CN208588711U - SCR denitration demercuration integration catalyst integrated experiment device - Google Patents
SCR denitration demercuration integration catalyst integrated experiment device Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims abstract description 54
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- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a kind of SCR denitration demercuration integration catalyst integrated experiment devices.The characteristics of the utility model SCR denitration demercuration integration catalyst integrated experiment device, is: including mercury vapo(u)rization system, SO2Input unit, ammonia input unit, peristaltic pump, evaporative flask, premixer, preheating surge tank, catalytic reactor and ice bath device, the peristaltic pump are connected with evaporative flask, the mercury vapo(u)rization system, SO2Input unit, ammonia input unit, CO2Input unit, O2Input unit, nitrogen input unit, NO input unit and evaporative flask are connect with premixer, and the premixer is connected with preheating surge tank, and the preheating surge tank is connected with flowmeter, and the catalytic reactor is connected with ice bath device.The utility model is able to satisfy SCR denitration low temperature catalyst, SCR denitration demercuration integration catalyst test research.
Description
Technical Field
The utility model relates to a SCR denitration demercuration integration catalyst combined test device.
Background
During the combustion of coal, over 90% of mercury in coal is in granular form (Hg), except for a small part of mercury discharged with slagp) Mercury (Hg) in its oxidized state2+) And elemental mercury (Hg)0) Is present in the flue gas. Hg in flue gas passing through conventional flue gas treatment facilities2+Because of its good water solubility, most of it can be captured and removed by wet scrubbing system; most of the HgpCan be captured and removed by a dust remover; but Hg0The mercury removal method has the advantages of extremely high volatility, difficult water solubility and difficult removal, and the existing pollutant control device of the coal-fired power plant has low removal efficiency of total mercury due to large proportion in flue gas. Therefore, how to treat Hg0Conversion into Hg easy to remove2+And HgpIs to improve the existing pollutant control of coal-fired power plantsThe device is used for efficiently removing mercury in a synergic manner.
Research has shown that coal fired power plant SCR systems do promote the oxidation of elemental mercury. The principle of the removal is that the catalyst in the SCR system can catalyze and oxidize elemental mercury (Hg) to a certain extent0) And converted into divalent mercury (Hg) in an oxidized state2+) And thus more divalent mercury (Hg)2+) Can be removed by a subsequent desulfurization unit (e.g., wet desulfurization unit, WFGD), thereby reducing mercury pollution emitted to the air.
V in existing SCR catalysts2O5Has oxidation effect on elemental mercury, but the SCR catalyst has limited active center position and limited oxidation effect. In addition, it has a narrow temperature window for catalytic reaction and long-term exposure to high concentrations of fly ash and SO2Easy poisoning and failure under the environment and the like. Therefore, research and development of the SCR catalyst with low-temperature denitration activity and high mercury removal efficiency are important directions of next research work.
The existing SCR denitration catalyst performance test device has structural characteristics of the original design intention, and has the defects that real flue gas components cannot be completely simulated, the performance of a novel catalyst cannot be evaluated, and the like, for example, the publication date is 2017, 2, 15 and the publication number is CN205948624U in Chinese patent, an industrial flue gas dry-type low-temperature collaborative dust removal, desulfurization, denitration and mercury removal integrated device is disclosed, firstly desulfurization, dust removal and then removal of nitrogen oxide and mercury are adopted, so that the low-temperature SCR catalyst can be recycled, the abrasion of dust to the catalyst is avoided, the low-temperature SCR catalyst is prevented from oxidizing sulfur dioxide into sulfur trioxide, and the condition that the oxidized sulfur trioxide is reacted with ammonia to generate ammonium sulfate and the ammonium sulfate is condensed into viscous substances to influence the low-temperature denitration efficiency under the condition that the flue gas temperature is. Therefore need utility model a novel SCR denitration demercuration integration catalyst combined test device to satisfy the experimental research work demand of SCR denitration low temperature catalyst, SCR denitration demercuration integration catalyst. The method is used for quality control of the catalyst, service life evaluation of the used catalyst, and research of catalyst operating conditions and development and research work of new catalysts.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design is reasonable, satisfy SCR denitration low temperature catalyst, SCR denitration demercuration integration catalyst experimental research work demand's SCR denitration demercuration integration catalyst combined test device.
