CN112984380A - Nitric oxide gas supply device for laboratory and corresponding supply method - Google Patents
Nitric oxide gas supply device for laboratory and corresponding supply method Download PDFInfo
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- CN112984380A CN112984380A CN202110298452.2A CN202110298452A CN112984380A CN 112984380 A CN112984380 A CN 112984380A CN 202110298452 A CN202110298452 A CN 202110298452A CN 112984380 A CN112984380 A CN 112984380A
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- Prior art keywords
- nitric oxide
- gas
- pipeline
- output port
- generating device
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 238000000034 method Methods 0.000 title claims description 10
- 239000007789 gas Substances 0.000 claims abstract description 61
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 15
- 238000007254 oxidation reaction Methods 0.000 claims description 14
- 230000003197 catalytic effect Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 11
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a nitric oxide gas supply device for a laboratory, which directly generates nitric oxide gas on site and supplies the nitric oxide gas to a laboratory for use, so that the cost is reduced, the dangerous hidden dangers of purification, compression and transportation are reduced, the loss is reduced, and the cost is saved by more than 50%. The device comprises a nitric oxide generating device, a high-purity nitrogen storage tank, an injection mixer, an NO flue gas analyzer and a flowmeter, wherein a first injection gas inlet of the injection mixer is connected to an output port of the high-purity nitrogen storage tank through a first pipeline, a flow regulating valve is installed on the first pipeline, an output port of the nitric oxide generating device is connected with a medium output port of the injection mixer, a rear output port of the injection mixer is externally connected to an input port of the flowmeter through a second pipeline, and an output port of the flowmeter is externally connected to an input end of a rear catalyst detection table.
Description
Technical Field
The invention relates to the technical field of thermal power NOx removal, in particular to a nitric oxide gas supply device for a laboratory, and further provides a nitric oxide gas supply method for the laboratory.
Background
SCR catalysts are the main carriers for removing pollutants NOx in thermal power and related industries. The quality of the performance of the composite material is also an important issue related to environmental protection. The performance index of the SCR catalyst contains process characteristics and physicochemical characteristics, and in order to detect and judge the performance index of the SCR catalyst, a plurality of domestic laboratories also build the SCR catalyst detection bench according to the standard.
A flue gas generation system in an SCR catalyst detection rack simulates the flue gas environment of a catalyst in a denitration system. The main smoke components are NO (nitric oxide), SO2 (sulfur dioxide), NH3 (ammonia gas), H2O and the like. The laboratory flue gas generation system generally has a combustion method and a gas distribution method for flue gas simulation, and the gas distribution method can be flexibly adjusted according to working conditions and widely used by various laboratories due to accurate simulation.
The gases such as nitric oxide, sulfur dioxide, ammonia gas and the like in the gas distribution method all adopt outsourced high-purity gases. The nitric oxide gas has large consumption, high price and certain potential safety hazard in storage and transportation, and becomes an important factor influencing the development of laboratories.
Disclosure of Invention
In order to solve the problems, the invention provides a nitric oxide gas supply device for a laboratory, which directly generates nitric oxide gas on site and supplies the nitric oxide gas to a laboratory for use, so that the cost is reduced, the dangerous hidden dangers of purification, compression and transportation are reduced, the loss is reduced, and the cost is saved by more than 50%.
The utility model provides a laboratory is with feeding device of nitric oxide gas which characterized in that: the device comprises a nitric oxide generating device, a high-purity nitrogen storage tank, an injection mixer, an NO flue gas analyzer and a flowmeter, wherein a first injection gas inlet of the injection mixer is connected to an output port of the high-purity nitrogen storage tank through a first pipeline, a flow regulating valve is installed on the first pipeline, an output port of the nitric oxide generating device is connected with a medium output port of the injection mixer, a rear output port of the injection mixer is externally connected to an input port of the flowmeter through a second pipeline, and an output port of the flowmeter is externally connected to an input end of a rear catalyst detection table.
