CN113552280A - Sulfur dioxide gas distribution device and method for detecting performance of flue gas denitration catalyst - Google Patents
Sulfur dioxide gas distribution device and method for detecting performance of flue gas denitration catalyst Download PDFInfo
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- CN113552280A CN113552280A CN202110817723.0A CN202110817723A CN113552280A CN 113552280 A CN113552280 A CN 113552280A CN 202110817723 A CN202110817723 A CN 202110817723A CN 113552280 A CN113552280 A CN 113552280A
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 239000007789 gas Substances 0.000 title claims abstract description 97
- 239000003054 catalyst Substances 0.000 title claims abstract description 31
- 238000009826 distribution Methods 0.000 title claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000012544 monitoring process Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000009834 vaporization Methods 0.000 claims abstract description 12
- 230000008016 vaporization Effects 0.000 claims abstract description 12
- 238000003860 storage Methods 0.000 claims description 56
- 238000010926 purge Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
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- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides a sulfur dioxide gas distribution device and a sulfur dioxide gas distribution method for detecting the performance of a flue gas denitration catalyst, wherein the device comprises a conveying system and a heating system which are sequentially connected, the heating system is used for heating sulfur dioxide to be completely vaporized, a data monitoring system is arranged on the heating system, the data monitoring system monitors the environment of the heating system in real time and sends the monitoring result to an intelligent control unit, and the conveying system and the heating system are electrically connected with the intelligent control unit. The sulfur dioxide distribution device ensures that sulfur dioxide is in a complete vaporization state in the conveying process, effectively solves the problem that liquid sulfur dioxide blocks a flowmeter, thereby ensuring the smooth performance detection of the catalyst, and has the advantages of no need of manual intervention, intelligent adjustment and convenient operation.
Description
Technical Field
The invention relates to the technical field of performance detection of flue gas denitration catalysts, in particular to a sulfur dioxide gas distribution device and method for performance detection of flue gas denitration catalysts.
Background
Selective catalytic oxidation reduction (SCR) is the most widely used technology for flue gas denitration in coal-fired power plants, and a catalyst is the core of the SCR technology. In order to evaluate the performance of the catalyst and track the life attenuation condition of the catalyst, so as to establish a catalyst loading, replacing or regenerating management scheme, research institutions such as various catalyst manufacturers, electric power science research institutes, colleges and universities develop the performance detection and evaluation work of the catalyst at a time. The performance detection and evaluation of the catalyst mainly adopts a pilot test bench or a full-scale test bench to carry out detection work and consists of a gas distribution system, a preheating system, a reactor system, a flue gas analysis system and a tail gas treatment system. By simulating the actual flue gas conditions, the denitration efficiency, activity and SO of the catalyst2/SO3Conversion, ammonia slip and pressure drop were measured. The simulated flue gas is generally prepared from nitrogen, oxygen, nitric oxide, sulfur dioxide, ammonia and water.
As the gas consumption of sulfur dioxide in a pilot test of the performance detection of the flue gas denitration catalyst and a full-size test bed is larger, the gas source is liquid pure gas. Usually, liquid sulfur dioxide is conveyed to a flowmeter from a low-temperature storage tank through a pipeline for proportional distribution, and the pipeline heating and heat preservation possibly has the phenomenon that the liquid sulfur dioxide cannot be completely vaporized due to long conveying pipeline and large flow, so that the liquid sulfur dioxide is not completely vaporized in actual gas distribution, and the liquid sulfur dioxide is accumulated when reaching a flow meter, so that the flowmeter is blocked, the gas distribution cannot be performed, and the performance test of the catalyst is influenced.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a sulfur dioxide gas distribution device for detecting the performance of a flue gas denitration catalyst, which ensures that sulfur dioxide is in a complete vaporization state in the conveying process, and effectively solves the problem that liquid sulfur dioxide blocks a flowmeter, thereby ensuring the smooth performance detection of the catalyst.
The second purpose of the invention is to provide a sulfur dioxide gas distribution method for detecting the performance of a flue gas denitration catalyst, which does not need manual intervention, is intelligently adjusted and is convenient to operate.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a sulfur dioxide gas distribution device for detecting the performance of a flue gas denitration catalyst, which comprises a conveying system and a heating system which are sequentially connected, wherein the heating system is used for heating sulfur dioxide to be completely vaporized, a data monitoring system is arranged on the heating system, the data monitoring system monitors the environment of the heating system in real time and sends the monitoring result to an intelligent control unit, and the conveying system and the heating system are electrically connected with the intelligent control unit.
