device is a multi-layer PTFE microporous membrane, and has the function of filtering all dust particles including bacteria.
The PTFE microporous membrane in the scheme can be used for atmospheric dust removal, gas purification and the like, has high filtration efficiency which can reach 99.99 percent and is close to zero emission; the running resistance is low, and the filtering speed is high; long service life and repeated use, thereby reducing the running cost. Can be used for the flue gas filtration of various industrial melting furnaces such as chemical industry, iron and steel, metallurgy, carbon black, power generation, cement, garbage incineration and the like. After the detection gas is filtered by the PTFE microporous membrane, condensation is performed at a low temperature of a condensation system, and the dew point temperature is detected by the detection component, so that the accuracy of detecting the condensation is improved.
Preferably, the detection cover body is of a solid structure and is provided with an outer wall and an inner wall, the through hole extends from the outer wall to the inner wall, an inner cavity is arranged between the outer wall and the inner wall, and the gas filtering device is embedded into the inner cavity and corresponds to the through hole.
The detection lid is the entity structure in this scheme, and the lateral wall is equipped with corresponding through-hole, and the through-hole extends to the inner wall by the outer wall, detects lid middle part formation detection chamber, and the inner chamber between outer wall and the inner wall can imbed gas filter and correspond the through-hole, saves space promptly and conveniently filters gas again.
Preferably, the dew condensation system comprises a four-wire platinum resistor as a thermometer, and a heat conduction silicone grease layer or a heat conduction adhesive layer is arranged on the outer surface of the thermometer; the upper surface of the refrigerating sheet is a refrigerating surface, and the lower surface of the refrigerating sheet is a radiating surface; the lower surface of the heat conduction structure is connected with the refrigerating surface so as to transfer the cold energy of the refrigerating surface to the upper surface of the heat conduction structure, and the heat conduction structure is also connected with the thermometer; the lower surface of the mirror surface is connected with the upper surface of the heat conducting structure so as to transfer the cold energy of the upper surface of the heat conducting structure to the upper surface of the mirror surface, so that water vapor in the working environment is condensed on the upper surface of the mirror surface; the side face of the sealing ring surrounds the heat conducting structure to form a frame body and wraps the periphery of the mirror face.
In this scheme the thermometer is through detecting the temperature of heat conduction structure, and the temperature of mirror surface is measured to the indirect measurement to measure the temperature of steam. The refrigerating plate is based on thermoelectric refrigerating principle, the refrigerating surface forms cold energy to act on the heat conducting structure, and the radiating surface forms heat to act on the part connected with the radiating surface. The heat conducting structure is used for transmitting the cold energy from the refrigerating sheet to the mirror surface. The upper surface of the mirror surface is a place for condensation. The sealing ring wraps the periphery of the mirror surface, so that water vapor is prevented from penetrating into the interior where the dew condensation system is applied through the dew condensation system, and damage is caused to circuits and components in the interior. Meanwhile, the sealing ring surrounds the heat conducting structure and is surrounded by the heat conducting structure, so that the heat conducting structure is prevented from being damaged by water vapor, and the water vapor is prevented from penetrating into the heat conducting structure.
Preferably, the gas filtering device covers the mirror surface, and the height of the gas filtering device is located between the mirror surface and the through hole.
In the scheme, the gas filtering device is positioned on the mirror surface, the height of the gas filtering device is between the mirror surface and the through hole, water-insoluble particles in gas are prevented from being attached to the mirror surface, the detected gas is completely filtered between the through hole and the mirror surface, the gas filtering device can be used within the temperature range of-70 ℃ to 230 ℃, the condensation of the mirror surface is not affected, the gas filtering device has high light transmittance, and chemical corrosion is prevented.
Preferably, a clamping groove is formed in the top of the detection cavity, the detection assembly is embedded into the clamping groove, and the detection assembly is connected with the control system.
