CN205787818U - A kind of coal-burning power plant SCR denitration device on-line monitoring system - Google Patents
A kind of coal-burning power plant SCR denitration device on-line monitoring system Download PDFInfo
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- CN205787818U CN205787818U CN201620574029.5U CN201620574029U CN205787818U CN 205787818 U CN205787818 U CN 205787818U CN 201620574029 U CN201620574029 U CN 201620574029U CN 205787818 U CN205787818 U CN 205787818U
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Abstract
nullThis utility model provides a kind of coal-burning power plant SCR denitration device on-line monitoring system，Belong to SCR denitration technical field，The operation conditions of current SCR denitration system can only be analyzed for solving existing on-line monitoring system，Can not be to ensureing that denitrification apparatus reliability service provides help，The problem that can not provide more reference index for upper computer control system，On-line monitoring system，Including Date Conversion Unit、Processor、Data outputting unit、Host computer，Processor connects Date Conversion Unit and data outputting unit respectively，Data outputting unit connects host computer，On-line monitoring system also includes SCR inlet flue-gas temperature collecting unit、Pyrolysis oven outlet temperature collecting unit、Nitrous oxides concentration collecting unit，SCR inlet flue-gas temperature collecting unit、Pyrolysis oven outlet temperature collecting unit、Nitrous oxides concentration collecting unit is all connected with Date Conversion Unit.On-line monitoring system of the present utility model is particularly suitable for the higher coal-burning power plant of the reliable and stable service requirement to SCR denitration device and uses.
Description
Technical field
This utility model relates to SCR denitration technical field, particularly relates to a kind of coal-burning power plant SCR denitration device on-line monitoring
System.
Background technology
In recent years, SCR (selective catalytic reduction) denitration technology is more and more used by coal-burning power plant, SCR denitration
Device is typically mounted between boiler economizer outlet and air preheater smoke inlet, and SCR denitration method has simple in construction, denitration
Efficiency advantages of higher, if the problem of fluctuation of service occurs in SCR device, will cause shadow to normal production of whole power plant
Ring, to this end, generally to arrange special monitoring system to monitor the operation conditions of SCR device, affect SCR denitration system and run surely
Factor mainly has qualitatively: the increase burn into that the escape of ammonia causes shortens catalyst life, ammonium salt sedimentation, pollution flue gas etc. and asks
Topic, and the factor such as the too high catalyst activity reduction caused of system entry flue-gas temperature, current SCR denitration system monitoring dress
Put predominantly nitrogen-oxide analyzer, although can with the concentration of on-line monitoring nitrogen oxides, but owing to running in power plant difference
Under operating mode, the concentration index of nitrogen oxides has very big difference, existing on-line monitoring system can only analyze current SCR denitration system
Operation conditions, it is impossible to ensureing that denitrification apparatus reliability service provides help, and it is single to monitor system monitoring index, it is impossible to for
Upper computer control system provides more reference index.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of in existing denitrification apparatus monitoring system-based, increases
Denitrating system entrance flue gas temperature and pyrolysis oven outlet temperature index, be supplied to host computer after data process, for ensureing denitration
System is reliable and stable runs the on-line monitoring system providing foundation.
For solving above-mentioned technical problem, embodiment of the present utility model provides a kind of coal-burning power plant SCR denitration device online
Monitoring system, including Date Conversion Unit, processor, data outputting unit, host computer, it is single that processor connects data conversion respectively
Unit and data outputting unit, data outputting unit connects host computer, and described coal-burning power plant SCR denitration device on-line monitoring system is also
Including SCR inlet flue-gas temperature collecting unit, pyrolysis oven outlet temperature collecting unit, nitrous oxides concentration collecting unit, described
SCR inlet flue-gas temperature collecting unit, pyrolysis oven outlet temperature collecting unit, nitrous oxides concentration collecting unit are all connected with data
Converting unit.
The effect of Date Conversion Unit is each collecting unit to gather data be converted to the data shape that processor accepts
Formula, the effect of processor is to carry out processing and comparison for the data collected, and result is provided by data outputting unit
To host computer, it is shown to controllers by host computer.
Further, described SCR inlet flue-gas temperature collecting unit includes that temperature sensor, sampling location are arranged on SCR
At reactor smoke inlet.
Further, described pyrolysis oven outlet temperature collecting unit includes that temperature sensor, sampling location are arranged on pyrolysis
At stove afterbody mixed gas outlet.
Further, described nitrous oxides concentration collecting unit include nitrogen-oxide analyzer, sampling location be arranged on
At the flue entrance that SCR denitration device connects and at flue outlet.
Further, described coal-burning power plant SCR denitration device also includes oxygen content collecting unit, and oxygen content gathers single
Unit connects Date Conversion Unit.
Wherein, described oxygen content collecting unit includes Thermomagnetic type oxygen analyzer, and sampling location is arranged on and fills with SCR denitration
Put at the flue entrance of connection and at flue outlet.