Further, heating system is including first gas holder and the second gas holder of series connection intercommunication, first gas holder and second gas holder all are provided with heating module, heating module and intelligent control unit electric connection.
Further, the data monitoring system comprises a temperature monitoring unit and a pressure monitoring unit, wherein the temperature monitoring unit and the pressure monitoring unit are electrically connected with the intelligent control unit.
Further, the temperature monitoring unit comprises a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged on the upper portion of the first air storage tank and the upper portion of the second air storage tank; and the lower parts of the first air storage tank and the second air storage tank are both provided with second temperature sensors.
Further, the pressure monitoring unit comprises a pressure sensor, and the upper parts of the first air storage tank and the second air storage tank are both provided with the pressure sensor.
Further, conveying system includes pipeline, pipeline is last to be set gradually first ooff valve and to be used for preventing the first check valve of sulfur dioxide gas adverse current, first ooff valve with intelligent control unit electric connection.
Further, automatic pressure relief valves are arranged at the top of the first air storage tank and the top of the second air storage tank; and liquid discharge valves are arranged at the bottom of the first air storage tank and the bottom of the second air storage tank.
Further, still include the anti-unit of sweeping, the unit setting is swept on pipeline to the anti-blow, and with intelligent control unit electric connection.
Furthermore, the back flushing unit comprises an air inlet pipeline, a second switch valve and a second one-way valve used for preventing the backflow of the flushing gas are sequentially arranged on the air inlet pipeline, and the second switch valve is electrically connected with the intelligent control unit.
In addition, the invention also provides a sulfur dioxide gas distribution method for detecting the performance of the flue gas denitration catalyst, which comprises the following steps:
and conveying the sulfur dioxide to a heating system for heating and vaporization, and then entering a subsequent process, wherein the intelligent control unit in the steps realizes automatic regulation and control of the process.
Compared with the prior art, the invention has the beneficial effects that:
the sulfur dioxide gas distribution device for detecting the performance of the flue gas denitration catalyst ensures that sulfur dioxide is in a complete vaporization state in the conveying process, and effectively solves the problem that liquid sulfur dioxide blocks a flowmeter, so that the performance detection of the catalyst is ensured to be carried out smoothly, and the whole device does not need manual intervention, is intelligently adjusted and is convenient to operate.
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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a sulfur dioxide distribution device for detecting the performance of a flue gas denitration catalyst.
Description of reference numerals:
1-a first gas reservoir; 2-a second gas storage tank;
3-heating the module; 41-a first temperature sensor;
42-a second temperature sensor; 5-a pressure sensor;
6-automatic pressure relief valve; 7-a drain valve;
8-a conveying pipeline; 81-a first on-off valve;
82-a first one-way valve; 9-an air inlet pipeline;
91-a second on-off valve; 92-second one-way valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the sulfur dioxide distribution device for detecting the performance of a flue gas denitration catalyst provided by the invention comprises a conveying system and a heating system which are sequentially connected, wherein the heating system is used for heating sulfur dioxide to be completely vaporized, the heating system is provided with a data monitoring system, the data monitoring system monitors the environment of the heating system in real time and sends the monitoring result to an intelligent control unit, and the conveying system and the heating system are electrically connected with the intelligent control unit. Sulfur dioxide passes through conveying system and carries to heating system, heating system heats the back to sulfur dioxide, make in the sulfur dioxide reentrant subsequent handling after the complete vaporization, it is in complete vaporization state in transportation process to have guaranteed the sulfur dioxide, the problem of liquid sulfur dioxide jam flowmeter has effectively been solved, thereby guarantee going on smoothly of catalyst performance detection, and at this in-process, the intelligent control unit is through received environment real-time supervision data, carry out automated regulation and control to conveying system and heating system, whole operation need not artificial intervention, the security and the stability of the whole equipment have been improved.
Specifically, heating system includes first gas holder 1 and the second gas holder 2 of series connection intercommunication, and first gas holder 1 and second gas holder 2 all are provided with heating module 3, heating module 3 and intelligent control unit electric connection, and heating module 3 of first gas holder 1 heats sulfur dioxide, gets into second gas holder 2 after the sulfur dioxide vaporization, and heating module 3 of second gas holder 2 reheats sulfur dioxide and keeps warm. The two sets of gas storage tanks can ensure sufficient heating to ensure the sulfur dioxide to be completely vaporized, in addition, the pressure in the liquid vaporization process is not stable, and the two sets of gas storage tanks can also play a role in stabilizing the pressure. It can be understood that the heating manner of the heating module 3 is not particularly limited as long as the purpose of heating can be satisfied, and in this embodiment, the heating module 3 is an aluminum block coated heating and is disposed on the outer peripheral surfaces of the first gas storage tank 1 and the second gas storage tank 2. In addition, the specific structure of the first and second gas tanks 1 and 2 is not strictly limited, and for example, a cylindrical gas tank having a height of 200mm may be used. The volume of the air reservoir is not strictly limited, for example, 25L is used.
