CN106248865A - A kind of full-scale catalyst for denitrating flue gas operational characteristic experimental provision - Google Patents
A kind of full-scale catalyst for denitrating flue gas operational characteristic experimental provision Download PDFInfo
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- CN106248865A CN106248865A CN201610818753.2A CN201610818753A CN106248865A CN 106248865 A CN106248865 A CN 106248865A CN 201610818753 A CN201610818753 A CN 201610818753A CN 106248865 A CN106248865 A CN 106248865A
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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
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
The invention discloses a kind of full-scale catalyst for denitrating flue gas operational characteristic experimental provision, including two set detecting system and device for absorbing tail gas；Often set detecting system all includes smoke generating appts, gas mixer, coiled gas preheater, static ammonia mixing arrangement, nitrogen ammonia mixing source of the gas, reaction unit；Smoke generating appts enters static ammonia mixing arrangement through gas mixer, coiled gas preheater successively；Ammonia nitrogen mixing source of the gas is connected with static ammonia mixing arrangement；Static ammonia mixing arrangement is connected with reaction unit；Reaction unit is connected with device for absorbing tail gas respectively；Gas sample mouth it is equipped with at the exit and entrance of reaction unit；The outlet of the static ammonia mixing arrangement of two set detecting systems is connected by pipeline；The two ends of pipeline are connected with two reaction units overlapping detecting systems respectively；The outlet of the reaction unit of detecting system I is connected by the entrance of valve with the reaction unit of detecting system II.Experimental provision testing efficiency of the present invention is higher.
Description
Technical field
The present invention relates to a kind of experimental provision for measuring assessment catalyst for denitrating flue gas process performance index.
Background technology
Full-scale catalyst for denitrating flue gas operational characteristic experimental provision is a kind of for measuring assessment catalyst for denitrating flue gas
The experimental provision of process performance index.It is by the operating condition environment of simulated flue gas denitrating catalyst, measure analog cigarette
Gas is by the change of component before and after complete single-stage or multiple catalysts cell cube, to assess the denitration efficiency of test sample, work
Property, the escaping of ammonia, sulfur dioxide (SO2)/sulfur trioxide (SO3) the series of process performance indications such as conversion ratio.
In recent years China is increasingly strict for the Con trolling index of power plant emission nitrogen oxides, and SCR flue gas is taken off by Thermal Power Enterprises
Nitre system, especially as core component catalyst for denitrating flue gas quality surveillance and management work attention degree the most day by day
Strengthen.Power industry standard " coal steam-electric plant smoke denitrating catalyst inspection specifications " (the DL/T 1286-issued for 2013
2013) GB " honeycomb type flue gas denitration catalyst " (G II/T 31587-2015) carried out with the end of the year 2015 takes off for flue gas
The measuring method of denox catalyst operational characteristic index, judgment criteria and corresponding full-scale catalyst for denitrating flue gas technique are special
The explanation that property experimental provision flow process all gives.But do not make detailed experimental provision structural parameters and the performance indications of device itself
Requirement.
Owing to catalyst for denitrating flue gas simulation test operating mode is complicated and changeable, full-scale catalyst for denitrating flue gas operational characteristic is real
The quality of experiment device self performance and the accuracy of the adaptability meeting appreciable impact experimental result on measurement condition.The most domestic
In the full-scale catalyst for denitrating flue gas operational characteristic experimental provision that coherent detection mechanism is possessed, reactor part mostly uses
Horizontal arrangement form, easily causes the gravity in reactor due to gas temperature, density variation when simulated flue gas flows through reactor
Lamination, thus reduce velocity field and concentration of component field distribution uniformity, and the accuracy of testing result is produced impact.Its
Secondary, most experiments device for specific components single channel test supply use single gas flowmeter carry out flow regulation and
Controlling, attainable gas flow stability contorting scope is the narrowest, when each component in the simulated flue gas required by experiment
When concentration change scope is bigger, this kind of gas flow control mode is likely difficult to adapt to, thus limits the operating mode of experimental provision
The scope of application.3rd, the simple full-scale catalyst for denitrating flue gas operational characteristic experimental provision of form is typically difficult to realize simultaneously
Measurement condition of connecting multiple single-stage catalyst parallel connection tests and multiple catalysts is switched fast, thus testing efficiency is relatively low.