Having the beneficial effect that of technique scheme of the present utility model:
In such scheme, by the basis of existing SCR denitration device online monitoring system, take off according to affecting SCR
The various factors of sulfur plant running stability, increases monitoring SCR reactor inlet flue-gas temperature and pyrolysis oven outlet mixed gas
The monitoring means of temperature, monitors in conjunction with existing nitrous oxides concentration, is sent to host computer, manipulation after data conversion, process
Personnel understand the running status of denitrating system in time according to these data, if flue gas or gas temperature have exceeded the setting upper limit,
Taking treatment measures the most in time, the stable operation for SCR desulfurizer provides reliable data and guarantee.Of the present utility model
Line monitoring system is particularly suitable for the higher coal-burning power plant of the reliable and stable service requirement to SCR denitration device and uses.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of SCR denitration device online monitoring system of the present utility model.
[main element symbol description]
1, Date Conversion Unit；
2, processor；
3, data outputting unit；
4, host computer；
5, SCR inlet flue-gas temperature collecting unit；
6, pyrolysis oven outlet temperature collecting unit；
7, nitrous oxides concentration collecting unit；
8, oxygen content collecting unit.
Detailed description of the invention
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And specific embodiment is described in detail.
This utility model can only analyze the operation conditions of current SCR denitration system for existing on-line monitoring system, no
Help can be provided to guarantee denitrification apparatus reliability service, and it is single to monitor system monitoring index, it is impossible to for PC control system
The problem that system provides more reference index, it is provided that a kind of coal-burning power plant SCR denitration device on-line monitoring system.
As it is shown in figure 1, embodiment one coal-burning power plant of the present utility model SCR denitration device on-line monitoring system, specifically
Denitrification apparatus use selective-catalytic-reduction denitrified technique to reach to remove NO in flue gasXPurpose.It is anti-that boiler sets 2 SCR
Answering device, be arranged between boiler economizer outlet and air preheater smoke inlet, system is not provided with SCR reactor bypass and economizer
Bypass, flue gas flows vertically through catalyst.The reducing agent that SCR flue gas denitrification system uses is carbamide.Denitrating system is provided with a set of going back
Former dose stores and supply system, and Urea Evaporation uses electrically heated pyrolysis way.SCR reactor uses board-like catalyst or honeycomb
Formula catalyst.Catalyst purge uses compressed air and Steam Combined Purge methods.
Having two factors to have a significant impact the operational reliability of SCR denitration device, one is if SCR reactor inlet
Flue-gas temperature is too high, easily causes sintering of catalyst phenomenon, and another is owing to the escaping of ammonia forms ammonium salt (Ammonium hydrogen sulfate
.ANH4HSO4), when temperature reduces, Ammonium hydrogen sulfate can absorb the moisture in flue gas, forms corrosive solution, blocking catalyst,
Cause catalysqt deactivation, through air preheater, form Ammonium hydrogen sulfate at heat-transfer surface, and produce deposition, reduce air pre-
Hot device efficiency.In pyrolysis oven, the flow of hot-air is low or temperature is low, all urea liquid can be caused to can not get completely and be pyrolyzed and at tail
Portion forms deposition.
Design the on-line monitoring system of the present embodiment for above reason, specifically include Date Conversion Unit 1, processor 2,
Data outputting unit 3, host computer 4, processor 2 connects Date Conversion Unit 1 and data outputting unit 3 respectively, and data output is single
Unit 3 connects host computer 4, and on-line monitoring system also includes SCR inlet flue-gas temperature collecting unit 5, pyrolysis oven outlet temperature collection
Unit 6, nitrous oxides concentration collecting unit 7, SCR inlet flue-gas temperature collecting unit 5, pyrolysis oven outlet temperature collecting unit 6,
Nitrous oxides concentration collecting unit 7 is all connected with Date Conversion Unit 1.
The effect of Date Conversion Unit 1 is each collecting unit to gather data be converted to the data that processor 2 accepts
Form, the effect of processor 2 is to carry out processing and comparison for the data collected, and by result by data outputting unit 3
It is supplied to host computer 4, is shown to controllers by host computer 4.
In the present embodiment, Date Conversion Unit 1, processor 2, data outputting unit 3 can pass through on single-chip microcomputer integrated
Analog-digital converter and input/output module realize, and in the on-line monitoring system of the present embodiment, unit is all by concrete hard
Part realizes.
Concrete, SCR inlet flue-gas temperature collecting unit 5 includes that temperature sensor, sampling location are arranged on SCR reactor
At smoke inlet, gather flue-gas temperature herein.
Concrete, pyrolysis oven outlet temperature collecting unit 6 includes that temperature sensor, sampling location are arranged on pyrolysis oven afterbody
At mixed gas outlet, gather mixed gas temperature herein.
Concrete, nitrous oxides concentration collecting unit 7 includes that nitrogen-oxide analyzer, sampling location are arranged on and takes off with SCR
At the flue entrance that nitre device connects and at flue outlet, gather the nitrogen oxides at flue entrance and at flue outlet respectively dense
Degree, in the present embodiment, uses 42i type chemoluminescence method nitrogen-oxide analyzer,.
Concrete, coal-burning power plant's SCR denitration device also includes oxygen content collecting unit 8, and oxygen content collecting unit 8 is even
Connect Date Conversion Unit 1.
Wherein, oxygen content collecting unit 8 includes Thermomagnetic type oxygen analyzer, and sampling location is arranged on and SCR denitration device
At the flue entrance connected and at flue outlet, gather the oxygen content at flue entrance and at flue outlet respectively.Pass through oxygen
The monitoring of Gas content, helps controllers to understand the denitration efficiency of SCR denitration device.
When SCR denitration system is run, on-line monitoring system is except the nitrogen oxygen at normal acquisition flue entrance and at flue outlet
Outside compound concentration, also gather SCR reactor inlet flue-gas temperature and pyrolysis oven outlet mixed gas temperature, change through data,
After data analysis and contrast, monitoring result being sent to host computer 4, controllers recognizes corresponding parameter by host computer 4
Information, in the present embodiment, the higher limit of SCR reactor inlet flue-gas temperature is 430 degree, pyrolysis oven outlet mixed gas temperature
Lower limit be 320 degree, when monitor value exceedes limit value, controllers takes corresponding treatment measures in time, ensures denitration system
The reliable and stable operation of system, and then ensure the normal production of coal-burning power plant.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (6)
1. coal-burning power plant's SCR denitration device on-line monitoring system, including Date Conversion Unit, processor, data output list
Unit, host computer, processor connects Date Conversion Unit and data outputting unit respectively, and data outputting unit connects host computer, its
Being characterised by, described coal-burning power plant SCR denitration device on-line monitoring system also includes SCR inlet flue-gas temperature collecting unit, heat
Solve heater outlet temperature collecting unit, nitrous oxides concentration collecting unit, described SCR inlet flue-gas temperature collecting unit, pyrolysis oven
Outlet temperature collecting unit, nitrous oxides concentration collecting unit are all connected with Date Conversion Unit.
Coal-burning power plant the most according to claim 1 SCR denitration device on-line monitoring system, it is characterised in that described SCR enters
Mouth flue-gas temperature collecting unit includes that temperature sensor, sampling location are arranged at SCR reactor smoke inlet.
Coal-burning power plant the most according to claim 1 SCR denitration device on-line monitoring system, it is characterised in that described pyrolysis
Heater outlet temperature collecting unit includes that temperature sensor, sampling location are arranged at pyrolysis oven afterbody mixed gas outlet.
Coal-burning power plant the most according to claim 1 SCR denitration device on-line monitoring system, it is characterised in that described nitrogen oxygen
Compound concentration collecting unit includes that nitrogen-oxide analyzer, sampling location are arranged on the flue entrance being connected with SCR denitration device
At place and flue outlet.
Coal-burning power plant the most according to claim 1 SCR denitration device on-line monitoring system, it is characterised in that described fire coal
Power plant's SCR denitration device also includes oxygen content collecting unit, and oxygen content collecting unit connects Date Conversion Unit.
Coal-burning power plant the most according to claim 5 SCR denitration device on-line monitoring system, it is characterised in that described oxygen
Content collecting unit includes Thermomagnetic type oxygen analyzer, sampling location be arranged at the flue entrance being connected with SCR denitration device and
At flue outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620574029.5U CN205787818U (en) | 2016-06-12 | 2016-06-12 | A kind of coal-burning power plant SCR denitration device on-line monitoring system |
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| CN201620574029.5U CN205787818U (en) | 2016-06-12 | 2016-06-12 | A kind of coal-burning power plant SCR denitration device on-line monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992278A (en) * | 2021-02-05 | 2021-06-18 | 山东大学 | Method for calculating generation temperature of ammonium bisulfate in air preheater |
| CN113441002A (en) * | 2021-07-01 | 2021-09-28 | 重庆大学 | Flue gas denitration device |
| CN114460221A (en) * | 2022-03-17 | 2022-05-10 | 触媒净化技术(南京)有限公司 | Denitration process control method and system |
| CN114459545A (en) * | 2022-03-17 | 2022-05-10 | 触媒净化技术(南京)有限公司 | Method and system for prolonging service life of denitration catalyst |
-
2016
- 2016-06-12 CN CN201620574029.5U patent/CN205787818U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112992278A (en) * | 2021-02-05 | 2021-06-18 | 山东大学 | Method for calculating generation temperature of ammonium bisulfate in air preheater |
| CN112992278B (en) * | 2021-02-05 | 2023-03-14 | 山东大学 | Method for calculating generation temperature of ammonium bisulfate in air preheater |
| CN113441002A (en) * | 2021-07-01 | 2021-09-28 | 重庆大学 | Flue gas denitration device |
| CN113441002B (en) * | 2021-07-01 | 2023-01-03 | 重庆大学 | Flue gas denitration device |
| CN114460221A (en) * | 2022-03-17 | 2022-05-10 | 触媒净化技术(南京)有限公司 | Denitration process control method and system |
| CN114459545A (en) * | 2022-03-17 | 2022-05-10 | 触媒净化技术(南京)有限公司 | Method and system for prolonging service life of denitration catalyst |
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