Particularly, the data monitoring system comprises a temperature monitoring unit and a pressure monitoring unit, and the temperature monitoring unit and the pressure monitoring unit are electrically connected with the intelligent control unit. Further, the temperature monitoring unit includes a first temperature sensor 41 and a second temperature sensor 42, the first temperature sensor 41 is disposed on the upper portion of the first air tank 1 and the upper portion of the second air tank 2, and the second temperature sensor 42 is disposed on the lower portion of the first air tank 1 and the lower portion of the second air tank 2. The measuring points of the temperature sensors in the first gas storage tank 1 and the second gas storage tank 2 are arranged in the same mode, so that the temperature of sulfur dioxide in different areas in the gas storage tanks can be reasonably monitored, the state of a sulfur dioxide medium at the height position of the measuring point is judged according to the temperature monitoring result, and the vaporization state of the sulfur dioxide is effectively ensured. The pressure monitoring unit includes pressure sensor 5, and the upper portion of first gas holder 1, the upper portion of second gas holder 2 all are provided with pressure sensor 5, and pressure sensor 5 can adopt the welding mode to be fixed in on the gas holder, can guarantee the gas tightness and the security of whole result.
In this embodiment, automatic relief valves 6 are provided at the top of the first gas storage tank 1 and the top of the second gas storage tank 2, liquid discharge valves 7 are provided at the bottom of the first gas storage tank 1 and the bottom of the second gas storage tank 2, and if the pressure in the tank body is too high and exceeds the safety set value of the automatic relief valves, sulfur dioxide gas is automatically discharged to reduce the pressure in the gas storage tanks, thereby ensuring the safe working pressure, and the safety set value of the automatic relief valves is not specifically limited. When the gas storage tank needs to be cleaned, the liquid discharge valve 7 is opened to discharge the substances in the tank body, and then the gas storage tank is cleaned.
In addition, the conveying system comprises a conveying pipeline 8, a first switch valve 81 and a first one-way valve 82 for preventing the sulfur dioxide gas from flowing reversely are sequentially arranged on the conveying pipeline 8, and the first switch valve 81 is electrically connected with the intelligent control unit. When the temperature value of the upper temperature sensor 41 of the first air tank 1 is lower than the preset control temperature or the temperature value of the upper temperature sensor 41 of the second air tank 2 is lower than the control temperature, the first switch valve 81 of the inlet unit is closed, and air inlet is stopped; when the temperature value of the upper temperature sensor 41 of the first air tank 1 is lower than the control temperature and the temperature value of the upper temperature sensor 41 of the second air tank is higher than the control temperature, the first on-off valve 81 of the inlet unit is opened to start air intake.
When the pressure value of the pressure sensor 5 of the first air storage tank 1 is higher than the control pressure or the pressure value of the pressure sensor 5 of the second air storage tank 2 is higher than the control pressure, the first switch valve 81 of the inlet unit is closed, and air inlet is stopped; when the pressure value of the first air storage tank 1 is lower than the control pressure and the pressure value of the second air storage tank 2 is lower than the control pressure, the first switch valve 81 of the inlet unit is opened, and air inlet is started.
In this embodiment, still include the anti-unit of sweeping, the unit of sweeping is set up on pipeline 8 to the blowback, and with intelligent control unit electric connection, specifically, the unit of sweeping is swept to the blowback includes inlet line 9, has set gradually second ooff valve 91 on the inlet line 9 and is used for preventing to sweep the second check valve 92 of gaseous countercurrent, second ooff valve 91 and intelligent control unit electric connection. When cleaning is needed, the back-blowing gas is introduced through the back-blowing unit to blow, so that cleanness of the first gas storage tank 1 and the second gas storage tank 2 is guaranteed, and the device effectively improves the cleanliness and reliability of the sulfur dioxide conveying and post-stage gas using device. The second switch valve 91 is electrically connected with the intelligent control unit and can be used for controlling the air inlet of the blowing air source to be opened and closed, and the second one-way valve 92 is used for preventing the blowing air of the first air storage tank 1 from flowing reversely. The form of the purge gas is not limited and high purity nitrogen gas may be used.