Summary of the invention
The invention aims to solve defect present in prior art, it is provided that a kind of testing efficiency is higher, can be same
The experimental provision that multiple single-stage catalyst parallel connection tests and multiple catalysts series connection measurement condition are switched fast by Shi Shixian.
In order to achieve the above object, the invention provides a kind of full-scale catalyst for denitrating flue gas operational characteristic experiment dress
Putting, this experimental provision includes two set detecting systems: detecting system I and detecting system II, and device for absorbing tail gas；Detecting system
I and detecting system II all include smoke generating appts, gas mixer, coiled gas preheater, static ammonia mixing arrangement,
Ammonia nitrogen mixing source of the gas, reaction unit；Smoke generating appts enters static state through gas mixer, coiled gas preheater successively
Ammonia mixing arrangement；Nitrogen ammonia mixing source of the gas is connected with static ammonia mixing arrangement；Static ammonia mixing arrangement is connected with reaction unit；Detection
System I is connected with device for absorbing tail gas respectively with the reaction unit of detecting system II；Reaction unit includes at least two-stage reactor；
It is equipped with gas sample mouth at the exit and entrance of every stage reactor；The static ammonia mixing dress of detecting system I and detecting system II
The outlet put is connected by pipeline；The two ends of pipeline reaction unit with detecting system I and detecting system II respectively is connected；Quiet
Between state ammonia mixing arrangement and pipeline, between static ammonia mixing arrangement and reaction unit, on pipeline, it is equipped with valve；Detecting system
The outlet of the reaction unit of I is connected by the entrance of valve with the reaction unit of detecting system II.
Wherein, reaction unit includes two-stage reactor, and two-stage reactor is connected, the entrance of front reaction device, two-stage reaction
Between device, rear end reactor exit be equipped with above-mentioned gas sample tap.
Smoke generating appts includes that nitric oxide source of the gas, sulfur dioxide source of the gas, air source of the gas, Nitrogen source gases, steam are sent out
The sulfur dioxide gas flow control that the different nitric oxide gas flow controller of generating apparatus, two ranges, two ranges are different
The nitrogen gas flow controller that the different air gas flow controller of device processed, two ranges, two ranges are different；Steam
Generating means is connected with gas mixer；Nitric oxide source of the gas two nitric oxide flow controllers, dioxies in parallel
Change sulfur source of the gas two sulfur dioxide gas flow controllers in parallel, air source of the gas two air gas streams in parallel
Amount controller, Nitrogen source gases two nitrogen gas flow controllers in parallel are connected with gas mixer respectively.
Detecting system also includes gas-to-gas heat exchanger；Reaction unit is connected with device for absorbing tail gas by gas-to-gas heat exchanger；
Nitrogen source gases passes sequentially through two nitrogen gas flow controllers in parallel, gas-to-gas heat exchangers and is connected with gas mixer.
Detecting system also includes two ammonia nitrogen mixed gas flow controllers；Ammonia nitrogen mixing source of the gas two ammonia in parallel
Nitrogen mixture gas flow controller is connected with static ammonia mixing arrangement.
Reactor uses vertical reactor.
The gas sample mouth often overlapping detecting system is all connected with a set of online flue gas analyzer.
The present invention has the advantage that compared to existing technology
One, the present invention uses the detecting system that two sets are arranged side by side, is provided with two-stage reactor in every group system in a series arrangement.Two groups
The switching by pipe valve of four reactors in detecting system, can realize single most level Four catalyst for denitrating flue gas sample
Experiment test；It also is able to realize two groups of experiment parallel tests of most two-stage catalyst for denitrating flue gas sample.Adapting to complexity
Testing efficiency is improve while experiment condition.
Two, experimental provision reactor part use vertical form, can effectively optimize the flow field in reactor and
Gas concentration Field distribution characteristic, it is ensured that it is equal that simulated flue gas met flow field and gas concentration field before entering test catalyst sample
The requirement of even property.
