CN110980661A - Nitrogen and oxygen generating device and thermal power plant catalyst reaction performance detection device - Google Patents
Nitrogen and oxygen generating device and thermal power plant catalyst reaction performance detection device Download PDFInfo
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- CN110980661A CN110980661A CN201911357009.7A CN201911357009A CN110980661A CN 110980661 A CN110980661 A CN 110980661A CN 201911357009 A CN201911357009 A CN 201911357009A CN 110980661 A CN110980661 A CN 110980661A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 112
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 71
- 239000001301 oxygen Substances 0.000 title claims abstract description 71
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 54
- 239000003054 catalyst Substances 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 title description 3
- 238000001179 sorption measurement Methods 0.000 claims abstract description 83
- 239000003546 flue gas Substances 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 239000002808 molecular sieve Substances 0.000 claims abstract description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 45
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 12
- 238000006555 catalytic reaction Methods 0.000 claims description 11
- 229910052753 mercury Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/045—Physical processing only by adsorption in solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to the technical field of SCR flue gas denitration, in particular to a nitrogen and oxygen generating device and a device for detecting the reaction performance of a catalyst of a thermal power plant. The invention discloses a nitrogen and oxygen generating device, wherein when a flow regulating valve is closed, molecular sieves in an adsorption tower separate oxygen to obtain pure nitrogen; and opening the flow regulating valve, and regulating the concentration of the nitrogen and the oxygen by regulating the opening of the flow regulating valve to obtain the required concentration of the nitrogen and the oxygen. The device can directly replace the nitrogen and oxygen of purchase, has reduced the experimental cost of catalyst activity test, has reduced the mixed step of pure nitrogen gas and pure oxygen moreover, and convenient operation is swift.
Description
Technical Field
The invention relates to the technical field of SCR flue gas denitration, in particular to a nitrogen and oxygen generating device and a device for detecting the reaction performance of a catalyst of a thermal power plant.
Background
At present, an important technical means for realizing the ultralow emission of NOx in a thermal power plant is to adopt a Selective Catalytic Reduction (SCR) denitration technology. SCR flue gas denitration catalyst in catalysis of NH3Reduction of NOXWhen this happens, the catalyst may also cause a series of side reactions to occur, including the generation of SO2Oxidation to SO3，Hg0Oxidation to Hg2+. The catalyst is the core of the SCR flue gas denitration technology, and the performance of the catalyst is a main factor influencing the SCR denitration efficiency. Therefore, before the denitration catalyst is applied, the reaction performance of the SCR catalyst needs to be accurately tested, including the denitration efficiency, the mercury simple substance oxidation, the sulfur dioxide oxidation and the like of the catalyst. In the performance test experiment, a nitrogen cylinder, an oxygen cylinder, a sulfur dioxide cylinder and the like are purchased to provide pure nitrogen, pure oxygen, pure sulfur dioxide and other gases to simulate smoke. When the catalyst reaction performance test is carried out, the test cost is high by purchasing nitrogen and oxygen because the consumption of flue gas such as nitrogen, oxygen and the like is high.
Disclosure of Invention
The invention provides a nitrogen and oxygen generating device and a thermal power plant catalyst reaction performance detection device, and solves the problem that nitrogen and oxygen are needed to be purchased in an SCR denitration catalyst reaction performance test, so that the test cost is high.
The specific technical scheme is as follows:
the invention provides a nitrogen and oxygen generating device, comprising: the device comprises an air collecting unit, an adsorption tower, an oxygen control unit and an air storage tank;
a carbon molecular sieve is arranged in the adsorption tower;
the air collection unit is communicated with the air inlet end of the adsorption tower through a first one-way valve and a first switch valve which are sequentially arranged;
the gas outlet end of the adsorption tower is communicated with the gas storage tank through a second switch valve, and the oxygen control unit is arranged between the gas outlet end of the adsorption tower and the second switch valve;
the oxygen control unit includes: an exhaust pipe and a flow regulating valve;
the air inlet end of the exhaust pipe is communicated with the air outlet end of the adsorption tower through the flow regulating valve, and the air outlet end of the exhaust pipe is communicated with the atmosphere.
