CN202533420U - Evaluation system for testing performance of selective catalytic reduction (SCR) denitration catalyst - Google Patents
Evaluation system for testing performance of selective catalytic reduction (SCR) denitration catalyst Download PDFInfo
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- CN202533420U CN202533420U CN2012200672908U CN201220067290U CN202533420U CN 202533420 U CN202533420 U CN 202533420U CN 2012200672908 U CN2012200672908 U CN 2012200672908U CN 201220067290 U CN201220067290 U CN 201220067290U CN 202533420 U CN202533420 U CN 202533420U
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Abstract
The utility model discloses an evaluation system for testing the performance of a selective catalytic reduction (SCR) denitration catalyst. The evaluation system comprises a simulated flue gas generation device, an ammonia generation device, a catalytic reactor device, a temperature control device, an unreacted flue gas analysis device and a reacted flue gas analysis device, wherein the simulated flue gas generation device simulates a flue gas generated by an actual boiler, and is connected with the catalytic reactor device through a pipeline which is a before-reaction main pipeline; the unreacted flue gas analysis device and the ammonia generation device are communicated with the before-reaction main pipeline; the catalytic reactor device performs SCR on the flue gas which enters; the temperature control device surrounds the before-reaction main pipeline and the catalytic reactor device; a flue gas outlet pipe of the catalytic reactor device is connected with the reacted flue gas analysis device; and a reacted flue gas enters the reacted flue gas analysis device. By the evaluation system, the actual working condition of a power plant can be simulated, and an SO2/SO3 conversion rate, NH3 escape, denitration efficiency and pressure drop can be tested.
Description
Technical field
The utility model relates to the catalyst performance evaluation device, specifically is meant a kind of evaluation system that is used to test SCR denitrating catalyst performance.
Background technology
Oxides of nitrogen (NOx) is one of main atmosphere pollution, is the main matter that forms acid rain and photo-chemical smog, and health is had bigger harm.Simultaneously, NOx can generate the nitrate and the nitric acid particulate of sub-micron through atmosphere chemically react, is to form that regional fine particle pollutes and the major reason of grey haze.Fire coal is the main source of NOx discharging, and it serves as big wherein occupying proportion with the thermoelectricity fire coal." thermal power plant's air pollution emission standard " of issue in 2011 (GB13223-2011) in, the NOx emission limit is reduced to 100mg/m3 by 450mg/m3, NOx control is imperative.
In the NOx control technology, selective catalytic reduction (SCR) denitration technology is the denitration technology of the highest, the tool market outlook of denitration efficiency, has become the first-selection of efficiently controlling the NOx discharging in the world.Its cardinal principle is that reductive agent (liquefied ammonia, ammoniacal liquor, urea) is sprayed in the flue gas, in suitable temperature and have under the condition that catalyzer exists, reductive agent " selective " with flue gas in the NOx reaction and generate the nitrogen G&W.
Catalyzer is the core of SCR gas denitrifying technology, and the performance of catalyzer is the principal element that influences SCR denitration efficiency and economy.The performance evaluation of SCR catalyzer generally by the test of Catalyst Production manufacturer or carry out medium-sized performance test, is tested the performance of whole catalyst elements.This proving installation exists the test duration long, and experimentation cost is high, Gas Parameters is regulated shortcomings such as difficulty.
The utility model content
The purpose of the utility model provides a kind of evaluation system that is used to test SCR denitrating catalyst performance, and this evaluation system compact conformation, integrated testability temperature be uniform and stable, can simulate actual power plant operating mode adopts multi-layer catalyst to arrange, can test SO simultaneously
2/ SO
3Conversion ratio, NH
3Escape, denitration efficiency and pressure fall, and the test duration is short and cost is low.