The utility model discloses can get rid of Hg to the catalyst sample of different preparation methods, different components, different load content0Testing the performance of (2); researching the influence of different reaction temperatures on the oxidation performance of the catalyst mercury; simulating the influence of the flue gas components on the oxidation performance of the catalyst mercury; removing Hg in flue gas by oxidizing SCR catalyst0Activity test results of (2) sample catalyst performance was evaluated.
The utility model provides a technical scheme that above-mentioned problem adopted is: this SCR denitration demercuration integration catalyst combined test device's structural feature lies in: comprises a mercury evaporation system, SO2Input unit, ammonia input unit, CO2Input unit, O2Input unit, nitrogen gas input unit, NO input unit, peristaltic pump, evaporating bottle, premixer, preheating buffer tank, inlet pipeline flue gas analyzer, inlet pipeline mercury tester, outlet pipeline flue gas analyzer, outlet pipeline mercury tester, flowmeter, catalytic reactor and ice bath device, the peristaltic pump is connected with the evaporating bottle, mercury evaporation system, SO input unit, NO input unit, peristaltic pump, evaporating bottle, premixer, preheating buffer tank, inlet pipeline flue gas analyzer, inlet pipeline mercury tester, outlet pipeline mercury tester, flowmeter, catalytic reactor and ice bath device2Input unit, ammonia input unit, CO2Input unit, O2Input unit, nitrogen gas input unit, NO input unit and evaporating flask all are connected with the premixer, the premixer is connected with preheating the buffer tank, preheat the buffer tank and be connected with the flowmeter, the flowmeter is connected with inlet pipeline flue gas analysis appearance and inlet pipeline mercury tester respectively, inlet pipeline flue gas analysis appearance and inlet pipeline mercury tester all are connected with catalytic reactor, catalytic reactor and ice bath device are connected, the ice bath device respectively with the ware of mixing with iceThe outlet pipeline flue gas analyzer is connected with the outlet pipeline mercury tester.
As preferred, mercury vaporization system includes that mercury permeation tube, constant temperature water bath and nitrogen gas bear the conveying unit, the constant temperature water bath is arranged in to the mercury permeation tube, nitrogen gas bears conveying unit and mercury permeation union coupling.
As preferred, SCR denitration demercuration integration catalyst combined test device still includes tail gas processing apparatus and fan, export pipeline flue gas analysis appearance and export pipeline mercury tester all are connected with tail gas processing apparatus, tail gas processing apparatus and fan are connected.
As preferred, mercury vaporization system passes through the pipe connection with the evaporating flask, is provided with electromagnetic flow control valve on this pipeline.
As preferred, import pipeline flue gas analysis appearance, import pipeline mercury tester, export pipeline flue gas analysis appearance and export pipeline mercury tester are the on-line analysis appearance structure.
Preferably, the outlet of the catalytic reactor is provided with a sampling port.
Preferably, the catalytic reactor comprises a tube furnace and a quartz reactor, wherein the quartz reactor is arranged in the tube furnace and is arranged in the direction perpendicular to the ground, and the center of the tube of the quartz reactor is filled with quartz cotton as a support bed of the catalyst.