Preferably, the adsorption column includes: the first adsorption tower and the second adsorption tower are arranged in parallel.
Preferably, the air inlet end of the first adsorption tower is communicated with the air inlet end of the second adsorption tower through a third switch valve and a fourth switch valve which are arranged in parallel;
the third switch valve comprises a switch valve A and a switch valve B which are arranged in series, and the fourth switch valve comprises a switch valve C and a switch valve D which are arranged in series;
the air outlet end of the first switch valve is communicated with the switch valve C and the switch valve D;
an exhaust port is arranged between the switch valve A and the switch valve B.
Preferably, the gas outlet end of the first adsorption tower is communicated with the gas outlet end of the second adsorption tower through a fifth switch valve and a sixth switch valve which are arranged in parallel;
the fifth switch valve comprises a switch valve E and a switch valve F which are arranged in series, and the sixth switch valve comprises a switch valve G and a switch valve H which are arranged in series;
and the air inlet end of the exhaust pipe and the air inlet end of the second switch valve are communicated with the switch valve E and the switch valve F.
Preferably, the air collection unit includes: the air compressor, the first filter, the cold dryer, the second filter, the oil remover and the air buffer tank are sequentially communicated;
the air buffer tank is arranged at the air inlet end of the first one-way valve.
The invention also provides a method for generating nitrogen and oxygen by using the nitrogen and oxygen generating device, which is characterized by comprising the following steps of:
the air is collected to the air collecting unit, opens first check valve and first ooff valve in proper order and makes the air admission adsorption tower, opens the second ooff valve simultaneously to adjust flow control valve control the air admission the flow of adsorption tower makes nitrogen gas and the oxygen that the adsorption tower generated get into the gas holder from giving vent to anger the end.
The invention also provides a device for detecting the reaction performance of the catalyst in the thermal power plant, which is characterized by comprising a flue gas generation unit, a flow measurement control unit, a temperature control unit, a multi-stage flue gas mixing unit and a catalytic reaction test unit which are sequentially communicated;
the smoke generating unit comprises: a nitrogen and oxygen generating apparatus according to any preceding claim.
Preferably, the smoke generating unit further comprises: mercury generator, NO gas cylinder and SO2Gas cylinder, NH3A gas cylinder and a water vapor generator.
Preferably, the multi-stage flue gas mixing unit comprises at least two mixing units connected in sequence;
the mixing unit includes: the guide plate is fixed between the first fixing frame and the second fixing frame;
the guide plates are wavy, and the guide plates are arranged in a staggered mode side by side, so that wave crests of the adjacent guide plates are connected with wave troughs.
Preferably, the mercury generating device comprises a water bath device and a U-shaped pipe arranged in the water bath device, and the U-shaped pipe is internally provided with the mercury reagent.
According to the technical scheme, the invention has the following advantages:
the invention provides a nitrogen and oxygen generating device, wherein when a flow regulating valve is closed, molecular sieves in an adsorption tower separate oxygen to obtain pure nitrogen. And opening the flow regulating valve, and regulating the concentration of the nitrogen and the oxygen by regulating the opening of the flow regulating valve to obtain the required concentration of the nitrogen and the oxygen. The device can directly replace the nitrogen and oxygen of purchase, has reduced the experimental cost of catalyst activity test, has reduced the mixed step of pure nitrogen gas and pure oxygen moreover, and convenient operation is swift.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a nitrogen and oxygen generation apparatus according to an embodiment of the present invention;
fig. 2 is a front view of a multi-stage flue gas mixing unit provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic diagram of an apparatus for detecting the reaction performance of a catalyst in a thermal power plant according to an embodiment of the present invention;
wherein the illustration is as follows:
1. an air compressor; 2. a first filter; 3. a cold dryer; 4. a filter A; 5. a filter B; 6. an oil remover; 7. an air buffer tank; 8. a first adsorption tower; 9. a second adsorption column; 10. a first check valve; 11. a second one-way valve; 13. a first on-off valve; 14. a second on-off valve; 15. an on-off valve A; 16. an on-off valve B; 17. an on-off valve C; 18. an on-off valve D; 19. an on-off valve E; 20. an on-off valve F; 21. an on-off valve G; 22. an on-off valve H; 23. a gas storage tank; 24. an oxygen control unit; 25. a baffle; 26. a first fixed frame; 27. a second fixed frame.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it should be apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the drawings, a schematic diagram of a nitrogen and oxygen generating device according to an embodiment of the invention is provided.