The working process and principle of the sulfur dioxide configuration device for detecting the performance of the flue gas denitration catalyst are briefly described below.
Sulfur dioxide is through opening first ooff valve 81 to through first check valve 82, get into the first gas holder 1 of gas storage unit, the heating module 3 of first gas holder 1 heats sulfur dioxide, and the sulfur dioxide vaporization back gets into second gas holder 2, and the heating module 3 of second gas holder 2 reheats sulfur dioxide and keeps warm, along with carry to the flue gas denitration catalyst performance detection device of low reaches through the pipeline.
When the temperature value of the lower temperature sensor 42 of the first gas storage tank 1 is lower than the control temperature, the heating module 3 of the first gas storage tank heats the liquid sulfur dioxide to fully vaporize the liquid sulfur dioxide until the temperature reaches the control temperature; when the temperature value of the lower temperature sensor 42 of the second gas storage tank 2 is lower than the control temperature, the heating module 3 of the second gas storage tank 2 heats the sulfur dioxide gas and keeps the temperature until the temperature reaches the control temperature.
In the sulfur dioxide gas distribution method for detecting the performance of the flue gas denitration catalyst, the preset control temperature of the lower part of a first gas storage tank 1 is 10 ℃, and the control temperature of the upper part is 10 ℃; the lower part of the first gas storage tank 2 is controlled to have the temperature of 30 ℃, the preset control pressure of the first gas storage tank 1 is 0.5MPa, and the control pressure of the second gas storage tank 2 is 0.5 MPa.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a sulfur dioxide distributing device that flue gas denitration catalyst performance detected, its characterized in that, including the conveying system and the heating system that connect gradually, heating system is used for heating sulfur dioxide to complete vaporization, the last data monitoring system that is provided with of heating system, data monitoring system to heating system's environment real-time supervision and with monitoring result send intelligent control unit to, conveying system, heating system all with intelligent control unit electric connection.
2. The sulfur dioxide gas distribution device according to claim 1, wherein the heating system comprises a first gas storage tank and a second gas storage tank which are communicated in series, the first gas storage tank and the second gas storage tank are both provided with a heating module, and the heating module is electrically connected with the intelligent control unit.
3. The sulfur dioxide gas distribution device of claim 1, wherein the data monitoring system comprises a temperature monitoring unit and a pressure monitoring unit, and both the temperature monitoring unit and the pressure monitoring unit are electrically connected with the intelligent control unit.
4. The sulfur dioxide gas distribution device according to claim 3, wherein the temperature monitoring unit comprises a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged on the upper part of the first gas storage tank and the first temperature sensor is arranged on the upper part of the second gas storage tank; and the lower parts of the first air storage tank and the second air storage tank are both provided with second temperature sensors.
5. The sulfur dioxide gas distribution device according to claim 3, wherein the pressure monitoring unit comprises a pressure sensor, and the pressure sensor is arranged on each of the upper part of the first gas storage tank and the upper part of the second gas storage tank.
6. The sulfur dioxide gas distribution device according to claim 1, wherein the conveying system comprises a conveying pipeline, a first switch valve and a first one-way valve for preventing the sulfur dioxide gas from flowing backwards are sequentially arranged on the conveying pipeline, and the first switch valve is electrically connected with the intelligent control unit.
7. The sulfur dioxide gas distribution device according to claim 2, wherein the top of the first gas storage tank and the top of the second gas storage tank are provided with automatic pressure relief valves; and liquid discharge valves are arranged at the bottom of the first air storage tank and the bottom of the second air storage tank.
8. The sulfur dioxide gas distribution device according to claim 6, further comprising a back purging unit, wherein the back purging unit is disposed on the delivery pipe and electrically connected to the intelligent control unit.
9. The sulfur dioxide gas distribution device according to claim 8, wherein the back purge unit comprises a gas inlet pipeline, a second switch valve and a second one-way valve for preventing the backflow of the purge gas are sequentially arranged on the gas inlet pipeline, and the second switch valve is electrically connected with the intelligent control unit.
10. A sulfur dioxide gas distribution method for detecting the performance of a flue gas denitration catalyst is characterized by comprising the following steps:
and conveying the sulfur dioxide to a heating system for heating and vaporization, and then entering a subsequent process, wherein the intelligent control unit in the steps realizes automatic regulation and control of the process.
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