The detection lid is equipped with the detection upper cover in this scheme, detects the chamber top and just detects the upper cover and be equipped with the draw-in groove, not only can fix the detection component, avoids the damage in the use, still practices thrift the space in the detection chamber, more can increase the gas flow space.
Preferably, the detection assembly comprises a laser light source and a receiving light assembly, wherein the laser light source emits excitation light, and the receiving light assembly receives the excitation light reflected by the laser light source through the mirror surface.
The laser light source is selected in the scheme, the response speed of the laser is high, the brightness attenuation is low, the reflection or scattering is clearer, the laser light source is small in size, the internal space is reduced, the laser energy consumption is low, the service life is long, the frequent replacement of the light source is avoided, and the thickness of condensate is detected.
Preferably, the laser light source and the light receiving component are respectively provided with one, and the laser light source and the light receiving component are in an integrated structure.
In this scheme, laser is in the integral type structure in receiving assembly and can practice thrift the inner space that detects the lid, increase gas flow space.
Preferably, one laser light source is arranged, a plurality of receiving light assemblies are arranged, and the excitation light and the mirror face form an angle of 60-90 degrees.
The laser light source is equipped with one in this scheme, and the light receiving module is equipped with a plurality ofly, and the excitation light can form regular reflection light and scattered light, and the light detection mode of mirror surface can be the scattered light detection mode that utilizes scattered light, also can be the regular reflection light detection mode that utilizes regular reflection light, can detect dew position and dew thickness through different angle reflected light simultaneously in the testing process to compare the testing result simultaneously, improve the rate of accuracy that detects, excitation light and mirror surface are the angle, can reduce reflection range, reduce the volume of detecting the chamber, make detection device more small and exquisite convenient, convenient to carry.
Compared with the prior art, the invention has the beneficial effects that:
1. the gas filtering device is arranged, so that pollutants in gas can be filtered, the mirror surface scattering level is reduced, zero drift of a condensation system is prevented, and the accuracy of a test result is improved.
PTFE microporous membrane is the best gas filtration membrane of filtering effect at present, makes gas cleaner, reduces mirror pollution, increases life.
3. The position of the gas filtering device, the position of the detection component and the design of the dewing system can save space, reduce the volume of the device and be convenient to carry.
4. The condensation system divides the heat conduction component into three parts, namely a refrigerating sheet, a heat conduction structure and a mirror surface, so that the volume of the condensation system can be reduced, the response speed is improved, and the refrigeration performance loss is avoided; the sealing ring can prevent water vapor from penetrating into the interior of the application dew condensation system through the dew condensation system, and damage is caused to internal circuits and components.
5. The thickness of condensate can be measured through regular reflection light and scattered light, and the reflection brightness of condensate at different positions is detected, so that the accuracy of the test result is improved.
Drawings
Fig. 1 is a cross-sectional view a of the present invention.
Fig. 2 is a cross-sectional view b of the present invention.
Fig. 3 is a cross-sectional view c of the present invention.
Fig. 4 is a structural diagram of the present invention.
Fig. 5 is an exploded view of the present invention.
Fig. 6 is an exploded view of the condensation system of the present invention.
Fig. 7 is a configuration diagram of the condensation system according to the present invention.
Reference numerals: detection upper cover 100, photoelectric detection device 101, detection cover 102, through hole 1021, detection cavity 1022, outer wall 1023, inner wall 1024, inner cavity 1025, mirror 103, sealing ring 104, heat conduction structure 105, thermometer 106, and refrigerating sheet 107.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
In order to facilitate understanding of the dew point detection device described in embodiment 1 of the present application, an application scenario of the dew point detection device is described first. The dew point detection device is applied to a condensation system which condenses gas and detects the humidity in the gas by detecting the dew point temperature. The dewing system can be applied to various working environments such as natural gas, metallurgy, health quarantine, poisonous and corrosive gas and the like, and has higher requirements on the performance of the dewing system from the application level because the dewing system is applied to various different working environments.