The invention provides a nitrogen and oxygen generating device, comprising: an air collection unit, an adsorption tower, an oxygen control unit 24, and a gas storage tank 23.
In the embodiment of the invention, the air collection unit is used for collecting air; the adsorption tower is internally provided with a carbon molecular sieve for removing oxygen in the air to obtain nitrogen with certain purity; the oxygen control unit 24 is used for controlling the flow of air in the adsorption tower, so as to control the proportion of nitrogen and oxygen generated by the adsorption tower; the gas tank 23 is used for storing nitrogen and oxygen generated by the adsorption tower.
The air collection unit is communicated with the air inlet end of the adsorption tower through a first one-way valve 10 and a first switch valve 13 which are sequentially arranged.
The gas outlet end of the adsorption tower is communicated with the gas storage tank 23 through the second switch valve 14, and the oxygen control unit 24 is arranged between the gas outlet end of the adsorption tower and the second switch valve 14.
The oxygen control unit 24 includes an exhaust pipe and a flow rate adjustment valve. The air inlet end of the exhaust pipe is communicated with the air outlet end of the adsorption tower through a flow regulating valve, and the air outlet end of the exhaust pipe is communicated with the atmosphere.
In the embodiment of the invention, when the flow regulating valve is closed, the adsorption tower can generate pure nitrogen, the flow regulating valve is opened, part of gas in the adsorption tower flows out of the exhaust pipe, the gas in the adsorption tower in unit time is increased along with the increase of the opening angle of the flow regulating valve, and the content of oxygen generated by the adsorption tower is increased along with the increase of the content of nitrogen because the amount of oxygen separated by the molecular sieve in unit time is constant.
In the embodiment of the present invention, the oxygen control unit 24 further includes an oxygen amount measuring device, and the oxygen amount measuring device is disposed in the exhaust pipe and is used for flexibly adjusting the opening degree of the flow regulating valve by detecting the oxygen content of the gas in the exhaust pipe. The oxygen measuring device is specifically an oxygen meter, and is commercially available.
The nitrogen and oxygen generating device provided by the embodiment of the invention can adjust the concentration of the oxygen and nitrogen generated by the adsorption tower by controlling the oxygen control unit 24 to obtain the required content of the oxygen and the nitrogen, and compared with a nitrogen generating device which directly purchases the nitrogen and the oxygen or only generates the nitrogen, the nitrogen and oxygen generating device can obviously reduce the test cost.
Further, in order to accelerate the generation of nitrogen and oxygen, the adsorption tower in the embodiment of the present invention includes: the first adsorption tower 8 and the second adsorption tower 9 are arranged in parallel, and the two adsorption towers can work simultaneously or can be switched to work mutually.
Further, when the two adsorption towers work in a switching mode, the air inlet end of the first adsorption tower 8 is communicated with the air inlet end of the second adsorption tower 9 through a third switch valve and a fourth switch valve which are arranged in parallel; the third switch valve comprises a switch valve A15 and a switch valve B16 which are arranged in series, and the fourth switch valve comprises a switch valve C17 and a switch valve D18 which are arranged in series; the air outlet end of the first switch valve 13 is communicated with the switch valve C17 and the switch valve D18; an exhaust port is provided between the on-off valve a 15 and the on-off valve B16.
In the embodiment of the invention, when the first adsorption tower 8 works, the switch valve C17 is opened, the switch valve A15, the switch valve B16 and the switch valve D18 are closed, and gas enters the first adsorption tower 8. The second adsorption tower 9 operates in the same manner. After the first adsorption tower 8 and the second adsorption tower 9 are operated, the on-off valve a 15 and the on-off valve B16 may be opened to empty the gas in the first adsorption tower 8 and the second adsorption tower 9, respectively.
