CN215599002U - Sulfur trioxide gas on-line measuring equipment - Google Patents
Sulfur trioxide gas on-line measuring equipment Download PDFInfo
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- CN215599002U CN215599002U CN202121638497.1U CN202121638497U CN215599002U CN 215599002 U CN215599002 U CN 215599002U CN 202121638497 U CN202121638497 U CN 202121638497U CN 215599002 U CN215599002 U CN 215599002U
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- China
- Prior art keywords
- sulfur trioxide
- optical measuring
- trioxide gas
- optical
- infrared laser
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- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 150000008064 anhydrides Chemical group 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 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
- 238000005504 petroleum refining Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to sulfur trioxide gas online measuring equipment which comprises an optical measuring cell, wherein a heating plate is arranged outside the optical measuring cell, one end of the optical measuring cell is connected with a vacuum pump, the other end of the optical measuring cell is connected with a sampling heat tracing pipe, a mid-infrared laser and a photoelectric detector are respectively arranged on two sides of the optical measuring cell, and the mid-infrared laser and the photoelectric detector are both connected with a data generation and acquisition system. The utility model can realize the online measurement of the concentration of sulfur trioxide gas and provide data support for ensuring the economical efficiency, safety and environmental protection of the operation of devices of production enterprises such as power plants, sulfuric acid plants and the like.
Description
Technical Field
The utility model belongs to the field of industrial production such as electric power, chemical industry and the like, and particularly relates to sulfur trioxide gas online measuring equipment.
Background
The sulfur trioxide is anhydride of sulfuric acid, is a characteristic factor for representing gaseous sulfuric acid pollution, has high toxicity and strong corrosivity, and has far more harm than sulfur dioxide. The sulfur trioxide produced in the industrial production process mainly comes from the sulfur acid-making industry, the pyrite acid-making industry, coal-fired power plants, the petroleum refining industry and other industries which take coal as raw material or fuel.
The harm of sulfur trioxide to the ecological environment and industrial production is mainly reflected in the following aspects: 1) the sulfur trioxide is a main reason for generating blue and yellow smoke plume in the exhaust smoke, is one of main pollutants for forming acid rain, and is one of important sources of PM2.5 in the atmosphere; 2) the sulfur trioxide increases the acid dew point of the flue gas, so that sulfuric acid mist formed by low-temperature flue gas corrodes the metal heating surface of the boiler and the air preheater; 3) acid mist formed by sulfur trioxide is easy to react with fly ash to form scale, so that a flue is blocked; 4) the sulfur trioxide can also react with ammonia in an SCR (selective catalytic reduction) denitration system to form ammonium sulfate, so that the surface pores of the catalyst are blocked, and the service life of the SCR system is shortened. Therefore, the measurement of the sulfur trioxide concentration has very important significance on the economical efficiency, the safety and the environmental protection performance of the device operation of production enterprises such as power plants, sulfuric acid plants and the like. At present, most of the existing measuring equipment is an off-line chemical method, the operation is complex, the measuring response time is long, and the measuring accuracy is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing sulfur trioxide gas online measuring equipment aiming at the defects of the background technology, which can realize online measurement of the concentration of sulfur trioxide gas and provide data support for ensuring the economical efficiency, safety and environmental protection of the operation of devices of production enterprises such as power plants, sulfuric acid plants and the like.
The utility model adopts the following technical scheme for solving the technical problems:
the utility model provides a sulfur trioxide gas on-line measuring equipment, equipment includes the optical measurement pond, and the optical measurement pond is provided with the hot plate outward, optical measurement pond one end is connected with the vacuum pump, and the other end is connected with the sampling heat tracing pipe, the both sides in optical measurement pond are provided with mid infrared laser instrument and photoelectric detector respectively, mid infrared laser instrument and photoelectric detector are all connecting data generation collection system.
Furthermore, the optical measuring cell is of a straight-through structure and is arranged in the heating plate.
Furthermore, calcium chloride window sheets are arranged between the optical measuring cell and the mid-infrared laser and between the optical measuring cell and the photoelectric detector.
Furthermore, the working center wavelength of the mid-infrared laser is 7323nm, and the working wavelength range of the photoelectric detector is 3000-9000 nm.
Further, the optical measurement cell carries out negative pressure sampling through vacuum pump and companion's heat sampling pipe, and sampling gas flow passes through needle valve control. .
Furthermore, the optical measuring cell is made of 316L stainless steel.
Further, the working temperature of the heating plate of the optical measurement cell and the working temperature of the heat tracing sampling tube are not lower than 220 ℃.
Compared with the prior art, the utility model adopting the technical scheme has the following technical effects:
the method samples the flue gas through negative pressure, avoids sample gas from condensing in the sampling and measuring process through the heating plate and the heat tracing, measures the sulfur trioxide gas by using an intermediate infrared absorption spectrum method, determines the gas concentration through the strength of an absorption signal, and realizes the online measurement of the sulfur trioxide gas.
Drawings
Fig. 1 is a schematic overall structure diagram of the present embodiment.