A test method of an integrated test device of SCR denitration and demercuration catalyst is characterized in that: the procedure of the test method is as follows:
(1) putting a catalyst sample to be tested into a catalytic reactor, opening a nitrogen input unit, and filling N into the SCR denitration demercuration integrated catalyst comprehensive test device2；
(2) Detecting the air tightness of the device; before the test, the air tightness of the device is detected, and after the air tightness is detected to be qualified, the test is carried out;
(3) opening a heating device of the catalytic reactor, a heating device of the preheating buffer tank, a heating device of the evaporation bottle, a constant-temperature water bath and an ice bath device to enable the SCR denitration and demercuration integrated catalyst comprehensive test device to reach a set temperature;
(4) when the inlet temperature and the outlet temperature of the catalytic reactor reach set values, opening the O in sequence2Input unit, NO input unit, SO2The input unit and the mercury evaporation system are used for starting the peristaltic pump to directly inject water into the evaporation bottle for evaporation to generate steam, and the content of the steam reaches a set value by controlling the water quantity of the peristaltic pump; n is a radical of2、O2、NO、SO2The mercury and the gaseous water are preliminarily mixed in a pre-mixer and then enter a preheating buffer tank to uniformly mix the gases to obtain mixed gas;
(5) the mixed gas enters the catalytic reactor through a flow meter under the action of pressure, and is discharged from the lower part of the catalytic reactor after reacting in the catalytic reactor; when the temperature reaches a set value, opening an inlet pipeline flue gas analyzer, an inlet pipeline mercury tester, an outlet pipeline flue gas analyzer and an outlet pipeline mercury tester, simulating the flue gas to enter the inlet pipeline flue gas analyzer, the inlet pipeline mercury tester, the outlet pipeline flue gas analyzer and the outlet pipeline mercury tester, and measuring O in the mixed gas by the on-line flue gas analyzer2、NO、SO2Mercury, gaseous water content, and controlling O by adjusting control metering valve2、NO、SO2Mercury and gaseous water to make each component reach the preset value of the catalytic reactor inlet; after the gas components at the inlet of the catalytic reactor are stabilized, recording the O in the mixed gas at the inlet and the outlet simultaneously2、NO、SO2And the content of mercury and gaseous water, and the mercury catalytic oxidation rate and the denitration efficiency are obtained through calculation.
Preferably, the present invention further comprises the following steps: after the test is finished, the gas input unit is closed, the heating device of the catalytic reactor and the preheating buffer tank are closedHeating device, constant temperature water bath and ice bath device of heat facility, evaporating flask open nitrogen gas and bear the conveying unit, sweep pipeline, catalytic reactor, inlet pipe flue gas analysis appearance, inlet pipe mercury tester, outlet pipe flue gas analysis appearance and outlet pipe mercury tester, get rid of mercury steam, H that adsorb on the inner wall2O、NO、NH3、SO2。
Preferably, the data obtained by the experiment of the utility model are summarized into the removal efficiency at a certain moment, which is used for representing the removal performance of the catalyst on pollutants in the simulated flue gas; the weighed and prepared catalyst is loaded into a fixed bed reactor, a dynamic catalytic experiment is carried out at a certain reaction temperature, and the change of the concentration of pollutants at the outlet of the fixed bed along with the time is measured; gamma rayHgIs a catalyst for Hg0Removal efficiency of gammaNOFor catalyst efficiency of NO removal, γoxiCalculated from equation (1):
wherein,the concentration of the elemental mercury (unit: mu g/m) at the inlet and the outlet of the catalytic reactor respectively3)，ΔHg0Represents the change in elemental mercury concentration after passing through the catalyst;
γNOcalculated from equation (2):
wherein NOin，NOoutConcentration of NO (unit: mg/m) at inlet and outlet of catalytic reactor respectively3) (ii) a Δ NO represents the change in NO concentration after passing through the catalyst.
A small gas-solid catalytic reaction system is adopted to evaluate the mercury removal performance of a catalyst sample, and the system mainly comprises a simulated flue gas system, a mercury vapor generation system, a catalytic reaction system, a temperature control system, a test system and a tail gas purification system.
The smoke components in the simulated smoke system mainly comprise three parts of conventional smoke components, water vapor and mercury vapor, and the conventional smoke is provided by a standard gas cylinder and comprises CO2、O2、NO、SO2、H2O and balance gas N2In which N is2The air flow is divided into two paths, one path N2Gas flow with CO2，O2NO and SO2Mixing to form the main part of the simulated smoke, and the other path N2The gas flow passes through a U-shaped pipe of the mercury storage permeation pipe, the simple substance mercury is brought into the simulated flue gas, and then the simulated flue gas enters the preheating pipe. The flow of all gases is accurately controlled by a mass flowmeter, and the flow of various gases is controlled according to the test requirements, so that the flow in the pipeline is kept stable. The water vapor is generated by directly injecting water into the preheated buffer tube by adopting a micro peristaltic pump and evaporating, and the water vapor content reaches a set value by controlling the water quantity of the injection pump.