Further, in order to prevent the gas in the first adsorption tower 8 from entering the second adsorption tower 9 when the first adsorption tower 8 operates, in the embodiment of the present invention, the gas outlet end of the first adsorption tower 8 is communicated with the gas outlet end of the second adsorption tower 9 through a fifth switch valve and a sixth switch valve which are arranged in parallel; the fifth switching valve comprises a switching valve E19 and a switching valve F20 which are arranged in series, and the sixth switching valve comprises a switching valve G21 and a switching valve H22 which are arranged in series; the intake end of the exhaust pipe, the intake end of the second on-off valve 14 are both in communication with the on-off valve E19 and the on-off valve F20.
In the embodiment of the invention, when the first adsorption tower 8 works, the switch valve C17 and the switch valve B16 are opened, the switch valve A15 and the switch valve D18 are closed, the switch valve E19 is opened, the switch valve F20, the switch valve G21 and the switch valve H22 are closed, gas enters the first adsorption tower 8, and the gas adsorbed in the second adsorption tower 9 is released through the exhaust port. After the first adsorption tower 8 finishes the adsorption, the adsorption tower is switched to a second adsorption tower 9 for adsorption by adopting the same method, and the first adsorption tower 8 empties the gas.
Further, the air collection unit includes: the air compressor 1, the first filter 2, the cold dryer 3, the second filter, the oil remover 6 and the air buffer tank 7 are sequentially communicated, and the air buffer tank 7 is arranged at the air inlet end of the first one-way valve 10.
In the embodiment of the invention, air enters an air compressor 1 for compression, then particulate matters are filtered out through a first filter 2, the temperature of the compressed air is reduced through a cooling dryer 3, the particulate matters are further filtered through a second filter, oil substances of the compressed air are removed, and finally the air enters an air buffer tank 7.
In embodiments of the present invention, the second filter preferably comprises a filter A4 and a filter B5 arranged in series, the arrangement of the two filters further purifying the air.
The invention also provides a specific embodiment of a method for generating nitrogen and oxygen by using the nitrogen and oxygen generating device.
In an embodiment of the present invention, the method for generating nitrogen and oxygen includes the following steps:
the air collection unit collects air, opens the first check valve 10 and the first switch valve 13 in sequence to make the air enter the adsorption tower, opens the second switch valve 14 simultaneously, and adjusts the flow control valve to control the flow of the air entering the adsorption tower, so that the nitrogen and oxygen generated by the adsorption tower enter the air storage tank 23 from the air outlet end.
Further, the method specifically comprises the following steps: air is compressed, dehumidified and deoiled by the air compressor 1, the first filter 2, the cold dryer 3, the second filter and the deoiler 6 in sequence and then enters the air buffer tank 7, then the first one-way valve 10 and the first switch valve 13 are opened, the switch valve C17 and the switch valve B16 are opened, the switch valve A15 and the switch valve D18 are closed, the switch valve E19 is opened, the switch valve F20, the switch valve G21 and the switch valve H22 are closed, the second switch valve 14 is opened, the flow control valve is adjusted, after the air enters the first adsorption tower 8, a part of the air coming out of the outlet end of the first adsorption tower 8 is discharged through the exhaust pipe, and the other part of the air enters the air storage tank 23 through the second switch valve 14.
The invention also provides a specific embodiment of the device for detecting the reaction performance of the catalyst in the thermal power plant. Referring to fig. 4, a schematic diagram of an apparatus for detecting a reaction performance of a catalyst in a thermal power plant according to an embodiment of the present invention is provided.
In the embodiment of the invention, the device for detecting the reaction performance of the catalyst in the thermal power plant comprises a flue gas generation unit, a flow measurement control unit, a temperature control unit, a multi-stage flue gas mixing unit and a catalytic reaction test unit which are sequentially communicated;
the flue gas generating unit comprises: the nitrogen and oxygen generating apparatus in the above embodiments.
In the embodiment of the invention, the flow measurement control unit is used for controlling the flow of various types of flue gas in the flue gas generation unit into the temperature control unit. The flow measurement control unit comprises a mass flow meter and a regulating valve.