The above-mentioned purpose of the utility model realizes through following technical scheme: a kind of evaluation system that is used to test SCR denitrating catalyst performance; It is characterized in that: this evaluation system comprises simulated flue gas generating means, ammonia gas generating device, catalytic reactor device, temperature control equipment, the preceding flue gas analysis device of reaction and reaction back flue gas analysis device; Described simulated flue gas generating means is simulated the flue gas that actual boiler produces; Described simulated flue gas generating means links to each other with catalytic reactor device; The pipeline that both link to each other is the preceding trunk line of reaction; Flue gas analysis device and ammonia gas generating device all are communicated with the preceding trunk line of said reaction before the said reaction; The preceding trunk line junction of flue gas analysis device and reaction is positioned at before ammonia gas generating device and the preceding trunk line junction of reaction before reacting; Said catalytic reactor device is carried out the SCR reaction to the flue gas that gets into; Said temperature control equipment ring encloses described catalytic reactor device and the preceding trunk line of reaction, and with the temperature of control simulated flue gas temperature and catalytic reactor device, the flue gas efferent duct of catalytic reactor device links to each other with said reaction back flue gas analysis device; Flue gas after the catalytic reaction gets into reaction back flue gas analysis device and carries out flue gas analysis behind the flue gas efferent duct, through the test and assess desulphurization denitration performance of catalyzer of the Gas Parameters of analyzing the forward and backward flue gas analysis measurement device of contrast reaction.
In the utility model; Described simulated flue gas generating means comprises source of the gas generating unit, water vapour generating unit and mixer; Described source of the gas generating unit comprises continuous source of the gas generator and mass flowmeter, and described water vapour generating unit comprises the H that links to each other successively
2O storage tank, volume pump and carburetor, described mass flowmeter is connected with mixer respectively with carburetor, and described mixer is communicated with the preceding trunk line of said reaction.
In the utility model, described ammonia gas generating device comprises ammonia source, mass flowmeter and the ammonia nozzle that links to each other successively, and trunk line is provided with ammonia/flue gas mixer before the said reaction, and described ammonia nozzle extend in said ammonia/flue gas mixer.
In the utility model; Described catalytic reactor device is made up of 1～3 catalytic reaction unit that is in series, and to simulate the catalyzer number of plies in the SCR system of actual power station, described catalytic reaction unit comprises reaction tube, supports grid and catalyst samples piece; Described support grid is welded in the reaction tube; And be positioned at the lower end of reaction tube, catalyst samples piece support connects through flange between the adjacent reaction tube supporting on the grid.
In the utility model, described reaction tube is a rectangular tube, and said catalyst samples piece is honeycomb fashion, board-like or corrugated plate dst structure.
In the utility model, described temperature control equipment comprises heating cabinet and temperature conditioning unit, and trunk line and catalytic reactor device are positioned at this heating cabinet before the said reaction, and said temperature conditioning unit links to each other with heating cabinet, the work of control heating cabinet.
In the utility model, said heating cabinet is the electrical heating case, and said heating cabinet coats one deck heat-preservation cotton outward.
In the utility model, the flue gas analysis device comprises SO before the said reaction
2With NO analytic unit and SO
3Analytic unit, described SO
2With the NO analytic unit be flue gas analyzer, described SO
3Analytic unit comprises successively sample bypass, valve, condenser pipe, condensate bottle, circulator bath and the sampling pump that links to each other, described flue gas analyzer and sample bypass respectively with said reaction before trunk line be communicated with.
In the utility model, said reaction back flue gas analysis device comprises SO
2With NO analytic unit, ammonia analytic unit and SO
3Analytic unit, described SO
2Comprise condenser, gas-liquid separator and the flue gas analyzer that links to each other successively with the NO analytic unit, described ammonia analytic unit comprises sample bypass, valve, absorption bottle and the sampling pump that links to each other successively, described SO
3Analytic unit comprises sample bypass, valve, condenser pipe, condensate bottle, circulator bath and the sampling pump that links to each other successively, the sample bypass and the SO of described condenser, ammonia analytic unit
3The sample bypass of analytic unit is communicated with the flue gas efferent duct of said catalytic reactor device respectively.
The evaluation system of the utility model, compact conformation, it is uniform and stable that the integrated testability temperature keeps, and can simulate actual power plant operating mode and adopt multi-layer catalyst to arrange, can test SO simultaneously
2/ SO
3Conversion ratio, NH
3Escape, denitration efficiency and pressure fall, and the test duration is short, cost is low, can be used for the SCR denitrating catalyst in fresh SCR denitrating catalyst and the actual motion is carried out performance evaluation, have significant technical economic benefit.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
Fig. 1 is the one-piece construction synoptic diagram of the utility model evaluation system;
Fig. 2 is the synoptic diagram of the simulated flue gas generating means in the utility model evaluation system;
Fig. 3 is the synoptic diagram of the ammonia gas generating device in the utility model evaluation system;
Fig. 4 is the composition synoptic diagram of the catalyst reaction device in the utility model evaluation system;
Fig. 5 is the composition synoptic diagram of the temperature control equipment in the utility model evaluation system;
Fig. 6 is the composition synoptic diagram of flue gas analysis device before the reaction in the utility model evaluation system;
Fig. 7 is the composition synoptic diagram of flue gas analysis device after the reaction in the utility model evaluation system.