As shown in fig. 1 and 5, the dew point detection device capable of filtering gas in this embodiment includes a control system, a condensation system, and a photoelectric detection system, where the condensation system and the photoelectric detection system are respectively connected to the control system.
The photoelectric detection system comprises a photoelectric detection device 101 and a detection cover body 102, a detection cavity 1022 is formed in the detection cover body 102, a corresponding through hole 1021 is formed in the side wall of the detection cover body 102, an outer wall 1023 and an inner wall 1024 are arranged on the detection cover body 102, the through hole 1021 extends from the outer wall 1023 to the inner wall 1024, the detection cavity 1022 is formed by the corresponding through hole 1021, and a detection upper cover 100 is arranged on the detection cover body 102.
The dew condensation system includes a mirror surface 103, and is located at the bottom of the detection chamber 1022, and the photo detection device 101 is located on the detection upper cover 100 at the top of the detection chamber 1022.
Still include gas filter equipment, be equipped with inner chamber 1025 between inner wall 1024 and the outer wall 1023, gas filter equipment imbeds in inner chamber 1025, practice thrift the space, gas filter equipment is multilayer PTFE microporous membrane, have and filter including all dust particles including the bacterium, gas filter equipment corresponds through-hole 1021, gas filter equipment area is greater than the through-hole 1021 area, make through the gaseous complete filtration that can pass through the detection, detect gaseous earlier through gas filter equipment filtration reentrant detection chamber 1022, avoid impurity to adhere to on mirror 103 again the dewing in-process, influence dew point monitoring temperature.
The detection component 101 comprises a laser light source and a light receiving component, the laser light source emits excitation light, the light receiving component receives the excitation light laser reflected by the laser light source through the mirror surface 103, the response speed is high, the brightness attenuation is low, the reflection or scattering is clearer, the laser light source is small in size, the laser light source and the light receiving component are of an integrated structure, the volume of the detection component 101 can be reduced, the inner space of the detection cover body is saved, the gas flow space is increased, the laser energy consumption is low, the service life is long, the frequent replacement of the light source is avoided, the condensation thickness is detected, and the detection result is obtained.
As shown in fig. 3, the detection component 102 is provided with one laser light source, the receiving light component is provided with a plurality of laser light sources, the excitation light can form regular reflection light and scattered light, the light detection mode of the mirror surface can be a scattered light detection mode using the scattered light or a regular reflection light detection mode using the regular reflection light, the practicability of the device is improved, the condensation position can be detected through different angle reflection lights in the detection process, the detection result is compared, the detection accuracy is improved, the excitation light and the mirror surface form an angle of 60-90 degrees, the reflection range can be reduced, the volume of the detection cavity is reduced, and the detection device is smaller, more convenient and portable.
As shown in fig. 4, the detection cover 102 is provided with a corresponding through hole 1021, a detection chamber 1022 is provided inside, and the detection cover 102 is provided with a detection upper cover 100.
As shown in fig. 5 to 7, the condensation system includes a mirror surface 103, a seal ring 104, a heat conducting structure 105, a thermometer 106, and a cooling fin 107.
The specific working process of the dewing system is as follows: the refrigerating sheet 107 generates cold energy by a thermoelectric refrigerating principle, and the cold energy generated by the refrigerating sheet 107 is transferred to the upper surface of the mirror 103 through the heat conducting structure 105, so that water vapor in the working environment is condensed on the upper surface of the mirror 103 to form condensate. The condensation system then detects the temperature of the heat conducting structure 107 through the thermometer 106, thereby indirectly detecting the temperature of the mirror 103.
The cooling sheet 107 has a cooling surface and a heat dissipating surface, wherein the upper surface of the cooling sheet 107 is the cooling surface, and the lower surface thereof is the heat dissipating surface. Specifically, the cooling sheet 107 may have a three-layer structure, but is not limited to the three-layer structure. The refrigerating sheet 107 in this embodiment adopts a refrigerating sheet having a three-layer structure, and the cross-sectional area of the structure of the uppermost layer of the refrigerating sheet 107 is smaller than that of the structures of the other layers.