It is further characterized in that:
an NO flue gas analyzer is arranged beside the second pipeline and used for analyzing the concentration of NO in nitric oxide mixed gas on line;
the nitric oxide generating device specifically comprises a catalytic oxidation reaction tower, an absorption tower and a buffer tank, compressed air is introduced into a first gas inlet of the catalytic oxidation reaction tower through a third pipeline, an output end of an ammonia gas storage tank is introduced into a second gas inlet of the catalytic oxidation reaction tower through a fourth pipeline, a mixed medium outlet of the catalytic oxidation reaction tower is communicated to a medium inlet of the absorption tower, spraying equipment is introduced into the top of the absorption tower, a medium outlet of the absorption tower is communicated to a medium inlet of the buffer tank, and a medium outlet of the buffer tank is an output port of the nitric oxide generating device and outputs nitric oxide;
independent mass flow valves are respectively arranged on the third pipeline and the fourth pipeline, so that the purity of the generated NO is ensured;
a medium inlet is formed in one side of the lower part of the absorption tower, a medium outlet is formed in the other side of the upper part of the absorption tower, and a discharge valve is further arranged at the bottom of the absorption tower and used for discharging impurities;
the buffer tank is used for storing NO and buffering NO gas, a medium inlet is formed in one side of the lower portion of the buffer tank, and a medium outlet is formed in the other side of the upper portion of the buffer tank.
A method for supplying nitric oxide gas for a laboratory, comprising: nitric oxide gas that nitric oxide generating device produced, utilize high-purity nitrogen gas to mix through the injection blender and be the nitric oxide gas mixture, later measure nitric oxide gas mixture concentration through NO flue gas analyzer, measure nitric oxide gas mixture flow according to the flowmeter, can convert out the catalyst and detect the total amount of the nitric oxide that adds in the platform, then flow through adjustment high-purity nitrogen gas, and then adjustment nitric oxide brings the volume into, according to the nitric oxide demand, through the supply quantity of nitric oxide generating device adjustment compressed air and ammonia, thereby reach the supply and demand balance.
After adopting above-mentioned technical scheme, it is at the scene directly generate nitric oxide gas, later utilize high-purity nitrogen gas to pass through the mixing of jet mixer and become the nitric oxide gas mixture, then carry out reasonable flow distribution with the nitric oxide mixer through NO flue gas analyzer, flowmeter, the nitric oxide gas supply laboratory that will satisfy the demand uses, and its cost is reduced to reduce the dangerous hidden danger of purification, compression, transportation, and reduced the loss, saved the cost more than 50%.
Drawings
FIG. 1 is a block diagram schematically illustrating the structure of the apparatus of the present invention;
FIG. 2 is a block diagram schematically illustrating the structure of the nitric oxide generating apparatus according to the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the device comprises a nitric oxide generating device 1, a high-purity nitrogen storage tank 2, an injection mixer 3, an NO flue gas analyzer 4, a flowmeter 5, a first pipeline 6, a flow regulating valve 7, a second pipeline 8, a catalyst detection table 9, a catalytic oxidation reaction tower 10, an absorption tower 11, a buffer tank 12, compressed air 13, a third pipeline 14, an ammonia storage tank 15, a fourth pipeline 16, spraying equipment 17, a mass flow valve 18 and a discharge valve 19.
Detailed Description
A nitric oxide gas supply device for a laboratory is shown in figures 1 and 2: it includes nitric oxide generating device 1, high-purity nitrogen gas storage tank 2, jet mixer 3, NO flue gas analyzer 4, flowmeter 5, jet mixer 3's first jet gas inlet is connected to high-purity nitrogen gas storage tank 2's delivery outlet through first pipeline 6, flow control valve 7 is installed to first pipeline, nitric oxide generating device 1's output port connector jet mixer 3's medium delivery outlet, jet mixer 3's rear portion output passes through the external input port to flowmeter 5 of second pipeline 8, flowmeter 5's delivery outlet connects to the input of the catalyst converter test table 9 at rear portion outward.
The jet mixer 3 is not only capable of bringing nitric oxide into the main system, but also of achieving rapid mixing. The reason for selecting high purity nitrogen is that the high purity nitrogen is the background gas of the catalyst detection table, and can ensure that no oxidation reaction occurs in the nitrogen monoxide.