Three, the distribution part (i.e. smoke generating appts part) of experimental provision, uses arranged side by side two pieces for single channel gas
Flow controller co-controlling.The range of two pieces of gas flowmeters is different, can be according to the change simulating flue gas composition in experiment condition
Change switches over, and uses control mode alone or in combination, it is achieved suitable to the flue gas composition concentration change experiment condition of wide scope
Should be with accurately regulation and control.
Four, the present invention passes through gas-gas heat exchanger, the waste heat of efficient utilization device tail gas can carry out heated inlet flue gas, reduce
Plant running energy consumption.
Five, experimental provision of the present invention can carry out the test of full-scale catalyst for denitrating flue gas operational characteristic, and detection mode meets
GB (GB/T 31587-2015) and power industry standard (DL/T 1286-2013) requirement, compare general small-sized detection device
Testing result has more representativeness.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention full-scale catalyst for denitrating flue gas operational characteristic experimental provision.
In figure, I, II-detecting system, a-ammonia nitrogen mixing source of the gas, b-nitric oxide source of the gas, c-sulfur dioxide source of the gas, d-is empty
Gas source of the gas, e-Nitrogen source gases, f-industry softens water water source, 1-1,1-2,1-11,1-12-ammonia nitrogen gaseous mixture gas flow-control
Device, 1-3,1-4,1-13,1-14-nitric oxide gas flow controller, 1-5,1-6,1-15,1-16-sulfur dioxide gas stream
Amount controller, 1-7,1-8,1-17,1-18-air gas flow controller, 1-9,1-10,1-19,1-20-nitrogen gas flow
Controller, 2-1,2-2-water vapor generation device, 3-1,3-2-gas mixer, 4-1,4-2-coiled gas preheater,
5-1,5-2-static ammonia mixing arrangement, 6-1,6-2,6-3,6-4-reactor, 7-1,7-2-gas-to-gas heat exchanger, 8-tail gas absorption
Device, A-1, A-2, A-3, B-1, B-2, B-3-gas sample mouth, the online flue gas analyzer of 9-1,9-2-.
Detailed description of the invention
The present invention is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, the vertical series/parallel of the level Four full-scale catalyst for denitrating flue gas operational characteristic experiment that the present invention provides
Device is made up of two groups of detecting systems I arranged side by side, II, and the design maximum exhaust gas volumn often organizing detecting system is 200Nm3/ h is the highest
Design reaction temperature is 500 DEG C.Often group detecting system comprise a series of air supply source (include Nitrogen source gases e, air source of the gas d, one
Nitrogen oxide source of the gas b, sulfur dioxide source of the gas c, ammonia nitrogen mixing source of the gas a) and watering (industry de-mineralized water source f), wherein Nitrogen source gases e
Supplied with air compressor by nitrogen making machine respectively with air source of the gas d；Other gas source is supplied by steel cylinder gas.Each road gas divides
The most supporting gas flow controller, to regulate flow and the proportioning of gas with various.
Two pieces of flow controllers (different range) that each road gas configuration is arranged side by side: in Group I detecting system, 1-1,1-2 are
Ammonia nitrogen mixed gas flow controller；1-3,1-4 are nitric oxide gas flow controller；1-5,1-6 are sulfur dioxide gas
Flow controller；1-7,1-8 are air gas flow controller；1-9,1-10 are nitrogen gas flow controller.Group II is examined
In examining system, 1-11,1-12 are ammonia nitrogen mixed gas flow controller；1-13,1-14 are nitric oxide gas flow controller；
1-15,1-16 are sulfur dioxide gas flow controller；1-17,1-18 are air gas flow controller；1-19,1-20 are nitrogen
Gas gas flow controller.
Watering is that two groups of industry de-mineralized water source f connect with corresponding water vapor generation device 2-1,2-2, produces controllable flow
The steam of amount, respectively two groups detecting systems provide steam, to meet the component requirements of simulated flue gas.
Often in group detecting system, nitrogen is first passed through in each self-corresponding gas-gas heat exchanger 7-1,7-2, by experiment tail gas one
Conflux with air, nitric oxide, sulfur dioxide, steam again after secondary heating, and enter in gas mixer 3-1,3-2 abundant
Mixing forms simulated flue gas, is passed through afterwards in coiled gas preheater 4-1,4-2 and carries out post bake, makes flue-gas temperature reach
Experiment condition requirement.The most again ammonia nitrogen gaseous mixture (denitrification reducing agent) is passed through in simulated flue gas, and flows through static ammonia mixing dress
Put in 5-1,5-2 and fully mix, pass sequentially through the first order and (the Group I inspection of second level reactor of corresponding group detecting system subsequently
First and second stage reactor of examining system is 6-1,6-2；First and second stage reactor of Group II detecting system is 6-3,6-4).
Catalyst for denitrating flue gas sample is placed in reactor, and the structure of two groups of detecting system totally four reactors is identical, instead
Answering device inside dimension is 155mm × 155mm × 1400mm, and every A reactor can accommodate a catalyst for denitrating flue gas unit
Body.The simulated flue gas being mixed into ammonia nitrogen gaseous mixture first passes through rectification at reactor inlet, after meeting certain Flow Field Distribution requirement,
Pass through catalyst for denitrating flue gas sample, and SCR(SCR occur) denitration reaction.In every first order reaction
Be equipped with at the entrance and exit of device gas sample mouth (the gas sample mouth of Group I detecting system from front to back be respectively A-1,
A-2、A-3；The gas sample mouth of Group II detecting system is respectively B-1, B-2, B-3 from front to back).By gas sample mouth
Partial fume can be extracted be passed through in online flue gas analyzer, measure the content of the most each flue gas composition, be thus calculated cigarette
The series of process such as the denitration efficiency of QI prostration denox catalyst sample, activity, the escaping of ammonia, sulfur dioxide/sulphur trioxide conversion rate
Can index.The often corresponding a set of online flue gas analyzer of group detecting system, respectively 9-1,9-2.
Reacted simulated flue gas passes through gas-gas heat exchanger 7-1,7-2, with upstream nitrogen generation heat exchange, makes self simultaneously
After flue-gas temperature reduces, enter back in device for absorbing tail gas 8.Harmful constituent (such as sulfur dioxide, nitrogen oxides etc.) in flue gas
After being removed in device for absorbing tail gas, experiment tail gas is again in emptier enters ambient air.Two groups of detecting systems share
A set of device for absorbing tail gas.
Two groups of detecting systems are connected with valve by threeway, pipeline after respective static ammonia mixing arrangement, make each other
The devices such as the supply of front end, flow controller and coiled gas preheater can be the most standby.When single group detecting system occurs event
During barrier, valve transfer can be passed through, utilize another set of detecting system to provide simulated flue gas.
According to the requirement of experiment condition, the vertical series/parallel of described level Four full-scale catalyst for denitrating flue gas operational characteristic
Experimental provision can realize the experimental evaluation to one to level Four catalyst for denitrating flue gas sample.When tested catalyst for denitrating flue gas sample
When grade number is less than two grades, it is complete that the first order of available single group detecting system and second level reactor form two-stage series connection flow process
One-tenth test job, and it is capable of the parallel test of two groups of detecting systems, it does not interfere with each other to each other；When tested denitrating flue gas
Catalyst sample progression is three grades or during level Four, then need the second level reactor exit in Group I detecting system to manage
Road valve transfer, makes flue gas lead at the first order reactor inlet of Group II detecting system, thus by two groups of detecting systems
Fourth-order reaction device is collectively forming serial flow, to meet experiment condition requirement.
Claims (7)
1. a full-scale catalyst for denitrating flue gas operational characteristic experimental provision, it is characterised in that: described experimental provision includes two
Set detecting system: detecting system I and detecting system II, and device for absorbing tail gas；Described detecting system I and detecting system II are equal
Including smoke generating appts, gas mixer, coiled gas preheater, static ammonia mixing arrangement, ammonia nitrogen mixing source of the gas, anti-
Answer device；Described smoke generating appts enters the mixing of described static ammonia through gas mixer, coiled gas preheater successively
Device；Described nitrogen ammonia mixing source of the gas is connected with described static ammonia mixing arrangement；Described static ammonia mixing arrangement and described reaction dress
Put connected；Described detecting system I is connected with described device for absorbing tail gas respectively with the reaction unit of detecting system II；Described reaction
Device includes at least two-stage reactor；It is equipped with gas sample mouth at the exit and entrance of every stage reactor；Described detecting system I
Outlet with the static ammonia mixing arrangement of detecting system II is connected by pipeline；The two ends of described pipeline respectively with detecting system
I is connected with the reaction unit of detecting system II；Between described static ammonia mixing arrangement and pipeline, static ammonia mixing arrangement and reaction
Valve it is equipped with between device, on pipeline；The outlet of the reaction unit of described detecting system I is by valve and detecting system II
The entrance of reaction unit is connected.
Experimental provision the most according to claim 1, it is characterised in that: described reaction unit includes two-stage reactor, two-stage
Reactors in series, described gas sample mouth is respectively arranged between the entrance of front reaction device, two-stage reactor, rear end reactor goes out
At Kou.
Experimental provision the most according to claim 1, it is characterised in that: described smoke generating appts includes nitric oxide gas
The nitric oxide gas stream that source, sulfur dioxide source of the gas, air source of the gas, Nitrogen source gases, water vapor generation device, two ranges are different
The air gas flow-control that the different sulfur dioxide gas flow controller of amount controller, two ranges, two ranges are different
The nitrogen gas flow controller that device, two ranges are different；Described water vapor generation device is connected with described gas mixer；
Described nitric oxide source of the gas two nitric oxide flow controllers in parallel, sulfur dioxide source of the gas in parallel two two
Sulfur oxide gas flow controller, air source of the gas two air gas flow controllers in parallel, Nitrogen source gases are by also
Two nitrogen gas flow controllers of connection are connected with gas mixer respectively.
Experimental provision the most according to claim 3, it is characterised in that: described detecting system also includes gas-to-gas heat exchanger；Institute
State reaction unit to be connected with device for absorbing tail gas by gas-to-gas heat exchanger；Described Nitrogen source gases passes sequentially through two nitrogen of parallel connection
Gas gas flow controller, described gas-to-gas heat exchanger are connected with described gas mixer.
Experimental provision the most according to claim 1, it is characterised in that: described detecting system also includes that two ranges are different
Ammonia nitrogen mixed gas flow controller；Described ammonia nitrogen mixing source of the gas two ammonia nitrogen mixed gas flow controllers in parallel with
Described static ammonia mixing arrangement is connected.
Experimental provision the most according to claim 1, it is characterised in that: described reactor uses vertical reactor.
Experimental provision the most according to claim 1, it is characterised in that: often overlap the gas sample mouth of detecting system all with a set of
Online flue gas analyzer is connected.
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Cited By (5)
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| CN108195993A (en) * | 2018-01-18 | 2018-06-22 | 南京埃森环境技术股份有限公司 | A kind of SCR denitration full-scale performance detection evaluating apparatus and its application process |
| 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 |
| CN109324157A (en) * | 2018-11-15 | 2019-02-12 | 华电电力科学研究院有限公司 | Priming apparatus is used in a kind of simulated flue gas preparation method and simulated flue gas test |
| CN109387606A (en) * | 2018-11-27 | 2019-02-26 | 清华大学盐城环境工程技术研发中心 | A kind of SCR denitration full-scale performance evaluation system |
| CN109932472A (en) * | 2019-03-05 | 2019-06-25 | 华电电力科学研究院有限公司 | A kind of SCR denitration device for detecting performance and detection method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195993A (en) * | 2018-01-18 | 2018-06-22 | 南京埃森环境技术股份有限公司 | A kind of SCR denitration full-scale performance detection evaluating apparatus and its application process |
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| CN109324157A (en) * | 2018-11-15 | 2019-02-12 | 华电电力科学研究院有限公司 | Priming apparatus is used in a kind of simulated flue gas preparation method and simulated flue gas test |
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| CN109387606A (en) * | 2018-11-27 | 2019-02-26 | 清华大学盐城环境工程技术研发中心 | A kind of SCR denitration full-scale performance evaluation system |
| CN109932472A (en) * | 2019-03-05 | 2019-06-25 | 华电电力科学研究院有限公司 | A kind of SCR denitration device for detecting performance and detection method |
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Application publication date: 20161221 |