Embodiment
Like Fig. 1 to a kind of evaluation system that is used to test SCR denitrating catalyst performance shown in Figure 7; This evaluation system comprises simulated flue gas generating means 100, ammonia gas generating device 200, catalytic reactor device 300, temperature control equipment 400, the preceding flue gas analysis device 500 of reaction and reaction back flue gas analysis device 600; The flue gas that the actual boiler of simulated flue gas generating means 100 simulations produces; Simulated flue gas generating means 100 links to each other with catalytic reactor device 300; The pipeline that both link to each other is the preceding trunk line 170 of reaction; Flue gas analysis device 500 all is communicated with the preceding trunk line of reaction with ammonia gas generating device 200 before the reaction; Before the trunk line junction, the flue gas of 300 pairs of entering of catalytic reactor device carried out the SCR reaction before the preceding flue gas analysis device 500 of reaction was positioned at ammonia gas generating device 200 and reacts with the preceding trunk line junction of reaction, and temperature control equipment 400 encircles and encloses preceding trunk line 170 of reaction and catalytic reactor device 300; Temperature with control flue-gas temperature and catalytic reactor device 300; The flue gas efferent duct 370 of catalytic reactor device 300 links to each other with reaction back flue gas analysis device 600, and the flue gas after the catalytic reaction gets into reaction back flue gas analysis device 600 and carries out flue gas analysis behind the flue gas efferent duct, contrasts the test and assess denitration performance of catalyzer of the Gas Parameters of reacting forward and backward flue gas analysis measurement device through analyzing.
As shown in Figure 2, simulated flue gas generating means 100 comprises source of the gas generating unit, water vapour generating unit and mixer 160, and the source of the gas generating unit comprises continuous source of the gas generator 140 and mass flowmeter 150, and the water vapour generating unit comprises the H that links to each other successively
2 O storage tank 110, volume pump 120 and carburetor 130; Mass flowmeter 150 is connected with mixer 160 respectively with carburetor 160; Mixer is communicated with the preceding trunk line 170 of reaction, is communicated with the mouth of pipe that the position is positioned at the preceding trunk line 170 of reaction, and source of the gas generator 140 produces high pure nitrogen, oxygen, CO
2, NO, SO
2, the water vapour generating unit produces H
2O steam, the H in the flue gas
2O realizes that through deionized water vaporization back mixer 160 is with high pure nitrogen, oxygen, CO
2, NO, SO
2, H
2Input was reacted in the preceding trunk line 170 after the O vapor mixing became the simulated flue gas consistent with catalyzer actual operating mode smoke components; Each composition in the actual flue gas is through mass flowmeter 150 and volume pump 120 respectively after the Control Flow, gets into and gets into trunk line 170 before the reaction after mixer 160 fully mixes again.
As shown in Figure 3; Ammonia gas generating device 200 comprises ammonia source 210, mass flowmeter 220 and the ammonia nozzle 230 that links to each other successively; Trunk line 170 is provided with ammonia/flue gas mixer 240 before the reaction; Ammonia nozzle 230 extend in the ammonia/flue gas mixer 240 flue gas and ammonia is mixed, and ammonia is sprayed in ammonia/flue gas mixer 240 by nozzle after through mass flowmeter 220 Control Flow and fully mixes with flue gas, with the mixing uniformity of assurance ammonia and flue gas.Ammonia is reduced into nitrogen with the oxides of nitrogen in the flue gas as reductive agent under the effect of catalyzer.
As shown in Figure 4; Catalytic reactor device 300 is made up of 3 catalytic reaction unit that are in series, and simulating the catalyzer number of plies in the SCR system of actual power station, is complementary with the catalyzer number of plies of actual power plant; The catalytic reaction unit comprises reaction tube 310, supports grid 320 and catalyst samples piece 330; Reaction tube 310 is a rectangular tube, supports grid 320 and is welded in the reaction tube, and be positioned at the lower end of reaction tube; Catalyst samples piece 330 can adopt honeycomb fashion, board-like or corrugated plate dst structure; Catalyst samples piece 330 supports are supporting on the grid 320, between the adjacent reaction tube through flange 340 connections and sealing, with reaction that the reaction tube 310 of the superiors is connected before pressure transducer 350 and temperature sensor 360 are installed on the trunk line 170; On every layer of reaction tube 310 temperature sensor 360 is installed all; With flue gas efferent duct 370 that undermost reaction tube 310 is connected on pressure transducer 350 is installed, pressure transducer 350 falls in order to the pressure of test flue gas through catalyzer, temperature sensor 360 is in order to confirm the homogeneity of temperature of reaction.