An NO flue gas analyzer 4 is arranged beside the second pipeline 8, and the NO flue gas analyzer 4 is used for analyzing the concentration of NO in nitric oxide mixed gas on line;
the nitric oxide generating device 1 specifically comprises a catalytic oxidation reaction tower 10, an absorption tower 11 and a buffer tank 12, compressed air 13 is introduced into a first gas inlet of the catalytic oxidation reaction tower 10 through a third pipeline 14, an output end of an ammonia gas storage tank 15 is introduced into a second gas inlet of the catalytic oxidation reaction tower 10 through a fourth pipeline 16, a mixed medium outlet of the catalytic oxidation reaction tower 10 is communicated to a medium inlet of the absorption tower 11, a spraying device 17 is introduced into the top in the absorption tower 11, a medium outlet of the absorption tower 11 is communicated to a medium inlet of the buffer tank 12, and a medium outlet of the buffer tank 12 is an output port of the nitric oxide generating device 1 and outputs nitric oxide;
independent mass flow valves 18 are respectively arranged on the third pipeline 14 and the fourth pipeline 16, so that the purity of the generated NO is ensured;
a medium inlet is formed in one side of the lower part of the absorption tower 11, a medium outlet is formed in the other side of the upper part of the absorption tower 11, and a discharge valve 19 is further arranged at the bottom of the absorption tower 11 and used for discharging impurities;
the buffer tank 12 is used for storing NO and buffering NO gas, a medium inlet is arranged on one side of the lower portion of the buffer tank 12, and a medium outlet is arranged on the other side of the upper portion of the buffer tank 12.
Method for supplying nitric oxide gas for laboratory: nitric oxide gas that nitric oxide generating device produced, utilize high-purity nitrogen gas to mix through the injection blender and be the nitric oxide gas mixture, later measure nitric oxide gas mixture concentration through NO flue gas analyzer, measure nitric oxide gas mixture flow according to the flowmeter, can convert out the catalyst and detect the total amount of the nitric oxide that adds in the platform, then flow through adjustment high-purity nitrogen gas, and then adjustment nitric oxide brings the volume into, according to the nitric oxide demand, through the supply quantity of nitric oxide generating device adjustment compressed air and ammonia, thereby reach the supply and demand balance.
The working principle is as follows: it directly generates nitric oxide gas at the scene, later utilizes high-purity nitrogen gas to pass through the mixing of injection blender and becomes nitric oxide gas mixture, then carries out reasonable flow distribution with the nitric oxide blender through NO flue gas analyzer, flowmeter, and the nitric oxide gas that will satisfy the demand supplies the laboratory to use, and its cost is reduced to reduce the dangerous hidden danger of purification, compression, transportation, and reduced the loss, saved the cost more than 50%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a laboratory is with feeding device of nitric oxide gas which characterized in that: the device comprises a nitric oxide generating device, a high-purity nitrogen storage tank, an injection mixer, an NO flue gas analyzer and a flowmeter, wherein a first injection gas inlet of the injection mixer is connected to an output port of the high-purity nitrogen storage tank through a first pipeline, a flow regulating valve is installed on the first pipeline, an output port of the nitric oxide generating device is connected with a medium output port of the injection mixer, a rear output port of the injection mixer is externally connected to an input port of the flowmeter through a second pipeline, and an output port of the flowmeter is externally connected to an input end of a rear catalyst detection table.
2. The nitric oxide gas supply apparatus for laboratories according to claim 1, wherein: and an NO flue gas analyzer is arranged beside the second pipeline and used for analyzing the concentration of NO in nitric oxide mixed gas on line.
3. The nitric oxide gas supply apparatus for laboratories according to claim 2, wherein: the nitric oxide generating device specifically comprises a catalytic oxidation reaction tower, an absorption tower and a buffer tank, compressed air is introduced into a first gas inlet of the catalytic oxidation reaction tower through a third pipeline, an output end of an ammonia gas storage tank is introduced into a second gas inlet of the catalytic oxidation reaction tower through a fourth pipeline, a mixed medium outlet of the catalytic oxidation reaction tower is communicated to a medium inlet of the absorption tower, spraying equipment is introduced into the top of the absorption tower, a medium outlet of the absorption tower is communicated to a medium inlet of the buffer tank, and a medium outlet of the buffer tank is an output port of the nitric oxide generating device and outputs nitric oxide.