The mercury vapor generation system consists of three parts, namely a constant-temperature water bath kettle, a quartz U-shaped pipe and a mercury permeation pipe placed in the quartz U-shaped pipe. The U-shaped pipe for storing the mercury permeation pipe is arranged in the constant-temperature water bath kettle, and the generation amount of mercury is controlled by adjusting the temperature, so that the stability of the concentration of mercury in the simulated flue gas is ensured. Then by a carrier gas N2The gas stream carries elemental mercury into the catalytic reactor.
The catalytic reaction system mainly comprises a tubular furnace and a quartz reactor, wherein the quartz reactor is arranged in a direction vertical to the ground, and quartz wool is filled in the center of the tube to serve as a support bed of the catalyst. The quartz reactor is arranged in a tubular furnace with programmable temperature control, and the reaction temperature can be accurately controlled and adjusted through the tubular furnace.
The mercury analyzer is used for testing the mercury concentration in the flue gas, the mercury detector is used for eliminating the interference effect of other gas components to the maximum extent by adopting a high-frequency Zeeman effect background correction technology, the elemental mercury concentration in the flue gas can be monitored in real time, and the response time is 1 s. Before the flue gas enters the mercury detector, the ice bath condenser pipe is adopted to remove water vapor in the flue gas, so that the test error possibly caused by the water vapor and the corrosion of a mercury detector monitoring window are avoided. In addition, a flue gas analyzer was used to record the inlet and outlet NO volume concentrations.
The tail gas purification system is characterized in that after smoke is tested by a mercury detector, activated carbon impregnated with hydrochloric acid is used for adsorbing mercury in the smoke, and then the smoke is connected to a fume hood through a special pipeline for evacuation. All connecting pipelines in the system adopt polytetrafluoroethylene pipes. In order to avoid mercury condensation on the pipes, the pipes in front of the condenser are heated to above 90 ℃ by heating belts.
Furthermore, a metering adjusting valve is arranged on an outlet pipeline of each component gas cylinder, and the concentration can be automatically adjusted according to the concentration required to be set in the test.
Furthermore, a variable-frequency induced draft fan is arranged on an outlet pipeline of the tail gas purification system, and the variable-frequency induced draft fan is used for adjusting the pressure in the system, maintaining a micro-negative pressure state in the simulated flue gas channel and the reactor and avoiding indoor environmental pollution and personnel poisoning.
Furthermore, a premixer is arranged at the junction of each gas component, so that each gas component is fully mixed and then enters a subsequent reactor for reaction, and the influence on the test effect due to uneven mixing is avoided.
Furthermore, a gas preheating buffer is arranged behind the premixer, and a temperature tester is arranged to enable the mixed gas to reach the temperature required by the test and play a role in buffering.
Furthermore, a mercury detector and a smoke test analyzer are arranged behind the preheating buffer, so that the gas components entering the reactor can be conveniently adjusted to meet the test requirements. A mercury detector and a flue gas test analyzer are arranged on an outlet pipeline of the catalytic reactor and used for measuring components of flue gas at the outlet of the reactor so as to evaluate the catalytic oxidation effect of mercury and other gas component conditions.
The utility model has the advantages of it is more reasonable to design, is applicable to the experimental research work of SCR denitration low temperature catalyst, SCR denitration demercuration integration catalyst, and its beneficial effect lies in:
1) the mercury evaporation system and the water vapor evaporation device are arranged, so that the real simulated smoke components make up the defect that the conventional catalyst comprehensive test device cannot perform the test evaluation work of the catalytic oxidation performance of the catalyst mercury, the research work of the integrated performance test of the catalyst denitration and demercuration can be performed simultaneously, and the time cost is greatly shortened.
2) The gas pre-mixer is added, so that the gas components are fully mixed, and the influence of non-uniform mixing of the gas components on the test effect is eliminated.
3) The inlet and outlet pipelines of the reactor are provided with the mercury detectors and the flue gas analyzer, so that the conditions of flue gas components can be mastered in real time, and the running state can be adjusted in time conveniently.
Drawings
FIG. 1 is the embodiment of the utility model provides an SCR denitration demercuration integration catalyst combined test device's schematic structure.