Wherein the heat conducting structure 105 is used for transferring the cold from the cooling surface of the cooling fin 107. Specifically, the heat conducting structure 105 has an upper surface and a lower surface, and the lower surface of the heat conducting structure 105 is connected to the cooling surface to transfer the cooling capacity of the cooling surface to the upper surface of the heat conducting structure. Specifically, to reduce the volume of the thermally conductive structure 105, the thermally conductive structure 105 is generally rectangular parallelepiped. Specifically, in order to reduce the volume of the condensation system, the heat conducting structure 105 is further improved, and the heat conducting structure 105 is recessed from the side, the upper surface and the lower surface to the inside to remove part of the structure to form an open area, and the open area is used for accommodating the thermometer 106. In detail, the open area is substantially rectangular parallelepiped. Specifically, the thermally conductive structure 105 may be made of a thermally conductive metal, preferably copper. The heat conducting structure 105 is recessed from the outer wall to the inside to form a groove, and the thermometer 106 is arranged in the groove and matched with the groove.
The mirror surface 103 is a condensation place of the condensation system. The lower surface of the mirror 103 is connected to the upper surface of the heat conducting structure 105, so as to transfer the cold energy of the upper surface of the heat conducting structure 105 to the upper surface of the mirror 103, and condense the water vapor in the working environment on the upper surface of the mirror 103. Specifically, to improve the heat conduction efficiency, the mirror 103 is a silicon wafer having a substantially square cross section. Specifically, in order to improve the anti-fouling capability of the mirror surface and make the mirror surface not easily scratched, a platinum layer or a gold layer or a rhodium layer and a hydrophobic material coating are disposed on the outer surface of the mirror surface 103, further, the platinum layer or the gold layer or the rhodium layer is disposed on the upper surface of the mirror surface 103, and the hydrophobic material coating is disposed on the upper surface of the platinum layer or the gold layer or the rhodium layer.
Wherein the thermometer 106 is used for measuring temperature. Specifically, the thermometer 106 is substantially rectangular parallelepiped, and the thermometer 106 is matched with the open area. Specifically, the thermometer is a platinum resistor, and in order to further increase the heat conduction area, a heat conduction silicone grease layer or a heat conduction glue layer is arranged on the outer surface of the platinum resistor, so that the thermometer 106 and the heat conduction structure are tightly adhered without gaps.
In order to avoid water vapor from penetrating into the interior through the condensation system, the sealing ring 104 is adopted for sealing in the embodiment of the application. Specifically, the sealing ring 104 is generally in a trapezoidal table shape, and the side surface of the trapezoidal table surrounds the heat conducting structure 105 to form a frame body, and wraps the periphery of the mirror 103, and in detail, the heat conducting structure 105, the mirror 103 and the thermometer 106 are all enclosed in the sealing ring 104. Specifically, a certain distance is provided between the upper surface and the lower surface of the sealing ring 104, and the lower end of the sealing ring 104 is enclosed in the upper end of the refrigerating plate 107. In detail, the lower end portion of the sealing ring 104 is wrapped around the periphery of the uppermost structure of the cooling sheet 107. Specifically, the seal ring 104 may be a rubber seal ring. The upper surface of the seal ring 104 is flush with the upper surface of the mirror 103.
Example 2
As shown in fig. 2, the dew point detection device capable of filtering gas in this embodiment includes a control system, a condensation system, and a photoelectric detection system, where the condensation system and the photoelectric detection system are respectively connected to the control system.
The control system controls the detection assembly and the condensation system to work, the gas filters pollutants in the gas through the gas filtering device, the impurities are prevented from polluting the mirror surface, the condensation system is prevented from zero drift, the mirror surface scattering level is reduced, the filtered gas reaches the detection cavity, the condensation system is cooled, the gas is enabled to form condensation on the condensation system, the detection cavity is internally condensed, the influence of air flow fluctuation on the detection result can be avoided, the detection result is inaccurate, the detection assembly monitors the dew point temperature, the dew point temperature is returned to the control system, the dew point temperature is obtained, and the accuracy of the test temperature is improved.