4. The nitric oxide gas supply apparatus for laboratories according to claim 3, wherein: and independent mass flow valves are respectively arranged on the third pipeline and the fourth pipeline.
5. The nitric oxide gas supply apparatus for laboratories according to claim 1, wherein: a medium inlet is formed in one side of the lower portion of the absorption tower, a medium outlet is formed in the other side of the upper portion of the absorption tower, and a discharge valve is further arranged at the bottom of the absorption tower.
6. The nitric oxide gas supply apparatus for laboratories according to claim 1, wherein: the buffer tank is used for storing NO and buffering NO gas, a medium inlet is formed in one side of the lower portion of the buffer tank, and a medium outlet is formed in the other side of the upper portion of the buffer tank.
7. A method for supplying nitric oxide gas for a laboratory, comprising: nitric oxide gas that nitric oxide generating device produced, utilize high-purity nitrogen gas to mix through the injection blender and be the nitric oxide gas mixture, later measure nitric oxide gas mixture concentration through NO flue gas analyzer, measure nitric oxide gas mixture flow according to the flowmeter, can convert out the catalyst and detect the total amount of the nitric oxide that adds in the platform, then flow through adjustment high-purity nitrogen gas, and then adjustment nitric oxide brings the volume into, according to the nitric oxide demand, through the supply quantity of nitric oxide generating device adjustment compressed air and ammonia, thereby reach the supply and demand balance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110298452.2A CN112984380A (en) | 2021-03-19 | 2021-03-19 | Nitric oxide gas supply device for laboratory and corresponding supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110298452.2A CN112984380A (en) | 2021-03-19 | 2021-03-19 | Nitric oxide gas supply device for laboratory and corresponding supply method |
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| CN112984380A true CN112984380A (en) | 2021-06-18 |
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| CN202110298452.2A Pending CN112984380A (en) | 2021-03-19 | 2021-03-19 | Nitric oxide gas supply device for laboratory and corresponding supply method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284656A (en) * | 2008-05-20 | 2008-10-15 | 西安理工大学 | Nitric oxide gas generating unit and preparing process |
| CN104965050A (en) * | 2015-06-25 | 2015-10-07 | 苏州西热节能环保技术有限公司 | Full-size flue gas denitrification catalytic performance detecting device and method |
| TWM515411U (en) * | 2015-10-01 | 2016-01-11 | Air Force Inst Of Technology | Nitric oxide catalyst system with automatic deployment |
| KR20190106001A (en) * | 2018-03-07 | 2019-09-18 | 두산중공업 주식회사 | Apparatus for simultaneous removing nitrogen oxide and sulfur oxides of flue gas |
| CN110935302A (en) * | 2019-11-27 | 2020-03-31 | 西安热工研究院有限公司 | Dynamically adjustable flue ozone oxidation NOx control system and method |
| CN216046889U (en) * | 2021-03-19 | 2022-03-15 | 苏州西热节能环保技术有限公司 | Laboratory is with gaseous feeding device of nitric oxide |
-
2021
- 2021-03-19 CN CN202110298452.2A patent/CN112984380A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284656A (en) * | 2008-05-20 | 2008-10-15 | 西安理工大学 | Nitric oxide gas generating unit and preparing process |
| CN104965050A (en) * | 2015-06-25 | 2015-10-07 | 苏州西热节能环保技术有限公司 | Full-size flue gas denitrification catalytic performance detecting device and method |
| TWM515411U (en) * | 2015-10-01 | 2016-01-11 | Air Force Inst Of Technology | Nitric oxide catalyst system with automatic deployment |
| KR20190106001A (en) * | 2018-03-07 | 2019-09-18 | 두산중공업 주식회사 | Apparatus for simultaneous removing nitrogen oxide and sulfur oxides of flue gas |
| CN110935302A (en) * | 2019-11-27 | 2020-03-31 | 西安热工研究院有限公司 | Dynamically adjustable flue ozone oxidation NOx control system and method |
| CN216046889U (en) * | 2021-03-19 | 2022-03-15 | 苏州西热节能环保技术有限公司 | Laboratory is with gaseous feeding device of nitric oxide |
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