The temperature control unit is used for controlling the temperature of the mixed flue gas. The temperature regulating unit comprises a digital display regulator and a silicon controlled voltage regulator so as to heat the flue gas to the required temperature.
The multi-stage flue gas mixing unit is used for fully mixing various flue gases, and the catalytic reaction testing unit is used for testing the reaction performance of the catalyst. And the air outlet end of the multi-stage flue gas mixing unit is connected with the catalytic reaction testing unit by a flange.
The catalytic reaction test unit comprises a flue gas main pipeline, 4 catalyst reactors, a temperature sensor and a valve. The 4 catalyst reactors are divided into two groups, 2 reactors in each group are arranged in series, and the two groups are arranged in parallel. The inlet and outlet of each reactor are provided with a valve and a corresponding flue gas pipeline. The flue gas firstly enters a flue gas main pipeline after passing through the diffusion mixing unit, and then can enter any group of catalyst reactors through the opening and closing of corresponding valves. Sampling holes are arranged at the inlet and the outlet of the catalyst reactor, and the content of each smoke component and the content of each outlet can be respectively measured by using measuring equipment, so that each reaction performance of the catalyst is calculated.
In the embodiment of the invention, the nitrogen and oxygen generating device is communicated with the flow measurement control unit through the second one-way valve 11.
In the embodiment of the present invention, the arrangement and connection manner of each structure in the flow measurement control unit, the temperature control unit, and the catalytic reaction test unit are the prior art, and are not described herein again.
Further, the smoke generating unit further comprises: mercury generator, NO gas cylinder and SO2Gas cylinder, NH3A gas cylinder and a water vapor generator.
In the embodiment of the invention, the mercury generating device, the NO gas cylinder and the SO2Gas cylinder, NH3The gas cylinder and the steam generator are respectively connected with a mass flow meter and a regulating valve for controlling the flow of different flue gases, thereby configuring the required flue gas components. And all the prepared flue gas enters the temperature control unit.
Further, the mercury generating device comprises a water bath device and a U-shaped pipe arranged in the water bath device, wherein a mercury reagent is arranged in the U-shaped pipe, and mercury vapor is generated after heating.
Further, please refer to fig. 2, which is a front view of the multi-stage flue gas mixing unit according to the embodiment of the present invention.
Referring to fig. 3, a cross-sectional view of the multi-stage flue gas mixing unit a is shown.
In order to better simulate the real SCR flue gas denitration environment, various flue gases are fully mixed. The multi-stage flue gas mixing unit comprises at least two mixing units which are connected in sequence; the mixing unit includes: the air deflector 25, the first fixed frame 26 and the second fixed frame 27, the air deflector 25 is fixed between the first fixed frame 26 and the second fixed frame 27; the guide plates 25 are wavy, and the guide plates 25 are arranged side by side in a staggered manner, so that the wave crests of the adjacent guide plates 25 are connected with the wave troughs.
In the embodiment of the present invention, the connection mode of the wave crests and the wave troughs of the adjacent guide plates 25 is welding, and the guide plates 25 are fixed to the first fixed frame 26 and the second fixed frame 27 by welding.
In the embodiment of the present invention, the number of the mixing units is three, and the three mixing units are connected by fixing rods, specifically, both ends of the fixing rods are respectively fixed to the corner of the second fixing frame 27 of the first mixing unit and the corner of the first fixing frame 26 of the second mixing unit, and the number of the fixing rods is the same as the number of the first fixing frame 26 or the second fixing frame 27.
As shown in the drawings, the first fixed frame 26 is identical to the second fixed frame 27 and has a rectangular shape, and a plurality of fixed bars are arranged in parallel.
In the embodiment of the invention, the smoke is subjected to turbulent diffusion of the three-stage mixing unit, so that all components of the smoke can be fully mixed, and the test accuracy is greatly improved.
Further, in order to avoid the environmental pollution caused by the flue gas after the catalytic reaction test unit tests, in the embodiment of the invention, the device for detecting the catalytic reaction performance of the catalyst in the thermal power plant further comprises a flue gas purification device communicated with the gas outlet of the catalytic reaction test unit, and the flue gas purification device is internally provided with activated carbon for adsorbing harmful substances.