In the figure: mercury evaporation system 10, SO2An input unit 11, an ammonia gas input unit 12, CO2Input unit 13, O2The system comprises an input unit 14, a nitrogen input unit 15, an NO input unit 16, a nitrogen carrying and conveying unit 17, a peristaltic pump 18, an evaporation bottle 19, a pre-mixer 20, a preheating buffer tank 21, an inlet pipeline flue gas analyzer 31, an inlet pipeline mercury tester 32, an outlet pipeline flue gas analyzer 33, an outlet pipeline mercury tester 34, a flow meter 35, a catalytic reactor 41, an ice bath device 51, a tail gas treatment device 52 and a fan 53.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1, the SCR denitration and demercuration integrated catalyst comprehensive test device in the embodiment includes a mercury evaporation system 10 and SO2An input unit 11, an ammonia gas input unit 12, CO2Input unit 13, O2The system comprises an input unit 14, a nitrogen input unit 15, a NO input unit 16, a peristaltic pump 18, an evaporation bottle 19, a pre-mixer 20, a preheating buffer tank 21, an inlet pipeline flue gas analyzer 31, an inlet pipeline mercury tester 32, an outlet pipeline flue gas analyzer 33, an outlet pipeline mercury tester 34, a flow meter 35, a catalytic reactor 41, an ice bath device 51, a tail gas treatment device 52 and a fan 53.
The peristaltic pump 18 in this embodiment is connected with the evaporation bottle 19, the mercury evaporation system 10, and the SO2An input unit 11, an ammonia gas input unit 12, CO2Input unit 13, O2The input unit 14, the nitrogen input unit 15, the NO input unit 16 and the evaporation bottle 19 are all connected with the pre-mixer 20, the pre-mixer 20 is connected with the pre-heating buffer tank 21, the pre-heating buffer tank 21 is connected with the flow meter 35, the flow meter 35 is respectively connected with the inlet pipeline flue gas analyzer 31 and the inlet pipeline mercury tester 32, the inlet pipeline flue gas analyzer 31 and the inlet pipeline mercury tester 32 are both connected with the catalytic reactor 41, the catalytic reactor 41 is connected with the ice bath device 51, and the ice bath device 51 is respectively connected with the outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34.
The mercury evaporation system 10 in this embodiment includes a mercury permeation tube, a constant temperature water bath, and a nitrogen-bearing transport unit 17, the mercury permeation tube is placed in the constant temperature water bath, and the nitrogen-bearing transport unit 17 is connected to the mercury permeation tube. The outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34 are both connected with a tail gas treatment device 52, and the tail gas treatment device 52 is connected with a fan 53.
The mercury evaporation system 10 in this embodiment is connected to the evaporation flask 19 by a pipe, which is provided with an electromagnetic flow control valve. The inlet pipeline flue gas analyzer 31, the inlet pipeline mercury tester 32, the outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34 are all in an on-line analyzer structure. The outlet of the catalytic reactor 41 is provided with a sampling port. The catalytic reactor 41 comprises a tube furnace and a quartz reactor, the quartz reactor is arranged in the tube furnace, the quartz reactor is arranged in a direction vertical to the ground, and the center of the tube of the quartz reactor is filled with quartz wool as a support bed of the catalyst.