The condensation system comprises a mirror surface 103, a sealing ring 104, a heat conducting structure 105, a thermometer 106 and a refrigerating sheet 107.
The photoelectric detection system comprises a photoelectric detection device 101 and a detection cover body 102, a detection cavity 1022 is formed in the detection cover body 102, corresponding through holes 1021 are formed in the side wall of the detection cover body 102, the detection cavity 1022 is formed by the corresponding through holes 1021, and a detection upper cover 100 is arranged in the detection cover body 102.
The condensation system is located at the bottom of the detection chamber 1022, and the photo detection device 101 is located at the top of the detection chamber 1022, that is, on the detection upper cover 100.
The gas filter device is a PTFE microporous membrane and is used for atmosphere dust removal, gas purification and the like, the filtering efficiency is high and can reach 99.99 percent, and the gas filter device is near zero emission; the running resistance is low, and the filtering speed is high; long service life and repeated use, thereby reducing the running cost. Can be used for the flue gas filtration of various industrial melting furnaces such as chemical industry, iron and steel, metallurgy, carbon black, power generation, cement, garbage incineration and the like. After the detection gas is filtered by the PTFE microporous membrane, condensation is performed at a low temperature of a condensation system, and the dew point temperature is detected by the detection component, so that the accuracy of detecting the condensation is improved.
The gas filtering device covers the mirror surface 103, has a height between the mirror surface and the through hole, prevents water insoluble particles in the gas from adhering to the mirror surface, is used in a temperature range of-70 ℃ to 230 ℃ for completely filtering the detected gas between the through hole 1021 and the mirror surface 103, does not influence the condensation of the mirror surface 103, has high light transmittance, prevents chemical corrosion, can enable the filtered gas to form condensate on the mirror surface 103, and prevents dust or impurities from condensing on the surface of the mirror surface 103 and generating zero drift.
The detection upper cover 100 is provided with a clamping groove 1026, a detection component 101 is embedded in the clamping groove 1026, and the detection component 101 is connected with the control system. Not only can fix the detection component, avoid the damage in the use, still practice thrift the space in the detection chamber, can increase the gas flow space more.
The detection assembly 101 includes a laser light source that emits excitation light, and a receiving light assembly that receives the excitation light from the laser light source that is reflected by the mirror. The laser light source has the advantages of high response speed, low brightness attenuation, clearer reflection or scattering, small volume, reduced internal space, low laser energy consumption and long service life, avoids frequent replacement of the light source, and detects the thickness of condensate. There are two forms of laser light source and light receiving assembly, the first: the laser light source and the light receiving assembly are respectively provided with one, the laser light source and the light receiving assembly are of an integrated structure, the inner space of the detection cover body is saved, and the gas flowing space is increased. Second kind: the laser light source is provided with one, the light receiving components are provided with a plurality of light receiving components, and the excitation light and the mirror face form an angle of 60-90 degrees. The excitation light can form regular reflection light and scattered light, the light detection mode of the mirror surface can be a scattered light detection mode by utilizing the scattered light, the regular reflection light detection mode can also be utilized, the condensation position and the condensation thickness can be detected through different angle reflection lights in the detection process, the detection results are compared, the detection accuracy is improved, the angle between the excitation light and the mirror surface is improved, the reflection range can be reduced, the volume of a detection cavity is reduced, and the detection device is smaller, more convenient and portable.
The condensation system structure is the same as that of embodiment 1.