Furthermore, the water outlet of the flue gas purification device is also provided with an induced draft fan, so that the flue gas can be accelerated to be rapidly discharged into the atmosphere.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A nitrogen and oxygen generating apparatus, comprising: the device comprises an air collecting unit, an adsorption tower, an oxygen control unit and an air storage tank;
a carbon molecular sieve is arranged in the adsorption tower;
the air collection unit is communicated with the air inlet end of the adsorption tower through a first one-way valve and a first switch valve which are sequentially arranged;
the gas outlet end of the adsorption tower is communicated with the gas storage tank through a second switch valve, and the oxygen control unit is arranged between the gas outlet end of the adsorption tower and the second switch valve;
the oxygen control unit includes: an exhaust pipe and a flow regulating valve;
the air inlet end of the exhaust pipe is communicated with the air outlet end of the adsorption tower through the flow regulating valve, and the air outlet end of the exhaust pipe is communicated with the atmosphere.
2. The nitrogen and oxygen generation device of claim 1, wherein the adsorption column comprises: the first adsorption tower and the second adsorption tower are arranged in parallel.
3. The nitrogen and oxygen generation device according to claim 2, wherein the gas inlet end of the first adsorption tower is communicated with the gas inlet end of the second adsorption tower through a third switch valve and a fourth switch valve which are arranged in parallel;
the third switch valve comprises a switch valve A and a switch valve B which are arranged in series, and the fourth switch valve comprises a switch valve C and a switch valve D which are arranged in series;
the air outlet end of the first switch valve is communicated with the switch valve C and the switch valve D;
an exhaust port is arranged between the switch valve A and the switch valve B.
4. The nitrogen and oxygen generation device according to claim 3, wherein the gas outlet end of the first adsorption tower is communicated with the gas outlet end of the second adsorption tower through a fifth switch valve and a sixth switch valve which are arranged in parallel;
the fifth switch valve comprises a switch valve E and a switch valve F which are arranged in series, and the sixth switch valve comprises a switch valve G and a switch valve H which are arranged in series;
and the air inlet end of the exhaust pipe and the air inlet end of the second switch valve are communicated with the switch valve E and the switch valve F.
5. The nitrogen and oxygen generating apparatus according to claim 1, wherein the air collecting unit comprises: the air compressor, the first filter, the cold dryer, the second filter, the oil remover and the air buffer tank are sequentially communicated;
the air buffer tank is arranged at the air inlet end of the first one-way valve.
6. A method of generating nitrogen and oxygen using the nitrogen and oxygen generating apparatus of any one of claims 1 to 5, comprising the steps of:
the air is collected to the air collecting unit, opens first check valve and first ooff valve in proper order and makes the air admission adsorption tower opens the second ooff valve simultaneously to adjust flow control valve control the air admission the flow of adsorption tower makes nitrogen gas and the oxygen that the adsorption tower generated get into the gas holder from giving vent to anger the end.
7. A device for detecting the reaction performance of a catalyst in a thermal power plant is characterized by comprising a flue gas generation unit, a flow measurement control unit, a temperature control unit, a multi-stage flue gas mixing unit and a catalytic reaction test unit which are sequentially communicated;
the smoke generating unit comprises: a nitrogen and oxygen generating apparatus according to any one of claims 1 to 5.
8. The apparatus of claim 7, wherein the smoke generation unit further comprises: mercury generator, NO gas cylinder and SO2Gas cylinder, NH3A gas cylinder and a water vapor generator.
9. The apparatus of claim 8, wherein the multi-stage flue gas mixing unit comprises at least two mixing units connected in series;
the mixing unit includes: the guide plate is fixed between the first fixing frame and the second fixing frame;
the guide plates are wavy, and the guide plates are arranged in a staggered mode side by side, so that wave crests of the adjacent guide plates are connected with wave troughs.
10. The device of claim 9, wherein the mercury generating device comprises a water bath device and a U-shaped tube disposed in the water bath device, the U-shaped tube containing a mercury reagent.
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