The test method of the SCR denitration and demercuration integrated catalyst comprehensive test device in the embodiment comprises the following steps:
(1) putting a catalyst sample to be tested into the catalytic reactor 41, opening the nitrogen input unit 15, and filling the SCR denitration and demercuration integrated catalyst comprehensive test device with N2；
(2) Detecting the air tightness of the device; before the test, the air tightness of the device is detected according to the requirements of the leakage test part in SH 3501, and the test is carried out after the detection is qualified;
(3) opening a heating device of the catalytic reactor 41, a heating device of the preheating buffer tank 21, a heating device of the evaporation bottle 19, a constant-temperature water bath and an ice bath device 51 to enable the SCR denitration and demercuration integrated catalyst comprehensive test device to reach a set temperature;
(4) when the inlet temperature and the outlet temperature of the catalytic reactor 41 reach set values, for example, 320 ℃, the O is sequentially turned on2Input unit 14, NO input unit 16, SO2The input unit 11 and the mercury evaporation system 10 start the peristaltic pump 18 to directly inject water into the evaporation bottle 19 for evaporation to generate water vapor, and the water vapor content reaches a set value by controlling the water amount of the peristaltic pump 18; n is a radical of2、O2、NO、SO2Mercury and gaseous water are preliminarily mixed in a premixer 20 and then enter a preheating buffer tank 21, so that the gases are uniformly mixed to obtain mixed gas;
(5) the mixed gas enters the catalytic reactor 41 through the flow meter 35 under the action of pressure, reacts in the catalytic reactor 41 and then is catalyzedThe lower part of the chemical reactor 41 is discharged; when the temperature reaches the set value, the inlet pipeline flue gas analyzer 31, the inlet pipeline mercury tester 32, the outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34 are opened, the simulated flue gas enters the inlet pipeline flue gas analyzer 31, the inlet pipeline mercury tester 32, the outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34, and the online flue gas analyzer measures O in the mixed gas2、NO、SO2Mercury, gaseous water content, and controlling O by adjusting control metering valve2、NO、SO2Mercury and gaseous water to preset values of the components at the inlet of the catalytic reactor 41; when the flue gas components at the inlet of the catalytic reactor 41 reach preset values, the catalyst enters an aging process, the aging process is to adjust the flue gas parameters of the system stably as required, and after the flue gas is continuously introduced for 30 hours, SO in the flue gas at the outlet of the reactor 41 is added every 1 hour2And SO3And (5) detecting the concentration. When the same trend does not exist in the continuous 4 test data and the standard deviation of the test result is less than 10%, the aging of the new catalyst is finished, and the formal test stage can be entered.
And (3) performing ammonia injection through the ammonia input unit 12 according to the designed ammonia nitrogen molar ratio during formal test, and stabilizing and keeping for 1 h. Then, the concentrations of NO and elemental mercury at the inlet of the catalytic reactor 41 and the outlet of the catalytic reactor 41 were measured every 1.0 to 1.5 hours. During the test, when the smoke condition changes, the data acquisition can be carried out after lh is stabilized. At least 5 determinations were made. The test can be ended when the relative deviation of the measurement results of two adjacent times is not more than 10%. After the gas components at the inlet of the catalytic reactor 41 are stabilized, recording the O in the mixed gas at the inlet and the outlet simultaneously2、NO、SO2And the content of mercury and gaseous water, and the mercury catalytic oxidation rate and the denitration efficiency are obtained through calculation.
(6) After the test is finished, the gas input unit is closed, the heating device of the catalytic reactor 41, the heating device of the preheating buffer tank 21, the heating device of the evaporation bottle 19, the constant-temperature water bath and the ice bath device 51 are closed, the nitrogen bearing and conveying unit 17 is opened, and the pipeline, the catalytic reactor 41 and the inlet pipeline are connectedPurging the flue gas analyzer 31, the inlet pipeline mercury tester 32, the outlet pipeline flue gas analyzer 33 and the outlet pipeline mercury tester 34 to remove mercury vapor and H adsorbed on the inner wall2O、NO、NH3、SO2And the like.
The data obtained by the experiment are summarized into the removal efficiency at a certain moment, and the removal efficiency is used for representing the removal performance of the catalyst on pollutants in the simulated flue gas; the weighed and prepared catalyst is loaded into a fixed bed reactor, a dynamic catalytic experiment is carried out at a certain reaction temperature, and the change of the concentration of pollutants at the outlet of the fixed bed along with the time is measured; gamma rayHgIs a catalyst for Hg0Removal efficiency of gammaNOFor catalyst efficiency of NO removal, γoxiCalculated from equation (1):
wherein,the elemental mercury concentrations (unit: mu g/m) at the inlet and outlet of the catalytic reactor 413)，ΔHg0Represents the change in elemental mercury concentration after passing through the catalyst;
γNOcalculated from equation (2):
wherein NOin，NOoutConcentration of NO at the inlet and outlet of the catalytic reactor 41 (unit: mg/m)3) (ii) a Δ NO represents the change in NO concentration after passing through the catalyst.