It should be understood that the foregoing examples of the present invention are merely illustrative of the present invention and are not intended to limit the present invention to the specific embodiments thereof. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a but dew point detection device of filtering gas, includes control system, dewfall system, photoelectric detection system connect respectively in control system, photoelectric detection system includes detection subassembly (101) and detects lid (102), be equipped with in detecting lid (102) and detect chamber (1022), dewfall system is located detect chamber (1022) bottom, detection subassembly (101) are located detect chamber (1022) top, detect lid (102) lateral wall and be equipped with corresponding through-hole (1021), its characterized in that still includes gas filtering device, gas filtering device with through-hole (1021) adaptation sets up, perhaps cover in dewfall system top; the dewing system comprises a dewing device, a dewing system and a dewing system,
the thermometer (106) is a four-wire platinum resistor, and the outer surface of the thermometer is provided with a heat-conducting silicone grease layer or a heat-conducting adhesive layer;
a refrigerating sheet (107) having an upper surface that is a refrigerating surface and a lower surface that is a heat dissipating surface;
the lower surface of the heat conduction structure (105) is connected with the refrigerating surface so as to transfer the cold energy of the refrigerating surface to the upper surface of the heat conduction structure (105), and the heat conduction structure (105) is also connected with the thermometer (106);
a mirror surface (103) the lower surface of which is connected with the upper surface of the heat conducting structure (105) so as to transfer the cold energy of the upper surface of the heat conducting structure (105) to the upper surface of the mirror surface (103) and enable the water vapor in the working environment to be condensed on the upper surface of the mirror surface (103);
sealing washer (104), sealing washer (104) are trapezoidal form generally, trapezoidal form is followed to the platform side heat conduction structure (105) is around forming a frame body, and wraps up the periphery of mirror surface (103), heat conduction structure (105), mirror surface (103), thermometer (106) all enclose and cover in sealing washer (104), have certain distance between the upper surface of sealing washer (104) and its lower surface, the lower tip of sealing washer (104) enclose and cover in the upper end of refrigeration piece (107).
2. The dew point detection apparatus for filterable gas according to claim 1, wherein the gas filtering means has an area larger than the area of the through hole (1021).
3. A dew point detection apparatus for filterable gas according to claim 2, wherein the gas filtering means is a multi-layered PTFE microporous membrane having a function of filtering all dust particles including bacteria.
4. A dew point detection device capable of filtering gas according to claim 3, wherein the detection cover body (102) is of a solid structure and is provided with an outer wall (1023) and an inner wall (1024), the through hole (1021) extends from the outer wall (1023) to the inner wall (1024), an inner cavity (1025) is arranged between the outer wall (1023) and the inner wall (1024), and the gas filtering device is embedded in the inner cavity (1025) and corresponds to the through hole (1021).
5. The dew point detection device capable of filtering gas according to claim 1, wherein the gas filtering device covers the mirror surface, and the height of the gas filtering device is located between the mirror surface (103) and the through hole (1021).
6. The device for detecting the dew point of the filterable gas according to claim 1, wherein a clamping groove (1026) is arranged at the top of the detecting cavity (1022), the detecting component (101) is embedded in the clamping groove (1026), and the detecting component (101) is connected with the control system.
7. The device according to claim 6, wherein the detecting means (101) comprises a laser light source emitting excitation light and a receiving light means receiving the excitation light reflected by the mirror (103) from the laser light source.
8. The device of claim 7, wherein the laser light source and the light receiving module are respectively provided with one, and the laser light source and the light receiving module are in an integrated structure.