Following reaction has taken place in catalytic reactor device:
4NH
3+4NO+O
2→4N
2+6H
2O
2SO
2+O
2→2SO
3
As shown in Figure 5; Temperature control equipment 400 comprises heating cabinet and temperature conditioning unit, and catalytic reactor device is positioned at this heating cabinet, and temperature conditioning unit links to each other with heating cabinet 410; The work of control heating cabinet; Heating cabinet 410 is the electrical heating case, and heating cabinet coats one deck heat-preservation cotton 420 outward, and temperature conditioning unit comprises thermopair 430, temperature-time regulator 440, electric heater 450 and pulpit 460; Trunk line 170, catalytic reactor device 300 and flue gas efferent duct 370 are installed in the heating cabinet 410 before the mixer 160 of this evaluation system, ammonia nozzle 230, ammonia/flue gas mixer 240, the reaction, can both keep uniform and stable temperature to guarantee flue gas and course of reaction.
As shown in Figure 6, flue gas analysis device 500 comprises SO before the reaction
2With NO analytic unit and SO
3Analytic unit, SO
2With the NO analytic unit be flue gas analyzer 511, SO
3Analytic unit comprises sample bypass 510, valve 520, condenser pipe 530, condensate bottle 540, circulator bath 550 and the sampling pump 560 that links to each other successively; Pass through between the trunk line 170 before flue gas analyzer 511 and the reaction to be communicated with the sample bypass 510 and the SO of flue gas analyzer 511 with sample bypass 510 and valve 520
3The sample bypass 510 of analytic unit is communicated with SO with the preceding trunk line 170 of reaction respectively
2Be used for flue gas NO before the test reaction, SO with the NO analytic unit
2, O
2Deng smoke components content, SO
3Analytic unit is used for the preceding flue gas SO of analytical reactions
3Content.
As shown in Figure 7, reaction back flue gas analysis device 600 comprises SO
2With NO analytic unit, ammonia analytic unit and SO
3Analytic unit, SO
2Be used for flue gas NO behind the test reaction, SO with the NO analytic unit
2, O
2Deng smoke components content, SO
2Comprise condenser 680, gas-liquid separator 690 and the flue gas analyzer 611 that links to each other successively with the NO analytic unit, the ammonia analytic unit comprises sample bypass 610, valve 620, absorption bottle 670 and the sampling pump 660 that links to each other successively, is used to detect the escaping of ammonia, SO
3Analytic unit comprises sample bypass 610, valve 620, condenser pipe 630, condensate bottle 640, circulator bath 660 and the sampling pump 660 that links to each other successively, is used to test SO
2/ SO
3Conversion ratio, the sample bypass 610 and the SO of condenser 680, ammonia analytic unit
3The sample bypass 610 of analytic unit is communicated with the flue gas efferent duct 370 of catalytic reactor device 300 respectively.
As the conversion of present embodiment, the catalytic reactor device in this evaluation system also can be made up of 1～3 catalytic reaction unit that is in series, to simulate the catalyzer number of plies in the SCR system of actual power station.
As stated, utilize the evaluation system of the utility model, can test SO easily
2/ SO
3Conversion ratio, NH
3Escape, denitration efficiency and pressure fall, and have compact conformation, and it is stable that the integrated testability temperature keeps, and can simulate actual power plant operating mode and adopt multi-layer catalyst to arrange, short, low cost and other advantages of test duration.Wherein, SO
2/ SO
3The concrete computing formula of conversion ratio, denitration efficiency is following:
SO
2/ SO
3The conversion ratio computing formula is:
The denitration efficiency computing formula is:
is expressed as the concentration that reactor is imported and exported NO respectively in the formula, and unit is ppm.
The ammonia outlet concentration that NH3 escapes and obtains through test.