The SCR denitration demercuration integrated catalyst comprehensive test device in the embodiment mainly comprises a simulated flue gas system, a mercury vapor generation system, a catalytic reaction system, a temperature control system, a test system and a tail gas purification system groupAnd (4) obtaining. By testing the O in the mixed gas of the inlet and the outlet2、NO、SO2And calculating the mercury catalytic oxidation rate and the denitration efficiency according to the contents of mercury and gaseous water so as to evaluate the performance of the sample catalyst.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides a SCR denitration demercuration integration catalyst combined test device which characterized in that: comprises a mercury evaporation system, SO2Input unit, ammonia input unit, CO2Input unit, O2Input unit, nitrogen gas input unit, NO input unit, peristaltic pump, evaporating bottle, premixer, preheating buffer tank, inlet pipeline flue gas analyzer, inlet pipeline mercury tester, outlet pipeline flue gas analyzer, outlet pipeline mercury tester, flowmeter, catalytic reactor and ice bath device, the peristaltic pump is connected with the evaporating bottle, mercury evaporation system, SO input unit, NO input unit, peristaltic pump, evaporating bottle, premixer, preheating buffer tank, inlet pipeline flue gas analyzer, inlet pipeline mercury tester, outlet pipeline mercury tester, flowmeter, catalytic reactor and ice bath device2Input unit, ammonia input unit, CO2Input unit, O2Input unit, nitrogen gas input unit, NO input unit and evaporating flask all are connected with the premixer, the premixer is connected with preheating the buffer tank, preheat the buffer tank and be connected with the flowmeter, the flowmeter is connected with inlet line flue gas analyzer and inlet line mercury tester respectively, inlet line flue gas analyzer and inlet line mercury tester all are connected with catalytic reactor, catalytic reactor and ice bath device are connected, the ice bath device is connected with outlet line flue gas analyzer and outlet line mercury tester respectively.
2. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: the mercury evaporation system comprises a mercury permeation tube, a constant-temperature water bath and a nitrogen bearing and conveying unit, wherein the mercury permeation tube is arranged in the constant-temperature water bath, and the nitrogen bearing and conveying unit is connected with the mercury permeation tube.
3. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: the SCR denitration demercuration integrated catalyst comprehensive test device further comprises a tail gas treatment device and a fan, wherein the outlet pipeline flue gas analyzer and the outlet pipeline mercury tester are both connected with the tail gas treatment device, and the tail gas treatment device is connected with the fan.
4. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: the mercury evaporation system is connected with the evaporation bottle through a pipeline, and an electromagnetic flow regulating valve is arranged on the pipeline.
5. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: the inlet pipeline flue gas analyzer, the inlet pipeline mercury tester, the outlet pipeline flue gas analyzer and the outlet pipeline mercury tester are all in an online analyzer structure.
6. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: and a sampling port is arranged at the outlet of the catalytic reactor.
7. The SCR denitration and demercuration integrated catalyst comprehensive test device of claim 1, characterized in that: the catalytic reactor comprises a tubular furnace and a quartz reactor, wherein the quartz reactor is arranged in the tubular furnace, the quartz reactor is arranged in a direction vertical to the ground, and quartz cotton is filled in the center of a tube of the quartz reactor to be used as a support bed of the catalyst.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061033A (en) * | 2018-07-10 | 2018-12-21 | 华电电力科学研究院有限公司 | SCR denitration demercuration integration catalyst integrated experiment device and test method |
| CN111397940A (en) * | 2020-04-30 | 2020-07-10 | 福建国环环境检测有限公司 | Test system and test method for simulating different smoke environments |
| CN114894954A (en) * | 2022-06-09 | 2022-08-12 | 上海康恒环境股份有限公司 | Catalyst performance detection device |
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2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061033A (en) * | 2018-07-10 | 2018-12-21 | 华电电力科学研究院有限公司 | SCR denitration demercuration integration catalyst integrated experiment device and test method |
| CN111397940A (en) * | 2020-04-30 | 2020-07-10 | 福建国环环境检测有限公司 | Test system and test method for simulating different smoke environments |
| CN114894954A (en) * | 2022-06-09 | 2022-08-12 | 上海康恒环境股份有限公司 | Catalyst performance detection device |
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