In the figure, 1 a data generation and acquisition system, 2 a mid-infrared laser, 3 an optical measurement cell, 4 a heating plate, 5 a photoelectric detector, 6 a vacuum pump and 7 a sampling heat tracing pipe.
Detailed Description
The technical scheme of the utility model is further explained in detail by combining the attached drawings:
in the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
The utility model provides a sulfur trioxide gas on-line measuring equipment, as shown in figure 1, equipment includes the optical measurement pond, and the optical measurement pond is provided with the hot plate outward, optical measurement pond one end is connected with the vacuum pump, and the other end is connected with the sampling companion heat pipe, the both sides in optical measurement pond are provided with mid infrared laser and photoelectric detector respectively, mid infrared laser and photoelectric detector are all connecting data generation collection system.
And calcium chloride window sheets are arranged between the optical measuring cell and the mid-infrared laser and between the optical measuring cell and the photoelectric detector. The working center wavelength of the mid-infrared laser is 7323nm, and the working wavelength range of the photoelectric detector is 3000-9000 nm.
The optical measurement cell carries out negative pressure sampling through vacuum pump and heat tracing sampling pipe, and sampling gas flow passes through needle valve control. The optical measuring cell is of a straight-through structure and is arranged in the heating plate. The optical measurement cell is made of 316L stainless steel materials and is suitable for corrosion measurement occasions. The working temperature of the heating plate of the optical measurement cell and the working temperature of the heat tracing sampling tube are not lower than 220 ℃.
Specifically, sulfur trioxide gas is generated by a sulfur trioxide production device. The temperature of the heating plate and the sampling heat tracing pipe is set and kept stable. And connecting the sampling heat tracing pipe with the gas circuit of the sulfur trioxide preparation device, starting a vacuum pump for sampling, and introducing sulfur trioxide gas into the high-temperature low-pressure optical absorption cell. The detection light emitted by the intermediate infrared laser is converted into an electric signal by the photoelectric detector after being absorbed by gas, the electric signal is analyzed and processed on line through the data generation and acquisition device, and the calculation mode specifically adopts an intermediate infrared absorption spectrum method based on the beer-Lambert law.
The online measuring equipment for the sulfur trioxide gas can nondestructively collect the sulfur trioxide in the flue gas, prevent the sulfur trioxide gas from condensing in a high-temperature negative-pressure environment, and measure the concentration by a mid-infrared absorption spectrum method.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. The utility model provides a sulfur trioxide gas on-line measuring equipment which characterized in that: the equipment comprises an optical measuring tank, a heating plate is arranged outside the optical measuring tank, one end of the optical measuring tank is connected with a vacuum pump, the other end of the optical measuring tank is connected with a sampling heat tracing pipe, a middle infrared laser and a photoelectric detector are respectively arranged on two sides of the optical measuring tank, and the middle infrared laser and the photoelectric detector are both connected with a data generation and acquisition system.
2. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: the optical measuring cell is of a straight-through structure and is arranged in the heating plate.
3. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: and calcium chloride window sheets are arranged between the optical measuring cell and the mid-infrared laser and between the optical measuring cell and the photoelectric detector.
4. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: the working center wavelength of the mid-infrared laser is 7323nm, and the working wavelength range of the photoelectric detector is 3000-9000 nm.
5. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: the optical measurement cell carries out negative pressure sampling through vacuum pump and heat tracing sampling pipe, and sampling gas flow passes through needle valve control.
6. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: the optical measuring cell is made of 316L stainless steel material.
7. The on-line sulfur trioxide gas measuring device according to claim 1, characterized in that: the working temperature of the heating plate of the optical measurement cell and the working temperature of the heat tracing sampling tube are not lower than 220 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121638497.1U CN215599002U (en) | 2021-07-19 | 2021-07-19 | Sulfur trioxide gas on-line measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121638497.1U CN215599002U (en) | 2021-07-19 | 2021-07-19 | Sulfur trioxide gas on-line measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215599002U true CN215599002U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121638497.1U Active CN215599002U (en) | 2021-07-19 | 2021-07-19 | Sulfur trioxide gas on-line measuring equipment |
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| Country | Link |
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| CN (1) | CN215599002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460038A (en) * | 2021-12-31 | 2022-05-10 | 南京星空低碳科技中心(有限合伙) | Device and method for online monitoring of sulfur trioxide concentration |
-
2021
- 2021-07-19 CN CN202121638497.1U patent/CN215599002U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460038A (en) * | 2021-12-31 | 2022-05-10 | 南京星空低碳科技中心(有限合伙) | Device and method for online monitoring of sulfur trioxide concentration |
| CN114460038B (en) * | 2021-12-31 | 2023-09-01 | 南京星空低碳科技中心(有限合伙) | Device and method for on-line monitoring concentration of sulfur trioxide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240410 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: SINOPEC Group Country or region after: China Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: 211300 No. 3, ancient Tan Road, Gaochun District Economic Development Zone, Nanjing, Jiangsu Patentee before: Nanjing Star Energy Technology Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |