CN207440029U - Denitrating catalyst device for evaluating performance - Google Patents
Denitrating catalyst device for evaluating performance Download PDFInfo
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- CN207440029U CN207440029U CN201721219600.2U CN201721219600U CN207440029U CN 207440029 U CN207440029 U CN 207440029U CN 201721219600 U CN201721219600 U CN 201721219600U CN 207440029 U CN207440029 U CN 207440029U
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Abstract
The utility model discloses a kind of denitrating catalyst device for evaluating performance, device includes：Air distribution system, reaction system plus dirt system, analysis system, step cooling system, cooling separation, exhaust treatment system.Described plus dirt system is connected to by pipeline on the pipeline between air distribution system and reaction system；Step cooling system is connected to by pipeline on the pipeline between reaction system and cooling separation.Utilize the utility model denitrating catalyst device for evaluating performance, dustless flue gas and the influence containing inert dust, flue gas containing heavy metal dusts to catalyst performance can be contrasted, and then more can operating status of the accurate evaluation catalyst under real working condition, so as to being targetedly improved to catalyst performance.Denitration reaction ammonium salt crystallization situation can be also investigated simultaneously, optimize device operating condition.
Description
Technical field
The utility model is related to denitrating catalyst device for evaluating performance, and in particular to a kind of different really flue gas operating modes of simulation
Condition carries out monoblock type denitrating catalyst in the device of performance evaluation.
Background technology
Nitrogen oxides is one of main atmosphere pollution, and emission request is increasingly strict.China《" 12th Five-Year Plan " energy-saving and emission-reduction
Comprehensive programme of work》Middle regulation：By 2015, national discharged nitrous oxides total amount declined 10% than 2010.2015 4
Month, what State Ministry of Environmental Protection promulgated《Petroleum refining industry pollutant emission standard》It is required that：From 1 day July in 2014, newly-built catalysis is split
Makeup puts nitrogen oxides requirement in discharge regenerated flue gas and is less than 200mg/m3, special emission limit requirement is less than 100mg/m3, 2017
On July 1, in, existing enterprise also performed the standard.
Selective catalytic reduction (Selective Catalytic Reduction, SCR) technology maturation, denitration efficiency
80%~90% is can reach, is widely used to power plant's denitration, core is catalyst.SCR reactors use wide at present
Be high-temperature high dust arrangement, i.e., catalytic reactor is arranged between boiler economizer and air preheater.Due to entering reactor
Flue-gas temperature is in the range of 300-400 DEG C, be disclosure satisfy that the running temperature requirement of most catalyst, is answered and this arrangement
It is widely adopted.But since catalyst is worked under sordid flue gas environment, service life can be affected.Fly
Contain the ingredients such as Na, K, Ca, As in ash so that catalyst is contaminated, so as to reduce the efficiency of catalyst；Flying dust is to catalyst
Generate abrasion；Flying dust may blocking catalyst passage；If flue-gas temperature raise, may by sintering of catalyst or recrystallization and
Failure etc..In addition, the side reaction as SCR techniques, sub-fraction SO is always had in flue gas2SO is oxidized to by catalyst3。SO3With
The ammonia reaction of escape, forms ammonium hydrogen sulfate and ammonium sulfate, these substances is condensed and deposited from flue gas, can not only make catalyst
Inactivation can also cause upstream device (economizer) salt crust of SCR system to block and corrode, increase pressure drop and the reduction of waste heat boiler
Its heat transfer property influences the normal operation of entire boiler.The patent of current existing denitrating catalyst evaluating apparatus is such as
CN201410319064, CN201320543659, CN201420527796 etc., can only gas with various component pair in simulated flue gas
The influence of catalyst performance can not investigate influence of the dust to catalyst performance in flue gas.
Utility model content
The main purpose of the utility model is to provide a kind of evaluating apparatus of catalyst for denitrating flue gas, can add in flue gas
Enter to influence the exhaust gas dust of catalyst activity, simulate actual flue gas condition, catalyst is evaluated, filters out high denitration efficiency
Catalyst formulation, while can also investigate denitration reaction ammonium salt crystallization situation, optimize the production technology of catalyst and using operation
Condition.
Denitrating catalyst device for evaluating performance described in the utility model, successively including air distribution system 1, reaction system 2, point
Analysis system 4, cooling separation 6 and exhaust treatment system 7；The air distribution system is connected by pipeline with reaction system, reaction
Thief hatch is set on system inlet/outlet pipeline, and the thief hatch is connected by pipeline with analysis system 4, after reaction system reaction
Gas is connected by pipeline with cooling separation, and cooling separation is connected by pipeline with exhaust treatment system；Its feature
In described device further include one for into reaction system add exhaust gas dust plus dirt system 3 and a step cooling system
System 5.
Described plus dirt system is connected to by pipeline on the pipeline between air distribution system and reaction system；The step cooling
System is arranged in the connecting pipeline between reaction system and cooling separation.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein described plus dirt system 3 is by feed bin 31, rotation spiral shell
Bar 32, feed pipe 33 and Venturi tube 34 form；Feed bin is arranged at one end of rotary screw, the other end of rotary screw by into
Expects pipe is connected with 34 throat of Venturi tube, and the Venturi tube is installed on the pipeline between air distribution system and reaction system.
The one side of the feed bin 31 is equipped with the observation window that can observe internal dust charge level.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein the step cooling system 5 is by sectional type
Heat-exchanger rig 51 forms, and heat-exchanger rig is connected by pipeline with reaction system and cooling separation.Desalted water passes through extension tube attached
Line is connected with heat-exchanger rig, can flue gas be cooled to 140~280 DEG C, wherein cigarette from temperature step when leaving catalytic reaction
Gas enters subsequent technique after carrying out close contact with heat exchanging pipe.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein the air distribution system 1 includes dispatching group respectively
Divide gas O2、SO2、NOx、N2With five gas distribution pipelines, a water distribution pipeline and a vaporizer of ammonia；The O2、SO2, NOx and
N2Gas distribution pipeline and water distribution pipeline are connected with vaporizer bottom, and vaporizer top exit passes through pipeline and ammonia dispensing line
It is connected, and is connected together with reaction system.
The vaporizer 17 is made of the mixing section of lower part vaporization section and top, H2O is vaporized in vaporization section, other gases
Design temperature is heated in vaporization section, is further risen into reactor 21 after then being mixed in mixing section.
Filter, pressure reducing valve, mass flow controller and check valve are set gradually on the gas distribution pipeline respectively so that
Component gas control addition by pressure reducing valve 12 after the filtering of filter 11 by mass flow controller 13 successively.
Reactor 21 described in the utility model is fixed bed reactors.Gas access is set on the upside of reactor, flue gas by
It is reacted under above through catalyst bed.Sampled point is respectively provided on the reactor inlet pipeline and outlet line.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein the analysis system 4 include sampling clack box,
Multi-byte samples valve and in-line analyzer, for analyzing NOx, SO in flue gas2、O2、CO2Etc. components concentration.It is furnished in the clack box
Heating unit and thermocouple carry out temperature control, ensure the flue-gas temperature of sampling.Sampling clack box and the reactor inlet pipeline and go out
The sampled point set on mouth pipeline is connected by pipeline.The sample of acquisition enters in-line analyzer by sampling valve and is divided
Analysis.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein the cooling separation includes washing successively
Gas tank 61, cooler 62 and knockout drum 63, scrubber tower 61 is interior equipped with cleaning solution, can separate the dust in flue gas.
It after the flue gas come out from reactor bottom enters the washing of scrubber tower 61, is cooled down into gas through cooler 62, gas is entered after cooling
Liquid knockout drum 63 carries out gas-liquid separation.The hydropexis being condensed in reaction product can be released periodically in knockout drum 63.Point
From setting a counterbalance valve 64, adjustable systems pressure on tank outlet line.
The evaluating apparatus of denitrating catalyst described in the utility model, wherein the exhaust treatment system 7 includes two-stage
Tail gas absorption bottle 71, built-in absorbing liquid, harmful constituent can be efficiently absorbed in gas, prevent the direct exhaust emission of gas after reaction
Environment.
Description of the drawings
Fig. 1 is the evaluating apparatus schematic diagram of denitrating catalyst described in the utility model.
Wherein reference numeral is：1- air distribution systems；2- reaction systems；3- adds dirt system；4- analysis systems；5- steps cool down
System；6- cooling separations；7- exhaust treatment systems；11- filters；12- pressure reducing valves；13- mass flowmenters；14- is unidirectional
Valve；15- stock bottles；16- metering pumps；17- vaporizers；21- reactors；22- sample frame baskets；31- feed bins；32- rotary screws；
33- feed pipes；34- venturi mixers；41- clack boxes；42- multi-byte samples valves；43- in-line analyzers；51- segmenteds heat exchange dress
It puts；61- scrubber towers；62- coolers；63- knockout drums；64- counterbalance valves；71- tail gas absorption bottles.
Specific embodiment
The utility model is further described in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, denitrating catalyst device for evaluating performance described in the utility model includes air distribution system 1, reaction system
System 2, analysis system 4, cooling separation 6, exhaust treatment system 7；The air distribution system is connected by pipeline with reaction system,
Reaction system inlet and outlet set thief hatch to be connected by pipeline with analysis system 4, pass through pipeline and refrigerated separation in reaction system
System 6 connects, and cooling system is connected by pipeline with exhaust treatment system 7；It is characterized in that described device further includes a use
In adding exhaust gas dust into reaction system plus dirt system 3 and one for simulating the step cooling system of heat exchanger salt crust situation
System 5, described plus dirt system are connected to by pipeline on the pipeline between air distribution system and reaction system；Step cooling system passes through
In pipeline connection and the pipeline between reaction system and cooling separation.
The course of work of denitrating catalyst device for evaluating performance described in the utility model as shown in Figure 1 is as follows：Component
Gas NOx, SO2、O2、N2Gas passes through respective pneumatic filter 11, pressure reducing valve 12, mass flowmenter 13 and check valve 14 respectively
Into vaporizer bottom vaporization section, pure water is pumped into from stock bottle 15 by metering pump 16 by technological requirement amount, is entered by pipeline
Vaporizer bottom vaporization section, NOx, the SO come out from vaporization section2、O2、N2Gas and vapor enter the mixing of vaporizer mixing section
Afterwards, with NH3The NH of pipeline supplying3The Venturi tube added in dirt system is mixed into, adds 3 dust from feed bin 31 in dirt system
Add in experiment aequum through rotary screw 32 after balance measures, by feed pipe 33 and venturi mixer 34 into gas circuit with
Flue gas mixes before reactor 21 is entered, and forms ash-laden gas together into reactor top, is urged by what is loaded in reactor
Agent is flowed out from reactor outlet.Gas after reaction enters step cooling system 5, after segmented formula heat-exchanger rig 51 exchanges heat
Into cooling separation 6, the dust in flue gas is separated through scrubber tower 61, the gas separated is cold through cooler 62
But gas-liquid separation is carried out into knockout drum 63 afterwards.The hydropexis being condensed in reaction product, can in knockout drum 63
Timing is released.Gas phase in knockout drum 63 enters exhaust treatment system 7 through counterbalance valve 64.Using two-stage tail gas absorption bottle 71 by gas
Harmful constituent is discharged into air after effectively absorbing in body, avoids polluting.
The gaseous sample that the sampled point acquisition set on gas line is imported and exported from reactor 21 connects entrance by pipeline
Analysis system 4 through the clack box 41 with heating unit, is switched over by multi-byte samples valve 42, carried out into in-line analyzer 43
Analysis.Sampling valve 42 can realize that multi-point sampler shares a set of analyzer；Heating unit in clack box can be both prevented in gas
Hydrogenesis also prevents NH3And SO2Reaction generation ammonium salt crystallization blocking pipeline.
Embodiment 1
Choose industrial Faveolate denitration catalyst product, size is 30 × 30 × 200mm, 4 × 4 holes, and entrance NOx is dense
It spends for 616.2mg/m3, SO2Concentration is 1028mg/m3, dust concentration 386mg/m3(dust is inert substance), O2Volume fraction
3.1%, moisture volume fraction 10%, air speed 4000h-1, 350 DEG C of reaction temperature, temperature measuring point temperature difference does not surpass above and below reactor
Start to measure after when crossing 3 DEG C and small device balance 200.It is 87.6mg/m that adjustment ammonia spraying amount, which controls reactor outlet NOx concentration,3,
NOx removal rates are 85.8%, and the escaping of ammonia is 0.6 μ L/L.It is observed that it is less than 230 DEG C of heat exchange in flue gas step cooling system
A thin layer of white salt efflorescence is tied on pipeline.
Embodiment 2
The catalyst and evaluation condition of use are unique the difference is that the dust added in is existed by infusion process with embodiment 1
Loaded on inert dust 0.8% arsenic oxide device balance 200 it is small when after start to measure.Adjust ammonia spraying amount control reactor
Exit NOx concentration is 89.3mg/m3, NOx removal rates are 85.5%, and the escaping of ammonia is 1.4 μ L/L.It is it is observed that cold in flue gas step
But it is less than the light gray salt efflorescence of one layer of knot on 220 DEG C of heat exchanging pipe in system.
Comparative example 1
The catalyst and evaluation condition of use are unique the difference is that the dust being added without in gas, device are put down with embodiment 1
Weigh 200 it is small when after start to measure.It is 85.6mg/m that adjustment ammonia spraying amount, which controls reactor outlet NOx concentration,3, NOx removal rates are
86.1%, the escaping of ammonia is 0.3 μ L/L.
It is found by embodiment and comparative example：Using the utility model denitrating catalyst evaluating apparatus, can contrast dustless
Flue gas and the influence containing inert dust, flue gas containing heavy metal dusts to catalyst performance, so more can accurate evaluation catalyst exist
Operating status under real working condition, so as to be targetedly improved to catalyst performance.It can also pass through flue gas step simultaneously
Cooling system evaluates and tests ammonium salt crystallization state of the flue gas after reaction on heat exchanging pipe.
Claims (10)
1. denitrating catalyst device for evaluating performance, successively including air distribution system, reaction system, analysis system, cooling separation
And exhaust treatment system；The air distribution system is connected by pipeline with reaction system, and the reaction system inlet and outlet set sampling
Mouthful, the thief hatch is connected by pipeline with the analysis system, the reaction system react after gas by pipeline with it is cold
But system connects, and the cooling separation is connected by pipeline with the exhaust treatment system；It is characterized in that, described device
Further include one for into reaction system add exhaust gas dust plus dirt system and a step cooling system；Described plus dirt system
System is connected to by pipeline on the pipeline between the air distribution system and the reaction system；The step cooling system is arranged at
In connecting pipeline between the reaction system and the cooling separation.
2. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that described plus dirt system by feed bin,
Rotary screw, feed pipe and Venturi tube composition；The feed bin is arranged at one end of the rotary screw, the rotary screw
The other end is connected by feed pipe with the venturi throat, the Venturi tube be installed on the air distribution system with it is described
On pipeline between reaction system.
3. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that the step cooling system is by dividing
Segmentation heat-exchanger rig forms.
4. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that the air distribution system includes difference
Dispense component gas O2、SO2、NOx、N2With five gas distribution pipelines, a water distribution pipeline and a vaporizer of ammonia；The distribution
Pipeline and the water distribution pipeline are connected with vaporizer bottom, and vaporizer top exit passes through pipeline and ammonia dispensing line phase
Even, and it is connected together with the reaction system.
5. denitrating catalyst device for evaluating performance as claimed in claim 4, which is characterized in that the vaporizer is vaporized by lower part
The mixing section on section and top forms.
6. denitrating catalyst device for evaluating performance as claimed in claim 4, which is characterized in that on the gas distribution pipeline respectively according to
Secondary setting filter, pressure reducing valve, mass flow controller and check valve.
7. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that it is anti-that the reaction system includes one
Device is answered, the reactor is fixed bed reactors, and gas access, the suction line of the reactor are set on the upside of the reactor
With sampled point is respectively provided on outlet line.
8. denitrating catalyst device for evaluating performance as claimed in claim 7, which is characterized in that the analysis system includes sampling
Clack box, multi-byte samples valve and in-line analyzer, the sampling clack box on the reactor inlet pipeline and outlet line with setting
Sampled point be connected by pipeline.
9. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that the cooling separation is successively
Including scrubber tower, cooler and knockout drum.
10. denitrating catalyst device for evaluating performance as described in claim 1, which is characterized in that the exhaust treatment system bag
Include two-stage tail gas absorption bottle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721219600.2U CN207440029U (en) | 2017-09-21 | 2017-09-21 | Denitrating catalyst device for evaluating performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721219600.2U CN207440029U (en) | 2017-09-21 | 2017-09-21 | Denitrating catalyst device for evaluating performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115469050A (en) * | 2022-07-22 | 2022-12-13 | 国能龙源催化剂江苏有限公司 | Test system and method for evaluating reaction performance of SCR (Selective catalytic reduction) catalyst |
| CN116754447A (en) * | 2023-08-10 | 2023-09-15 | 苏州西热节能环保技术有限公司 | Air preheater heat exchange ABS deposition simulation system and method along Cheng Yanqi |
-
2017
- 2017-09-21 CN CN201721219600.2U patent/CN207440029U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115469050A (en) * | 2022-07-22 | 2022-12-13 | 国能龙源催化剂江苏有限公司 | Test system and method for evaluating reaction performance of SCR (Selective catalytic reduction) catalyst |
| CN115469050B (en) * | 2022-07-22 | 2024-03-29 | 国能龙源催化剂江苏有限公司 | Test system and method for evaluating reaction performance of SCR catalyst |
| CN116754447A (en) * | 2023-08-10 | 2023-09-15 | 苏州西热节能环保技术有限公司 | Air preheater heat exchange ABS deposition simulation system and method along Cheng Yanqi |
| CN116754447B (en) * | 2023-08-10 | 2023-11-03 | 苏州西热节能环保技术有限公司 | Air preheater heat exchange ABS deposition simulation system and method along Cheng Yanqi |
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