9. The device according to claim 7, wherein one laser light source is provided, the plurality of light receiving units are provided, and the excitation light forms an angle of 60 ° to 90 ° with the mirror surface (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606608.0A CN112858387B (en) | 2020-12-30 | 2020-12-30 | Dew point detection device capable of filtering gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606608.0A CN112858387B (en) | 2020-12-30 | 2020-12-30 | Dew point detection device capable of filtering gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112858387A CN112858387A (en) | 2021-05-28 |
| CN112858387B true CN112858387B (en) | 2023-05-09 |
Family
ID=75998447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011606608.0A Active CN112858387B (en) | 2020-12-30 | 2020-12-30 | Dew point detection device capable of filtering gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112858387B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245695A (en) * | 2013-04-25 | 2013-08-14 | 南京信息工程大学 | High-precision dew point measuring device and detection method based on same |
| CN204286633U (en) * | 2014-12-01 | 2015-04-22 | 苏州赛宝校准技术服务有限公司 | A kind of long-range chilled-mirror type dew point instrument |
| CN111044567A (en) * | 2019-12-31 | 2020-04-21 | 中国人民解放军63837部队 | Chilled-mirror dew point hygrometer capable of quickly measuring extremely low dew point |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003044510A1 (en) * | 2001-11-20 | 2003-05-30 | Aalborg Universitet | Dynamic dew point analysis method and a device for determining the dew point temperature and relative humidity |
| CN209961716U (en) * | 2019-01-04 | 2020-01-17 | 中国人民解放军国防科技大学 | Integrated air dew point temperature measuring probe |
| CN210690460U (en) * | 2019-10-09 | 2020-06-05 | 广州西森自动化控制设备有限公司 | Dew point instrument |
-
2020
- 2020-12-30 CN CN202011606608.0A patent/CN112858387B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245695A (en) * | 2013-04-25 | 2013-08-14 | 南京信息工程大学 | High-precision dew point measuring device and detection method based on same |
| CN204286633U (en) * | 2014-12-01 | 2015-04-22 | 苏州赛宝校准技术服务有限公司 | A kind of long-range chilled-mirror type dew point instrument |
| CN111044567A (en) * | 2019-12-31 | 2020-04-21 | 中国人民解放军63837部队 | Chilled-mirror dew point hygrometer capable of quickly measuring extremely low dew point |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112858387A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5886249A (en) | Micromachined integrated opto-flow gas/liquid sensor | |
| EP1734385B1 (en) | Retro-reflector assembly and opacity monitor incorporating same | |
| CA2284486C (en) | Micromachined inferential opto-thermal gas sensor | |
| ATE301822T1 (en) | FLOW SENSOR FOR LIQUIDS | |
| US11703470B2 (en) | Sensor device for determining heat transfer parameters of a fluid | |
| US4782334A (en) | Vapor or gas detector and alarm system | |
| CN112268930B (en) | Dew point sensor | |
| US20090206264A1 (en) | Infra-red temperature sensor | |
| CN112858387B (en) | Dew point detection device capable of filtering gas | |
| US10260954B2 (en) | Infrared temperature measurement and stabilization thereof | |
| CN210410120U (en) | Pretreatment device for volatile organic compound Tvoc on-line monitoring system | |
| CN218646848U (en) | Infrared gas sensor | |
| US20020005068A1 (en) | Capacitive sensor condensation-type hygrometer | |
| CN112394086B (en) | Dewing system and dew point instrument thereof | |
| JPWO2014119690A1 (en) | Water vapor permeability measuring unit and water vapor permeability measuring method | |
| US7408158B2 (en) | Gas sensor apparatus | |
| WO2020008020A1 (en) | Gas sensor | |
| CN112858388B (en) | Chilled-mirror dew-point hygrometer probe | |
| CN221280967U (en) | Thermal conductance type gas sensor | |
| WO2022141175A1 (en) | Chilled mirror dew point hygrometer probe | |
| CN212432974U (en) | Nitrogen dioxide measuring device | |
| CN218956403U (en) | Eight-channel NDIR optical platform | |
| CN210487151U (en) | Differential pressure measuring device | |
| CN112730517A (en) | Dew point refrigerating system and dew point detector thereof | |
| CN115656087A (en) | Eight-channel NDIR optical platform with concentration compensation method among detection gases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 510336 building 3, No.17 Yunjun Road, Huangpu District, Guangzhou City, Guangdong Province Applicant after: Guangzhou Aosong Electronics Co.,Ltd. Address before: 510336 building 3, No.17 Yunjun Road, Huangpu District, Guangzhou City, Guangdong Province Applicant before: AOSONG (GUANGZHOU) ELECTRONICS Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |