CN207722634U - A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system - Google Patents
A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system Download PDFInfo
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- CN207722634U CN207722634U CN201721660004.8U CN201721660004U CN207722634U CN 207722634 U CN207722634 U CN 207722634U CN 201721660004 U CN201721660004 U CN 201721660004U CN 207722634 U CN207722634 U CN 207722634U
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- flue gas
- flue
- sampling
- perforated distributor
- analyzer
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Abstract
The utility model is specifically related to a kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system, mainly solves the problems, such as apparatus of thermo-electric power boiler SCR denitration flue gas flow field irrational distribution.The utility model includes mainly mobile perforated distributor component, the online Flow speed measurer of high temperature resistant, catalyst layer entrance sampling gun, catalyst layer entrance gaging hole, probe tube electric shutting-door, sample main pipe, sampling pump, flue gas analyzer, ammonia density in-line analyzer, computer processing system etc., the utility model is according to flue gas flow rate, the data such as nitrous oxides concentration and escape ammonia density, it can be in the catalyst activity index of line computation different zones, and flue gas flow Dynamic Assignment is calculated automatically, then on-line tuning is carried out to flue gas flow field using mobile perforated distributor, amount of ammonia slip is reduced to the greatest extent, and balanced catalyst remaining life, reduce boiler catalyst maintenance cost.
Description
Technical field
The utility model belongs to large electric power plant boiler SCR denitration field, and in particular to a kind of apparatus of thermo-electric power boiler denitrating system
Flow fieldoptimization device.
Background technology
The SCR denitration system of China's thermoelectricity coal-burning boiler generally existing problems in actual moving process：Catalyst
It blocks and corrodes and block up grey, catalyst life is short, catalyst inactivation is different etc. with abrasion, air preheater.These problems are certain
Degree all has substantial connection with the plume field distribution of denitrating system：The high region of flue gas flow rate, catalyst live load are big so that
Catalyst abrasion and poisoning aging phenomenon ratio are more serious, and catalyst activity is caused to reduce, and then the region the escaping of ammonia increases, finally
Air preheater is caused to corrode and block up ash；Conversely, the lower region of flue gas flow rate, catalyst aging speed is slower, causes different zones
Catalyst activity difference it is larger, cause difficulty to the replacement and maintenance in later stage.Therefore, the catalyst of denitrating system is effectively adjusted
Layer flue gas flow field has very important significance.
Existing flue gas flow field adjustment technology mainly installs fixed deflector stream field in denitration flue and carries out leveling
Processing, this method are to adjust foundation, and actual conditions have certain deviation, are unable to ensure leveling flue gas with the result of numerical simulation
Flow field；Moreover, because the setting angle of fixed deflector is unable to adjust, even if causing to find flue gas stream in actual moving process
Field is unreasonable, can not but improve.
Further, flue gas flow field is not that all should be at leveling state under any operating mode, for example, being lost for catalyst
More serious region living, should reduce the flue gas flow rate in the region, to reduce amount of ammonia slip, but existing fixed deflector skill
Art cannot meet this requirement completely.
Utility model content
The purpose of this utility model is to solve the problems, such as large electric power plant boiler SCR denitration flue gas flow field irrational distribution, especially
In the case that it is catalyst inactivation difference, exhaust gas volumn distribution can be intelligently adjusted, reduces amount of ammonia slip to the greatest extent,
And leveling " catalyst expection remaining life ".The utility model provides that a kind of principle is advanced, simple in structure is used for apparatus of thermo-electric power boiler
The flow fieldoptimization device of denitrating system, the present apparatus can be in line computation catalyst activity indexes, according to " activity is high, then cigarette speed is high；It is living
Property it is low, then cigarette speed is low " principle, it is automatic to calculate flue gas load Dynamic Assignment, then use mobile perforated distributor group
Part carries out on-line tuning to flue gas flow field, reduces amount of ammonia slip to the greatest extent, enables to catalyst layer exit nitrogen oxygen
The nonunf ormity of compound concentration is less than 15%, and the nonunf ormity of ammonia slip concentration is less than 20%, and balanced catalysis
Agent remaining life reduces boiler catalyst maintenance cost.
The technical solution that the utility model solves above-mentioned technical problem is as follows：
A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system, including mobile perforated distributor component, multiple entrances
Sampling gun, multiple outlet sampling guns, sampling main pipe, Flue Gas Pretreatment Device, sampling pump, flue gas analyzer, computer disposal system
System, ammonia density in-line analyzer and the online Flow speed measurer of multiple high temperature resistants, the porous cloth of mobile perforated distributor component
Aerofoil is located in the inner cavity of Denitration in Boiler flue, and positioned at the top of flow straightening grid, and multiple entrance sampling guns pass through Denitration in Boiler
It walling of flue and stretches into Denitration in Boiler flue, and between flow straightening grid and catalyst layer, multiple outlet sampling guns and multiple
The online Flow speed measurer of high temperature resistant passes through Denitration in Boiler walling of flue and stretches into Denitration in Boiler flue, and positioned at catalyst layer
The outlet flue of lower section, multiple entrance sampling guns and multiple outlet sampling guns respectively by electric shutting-door with sampling main pipe into cigarette
The smoke inlet of mouth connection, the outlet flue and Flue Gas Pretreatment Device that sample main pipe connects, and the outlet flue of Flue Gas Pretreatment Device is logical
It crosses the pipeline equipped with sampling pump to connect with flue gas analyzer and ammonia density in-line analyzer respectively, flue gas analyzer, ammonia density exist
Line analysis instrument connects computer processing system with the online Flow speed measurer of multiple high temperature resistants, and computer processing system is used for basis
Flue gas analyzer, ammonia density in-line analyzer and the online Flow speed measurer feedack of multiple high temperature resistants are catalyzed in line computation
Agent activity index, it is automatic to calculate flue gas load Dynamic Assignment, in order to use mobile perforated distributor component to flue gas
Flow field carries out on-line tuning.
The advantageous effect of above-mentioned apparatus is：
(1) the utility model realizes the flue gas on-line continuous timing sampling of catalyst entrance different zones：Along catalysis
Oxidant layer width direction (i.e. flue width direction) is fitted with sampling gun in the entrance and exit of catalyst layer, can be to catalysis
The different zones of agent are all sampled；It is fitted with probe tube electric shutting-door in the outlet of every sampling gun, these motor-driven valves
Only in the open state there are one electrically operated gate in synchronization according to control logic, and all motor-driven valves are beaten successively in order
Open and close are closed, it is ensured that are individually sampled in turn to entire catalyst layer different zones；
(2) the utility model is realized is carried out at the same time flue gas composition analysis and ammonia density analysis to sampling flue gas：Sampling pump
Outlet conduit is divided into two parts, is respectively fed to flue gas analyzer and ammonia density analyzer carries out on-line analysis；
(3) the utility model realizes catalyst activity index on-line analysis using computer processing system：The first step, root
The flue gas flow rate and catalyst layer subregion sectional area obtained according to Flow speed measurer, calculates the flue gas flow Q in certain region1；Second
Step, the nitrous oxides concentration and flue gas flow Q of the region entrance flue gas are obtained according to flue gas analyzer1, the area is calculated
The nitrogen oxide mass Q of domain reaction removing2；Third walks, according to the ammonia for the region entrance flue gas that ammonia density analyzer obtains
Concentration and flue gas flow Q1, calculate the ammonia quality Q of region escape3；4th step finds out the region according to above-mentioned result of calculation
Catalyst activity index n=Q2/Q3；5th step finds out the catalyst activity index n of catalyst different zones with same procedure,
And it is depicted as table, it is shown in terminal；
(4) the utility model can assess catalyst remaining life：By the catalysis of the above-mentioned different zones found out
Agent activity index is compared with former raw catelyst activity index, in conjunction with hours of operation, estimates remaining hours of operation；
(5) the utility model can calculate flue gas load dynamic optimization allocation plan using computer processing system, place
It is " under the premise of discharged nitrous oxides are not exceeded, ammonia slip concentration is preferably minimized " to manage principle.For this purpose, formulating following processing
Method：The first step, according to the flue gas flow Q in each region1, find out total exhaust gas volumn Q1 is total；Second step, according to catalyst layer exit
The different feature of the nitrogen oxides exit concentrations of different zones, to amount of flue gas emission Q1 is totalCarry out linear scale just sub-distribution (exit
The concentration of nitrogen oxides is higher, and the flue gas flow of distribution is fewer)；Third walks, and according to first sub-distribution exhaust gas volumn allocation result, utilizes
The catalyst activity index in certain region, calculates the nitrous oxides concentration at the regional export；4th step, to different zones exit
Nitrous oxides concentration is compared data statistics, if nitrous oxides concentration standard deviation>15%, then adjust exhaust gas volumn allocation plan
(flue gas flow is reduced in standard deviation region bigger than normal, and standard deviation region less than normal increases exhaust gas volumn), until meeting the requirements；5th
Step, is checked using ammonia slip concentration at each regional export, if ammonia slip concentration standard deviation>20%, then use same procedure
Exhaust gas volumn is finely adjusted, until meeting the requirements, determines the best exhaust gas volumn of theory in each region；6th step, most according to theory
Good exhaust gas volumn, is converted into the best flue gas flow rate of theory of one's respective area, and is compared with practical flue gas flow rate, and it is bent to draw deviation
Line finally shows correlation calculation result in terminal.
(6) the utility model can utilize mobile perforated distributor component to realize flue gas flow on-line tuning：
According to the above-mentioned best flue gas flow rate of theory being calculated, using manually or electrically mode, along flue width direction, by porous cloth
Aerofoil is used in combination adjusting handle to change air distribution plate angle of inclination, reduces the circulation area in the region, reduce to the higher region of cigarette speed
The flue gas flow rate in the region.Meanwhile the flue gas in the region is directed at the relatively low region of other cigarette speed, realize on-line optimization cigarette
The target of airflow field.
Further, the mobile perforated distributor component includes adjusting handle, horizontal roller, arc horizontal slide rail, branch
Pedestal, perforated distributor, air distribution plate support shaft and seal assembly are supportted, the equally distributed resistance hole that disappears is equipped on perforated distributor,
Air distribution plate support shaft is located on perforated distributor, and an adjusting hand is separately installed with to interior from outer at the both ends of air distribution plate support shaft
Wheel, a horizontal roller and a seal assembly, horizontal roller are located in arc horizontal slide rail, and arc horizontal slide rail passes through support
Pedestal is supported fixation.
The advantageous effect of above-mentioned apparatus is：
(1) perforated distributor of the utility model has the characteristics that flexible adjustment：Work of the perforated distributor in horizontal roller
Under, it can be moved freely along arc horizontal slide rail；Simultaneously under the action of adjusting handle, perforated distributor can also be along
Its own central shaft is transported, to adjust the relative angle of air distribution plate and flow of flue gas direction；
(2) perforated distributor of the utility model has the characteristics that resistance is small：Opened up on air distribution plate disappear resistance hole can be with
It prevents the leeward side in air distribution plate from vortex and recirculating zone occur, drag losses can be effectively reduced.
Description of the drawings
Fig. 1 is the scheme of installation (front view) of the utility model；
Fig. 2 is the scheme of installation (left view) of the utility model；
Fig. 3 is the structural schematic diagram of the utility model movable type perforated distributor component.
Specific implementation mode
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1, the denitrating system of apparatus of thermo-electric power boiler includes fixed deflector 2, flow straightening grid 4 and catalysis in the present embodiment
Oxidant layer 6, fixed deflector 2 are mounted on ascent stage (according to flow of flue gas direction, similarly hereinafter) and the level of apparatus of thermo-electric power boiler denitration flue 1
The junction of the junction and horizontal segment and descending branch of section, flow straightening grid 4 and catalyst layer 6 are mounted on apparatus of thermo-electric power boiler from top to bottom
The descending branch of denitration flue 1；
As shown in Figs. 1-3, a kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system in the present embodiment, including movable type are more
The entrance sampling gun 5,9 of hole air distribution plate component 3,9 exports sampling gun 7, sampling main pipe 11, Flue Gas Pretreatment Device 12, sampling
Pump 13, flue gas analyzer 14, computer processing system 15, ammonia density in-line analyzer 16 and the online flow velocity of 9 high temperature resistants are surveyed
Measure instrument 17；The movable type perforated distributor component 3 includes adjusting handle 31, horizontal roller 32, arc horizontal slide rail 33, support
Pedestal 34, perforated distributor 35, air distribution plate support shaft 36 and seal assembly 38 are equipped with equally distributed on perforated distributor 35
Disappear resistance hole 37, and air distribution plate support shaft 36 is located on perforated distributor 35, at the both ends of air distribution plate support shaft 36 from outer to interior difference
There are one 31, horizontal rollers 32 of adjusting handle and a seal assembly 38, horizontal roller 32 is located at arc level cunning for installation
In rail 33, arc horizontal slide rail 33 is supported fixation by support base 34；The both ends of air distribution plate support shaft 36 are pierced by denitration
The outer wall of flue 1 makes perforated distributor 35 be located in the inner cavity of Denitration in Boiler flue 1, and positioned at the top of flow straightening grid 4, peace
Adjusting handle 31, horizontal roller 32 and seal assembly 38 are installed, horizontal roller 32 is placed in arc horizontal slide rail 33, passes through branch
Support pedestal 34 is supported fixation, and is sealed by seal assembly 38 and denitration flue 1, and 9 entrance sampling guns 5 pass through pot
It 1 wall of stove denitration flue and stretches into Denitration in Boiler flue 1, and between flow straightening grid 4 and catalyst layer 6,9 outlet samplings
Rifle 7 and the online Flow speed measurer 17 of 9 high temperature resistants pass through 1 wall of Denitration in Boiler flue and stretch into Denitration in Boiler flue 1, and position
In the lower section of catalyst layer 6, the outlet flue of 9 entrance sampling guns 5 and 9 outlet sampling guns 7 passes through electric shutting-door 10 respectively
It is connect with the smoke inlet of sampling main pipe 11, the outlet flue of sampling main pipe 11 is connect with the smoke inlet of Flue Gas Pretreatment Device 12, cigarette
The outlet flue of gas pretreatment unit 12 is divided with flue gas analyzer 14 and ammonia density online respectively by the pipeline equipped with sampling pump 13
Analyzer 16 connects, flue gas analyzer 14, ammonia density in-line analyzer 16 and the online connection of Flow speed measurer 17 meter of 9 high temperature resistants
Calculation machine processing system 15, computer processing system 15 are used for resistance to according to flue gas analyzer 14, ammonia density in-line analyzer 16 and 9
Online 17 feedack of Flow speed measurer of high temperature divides in line computation catalyst activity index, the automatic flue gas load dynamic that calculates
With scheme, in order to use mobile perforated distributor component to carry out on-line tuning to flue gas flow field.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (2)
1. a kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system, it is characterised in that：Including mobile perforated distributor component
(3), multiple entrance sampling guns (5), multiple outlet sampling guns (7), sampling main pipe (11), Flue Gas Pretreatment Device (12), sampling
It is online to pump (13), flue gas analyzer (14), computer processing system (15), ammonia density in-line analyzer (16) and multiple high temperature resistants
The perforated distributor (35) of formula Flow speed measurer (17), mobile perforated distributor component (3) is located at Denitration in Boiler flue (1)
In inner cavity, and positioned at the top of flow straightening grid (4), multiple entrance sampling guns (5) pass through Denitration in Boiler flue (1) wall and stretch into pot
In stove denitration flue (1), and between flow straightening grid (4) and catalyst layer (6), multiple outlet sampling guns (7) and multiple resistance to
The online Flow speed measurer of high temperature (17) passes through Denitration in Boiler flue (1) wall and stretches into Denitration in Boiler flue (1), and is located at and urges
The outlet flue of the lower section of agent layer (6), multiple entrance sampling guns (5) and multiple outlet sampling guns (7) passes through electronic shutdown respectively
Door (10) with sampling main pipe (11) smoke inlet connect, sample main pipe (11) outlet flue and Flue Gas Pretreatment Device (12) into
Mouth connects, the outlet flue of Flue Gas Pretreatment Device (12) by be equipped with the pipeline of sampling pump (13) respectively with flue gas analyzer
(14) it is connected with ammonia density in-line analyzer (16), flue gas analyzer (14), ammonia density in-line analyzer (16) and multiple resistance to height
Online Flow speed measurer (17) the connection computer processing system (15) of temperature, computer processing system (15) are used for according to flue gas point
Analyzer (14), ammonia density in-line analyzer (16) and the online Flow speed measurer of multiple high temperature resistants (17) feedack are counted online
Catalyst activity index is calculated, it is automatic to calculate flue gas load Dynamic Assignment, in order to use mobile perforated distributor component
On-line tuning is carried out to flue gas flow field.
2. a kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system according to claim 1, it is characterised in that：The shifting
Dynamic formula perforated distributor component (3) includes adjusting handle (31), horizontal roller (32), arc horizontal slide rail (33), support base
(34), perforated distributor (35), air distribution plate support shaft (36) and seal assembly (38) are equipped with uniform on perforated distributor (35)
Resistance hole (37) that disappears of distribution, air distribution plate support shaft (36) is located on perforated distributor (35), the two of air distribution plate support shaft (36)
End is separately installed with an adjusting handle (31), a horizontal roller (32) and a seal assembly (38) from outer to interior, horizontal
Idler wheel (32) is located in arc horizontal slide rail (33), and arc horizontal slide rail (33) is supported fixation by support base (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721660004.8U CN207722634U (en) | 2017-12-01 | 2017-12-01 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721660004.8U CN207722634U (en) | 2017-12-01 | 2017-12-01 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
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| Publication Number | Publication Date |
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| CN207722634U true CN207722634U (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721660004.8U Expired - Fee Related CN207722634U (en) | 2017-12-01 | 2017-12-01 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824044A (en) * | 2017-12-01 | 2018-03-23 | 山西大学 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
| CN110514569A (en) * | 2019-07-08 | 2019-11-29 | 佛山市顺德区阿波罗环保器材有限公司 | The ducting assembly of strainability detection system of fume filtering element |
| CN110813082A (en) * | 2019-11-18 | 2020-02-21 | 中冶长天国际工程有限责任公司 | SCR reactor current-sharing device, current-sharing control method and system |
-
2017
- 2017-12-01 CN CN201721660004.8U patent/CN207722634U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824044A (en) * | 2017-12-01 | 2018-03-23 | 山西大学 | A kind of flow fieldoptimization device of apparatus of thermo-electric power boiler denitrating system |
| CN107824044B (en) * | 2017-12-01 | 2023-09-22 | 山西大学 | Flow field optimizing device of thermal power boiler denitration system |
| CN110514569A (en) * | 2019-07-08 | 2019-11-29 | 佛山市顺德区阿波罗环保器材有限公司 | The ducting assembly of strainability detection system of fume filtering element |
| CN110813082A (en) * | 2019-11-18 | 2020-02-21 | 中冶长天国际工程有限责任公司 | SCR reactor current-sharing device, current-sharing control method and system |
| CN110813082B (en) * | 2019-11-18 | 2022-04-12 | 中冶长天国际工程有限责任公司 | SCR reactor current-sharing device, current-sharing control method and system |
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