Claims (9)
1. evaluation system that is used to test SCR denitrating catalyst performance; It is characterized in that: this evaluation system comprises simulated flue gas generating means, ammonia gas generating device, catalytic reactor device, temperature control equipment, the preceding flue gas analysis device of reaction and reaction back flue gas analysis device; Described simulated flue gas generating means is simulated the flue gas that actual boiler produces; Described simulated flue gas generating means links to each other with catalytic reactor device; The pipeline that both link to each other is the preceding trunk line of reaction; Flue gas analysis device and ammonia gas generating device all are communicated with the preceding trunk line of said reaction before the said reaction; Before the reaction before flue gas analysis device and the reaction trunk line junction be positioned at before ammonia gas generating device and the reaction before the trunk line junction, said catalytic reactor device is carried out the SCR reaction to the flue gas that gets into, said temperature control equipment ring encloses trunk line and catalytic reactor device before the described reaction; Temperature with control simulated flue gas temperature and catalytic reactor device; The flue gas efferent duct of catalytic reactor device links to each other with said reaction back flue gas analysis device, and the flue gas after the catalytic reaction gets into reaction back flue gas analysis device and carries out flue gas analysis behind the flue gas efferent duct, contrasts the test and assess denitration performance of catalyzer of the Gas Parameters of reacting forward and backward flue gas analysis measurement device through analyzing.
2. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 1; It is characterized in that: described simulated flue gas generating means comprises source of the gas generating unit, water vapour generating unit and mixer; Described source of the gas generating unit comprises continuous source of the gas generator and mass flowmeter, and described water vapour generating unit comprises the H that links to each other successively
2O storage tank, volume pump and carburetor, described mass flowmeter is connected with mixer respectively with carburetor, and described mixer is communicated with the preceding trunk line of said reaction.
3. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 1; It is characterized in that: described ammonia gas generating device comprises ammonia source, mass flowmeter and the ammonia nozzle that links to each other successively; Trunk line is provided with ammonia/flue gas mixer before the said reaction, and described ammonia nozzle extend in said ammonia/flue gas mixer.
4. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 1; It is characterized in that: described catalytic reactor device is made up of 1～3 catalytic reaction unit that is in series; To simulate the catalyzer number of plies in the SCR system of actual power station; Described catalytic reaction unit comprises reaction tube, supports grid and catalyst samples piece, and described support grid is welded in the reaction tube, and is positioned at the lower end of reaction tube; Catalyst samples piece support connects through flange between the adjacent reaction tube supporting on the grid.
5. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 4 is characterized in that: described reaction tube is a rectangular tube, and said catalyst samples piece is honeycomb fashion, board-like or corrugated plate dst structure.
6. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 1; It is characterized in that: described temperature control equipment comprises heating cabinet and temperature conditioning unit; Trunk line and catalytic reactor device are positioned at this heating cabinet before the said reaction; Said temperature conditioning unit links to each other with heating cabinet, the work of control heating cabinet.
7. the evaluation system that is used to test SCR denitrating catalyst performance according to claim 6 is characterized in that: said heating cabinet is the electrical heating case, and said heating cabinet coats one deck heat-preservation cotton outward.
8. according to each described evaluation system that is used to test SCR denitrating catalyst performance of claim 1 to 7, it is characterized in that: the flue gas analysis device comprises SO before the said reaction
2With NO analytic unit and SO
3Analytic unit, described SO
2With the NO analytic unit be flue gas analyzer, described SO
3Analytic unit comprises successively sample bypass, valve, condenser pipe, condensate bottle, circulator bath and the sampling pump that links to each other, described flue gas analyzer and sample bypass respectively with said reaction before trunk line be communicated with.
9. according to each described evaluation system that is used to test SCR denitrating catalyst performance of claim 1 to 7, it is characterized in that: said reaction back flue gas analysis device comprises SO
2With NO analytic unit, ammonia analytic unit and SO
3Analytic unit, described SO
2Comprise condenser, gas-liquid separator and the flue gas analyzer that links to each other successively with the NO analytic unit, described ammonia analytic unit comprises sample bypass, valve, absorption bottle and the sampling pump that links to each other successively, described SO
3Analytic unit comprises sample bypass, valve, condenser pipe, condensate bottle, circulator bath and the sampling pump that links to each other successively, the sample bypass and the SO of described condenser, ammonia analytic unit
3The sample bypass of analytic unit is communicated with the flue gas efferent duct of said catalytic reactor device respectively.
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