CN204406194U - A kind of SCR denitration on-line checkingi and spray ammonia optimized control device - Google Patents
A kind of SCR denitration on-line checkingi and spray ammonia optimized control device Download PDFInfo
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- CN204406194U CN204406194U CN201520136198.6U CN201520136198U CN204406194U CN 204406194 U CN204406194 U CN 204406194U CN 201520136198 U CN201520136198 U CN 201520136198U CN 204406194 U CN204406194 U CN 204406194U
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- dcs
- measuring instrument
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- spray ammonia
- cigarette side
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a kind of SCR denitration on-line checkingi and spray ammonia optimized control device, comprise DCS controller, DCS controller respectively with flue gas flow measuring instrument, catalysagen cigarette side NO
xmeasuring instrument, catalysagen cigarette side oxygen amount measuring instrument, catalyzer clean cigarette side NO
xmeasuring instrument, spray ammonia variable valve, DCS engineer station, DCS history station, DCS operator station, NH
3flow instrumentation, catalyst performance calculation server are connected, and communicate mutually between described DCS controller, DCS engineer station, DCS history station, DCS operator station, catalyst performance calculation server.The utility model realizes detecting the on-line continuous of SCR denitration performance, instructing according to on-line checkingi result plant manager catalyzer to be carried out to offline inspection or replacing, optimization spray ammonia automatic regulating system, reports to the police to excessive spray ammonia and protect in good time.
Description
Technical field
The utility model relates to SCR catalyst for denitrating flue gas and detects and automatic control technology field, is specifically related to a kind of SCR denitration performance online and detects and the automatic control and optimize device of spray ammonia.
Background technology
Selective catalytic reduction (SCR) denitrating technique is the NO in flue gas
xwith the NH spraying into flue
3enter reactor after mixing, under the effect of catalyzer, generate harmless N
2and H
2o, thus reduce NO in flue gas
xcontent.
In actual applications, be that partially catalyzed agent is pulled down from reactor to the detection method that catalyzer is general, adopt pick-up unit to detect, to assess the performance of catalyzer the apparent activity of catalyzer, micromechanism and surface deposits.Although this method possess test item comprehensively, results contrast advantage accurately, need to stop transport whole denitrating system owing to removing catalyzer, therefore, often can not implement, carry out during the maintenance of general boiler down.
In the prior art, to SCR denitration reactive system exiting flue gas NO
xconcentration value monitor, spray into the NH of reactor by automatic regulating system adjustment
3amount makes NO in reactor outlet flue gas
xcontent reach desired value.Partial denitrification spray ammonia automatic regulating system adopts the parameter such as boiler load or flue gas flow to be converted to the feed-forward regulation instruction of spray ammonia automatic regulating system as calculated, but this instruction is not owing to considering the impact of the performance change of catalyzer, regulating effect Shortcomings.
On-line checkingi is not carried out to the performance of denitrating catalyst in prior art, thus there is following problem:
1, in-service monitoring means be there is no to operating catalyst performance situation of change, be not easy to the opportunity determining offline inspection catalyzer;
2, the performance change of catalyzer affects larger on spray ammonia automatic regulating system adjusting function index and denitration efficiency, prior art cannot calculate the theory demands ammonia spraying amount of corresponding operating mode according to the performance change situation of catalyzer, cannot spray ammonia automatic regulating system, realize the functions such as the excessive warning of ammonia spraying amount according to the optimization of theory demands ammonia spraying amount.
How a kind of SCR denitration on-line checkingi and spray ammonia optimized control device are provided, the on-line continuous realizing catalyst performance detect and instruct that plant manager carries out offline inspection or replacing to catalyzer in good time according to testing result, optimization spray ammonia automatic regulating system is those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
For solving the deficiency that prior art exists; the utility model discloses a kind of SCR denitration on-line checkingi and spray ammonia optimized control device, realize detecting the on-line continuous of SCR denitration performance, instructing according to on-line checkingi result plant manager catalyzer to be carried out to offline inspection or replacing, optimization spray ammonia automatic regulating system, reports to the police to excessive spray ammonia and protect in good time.
For achieving the above object, concrete scheme of the present utility model is as follows:
A kind of SCR denitration on-line checkingi and spray ammonia optimized control device, comprise DCS controller, DCS controller respectively with flue gas flow measuring instrument, catalysagen cigarette side NO
xmeasuring instrument, catalysagen cigarette side oxygen amount measuring instrument, catalyzer clean cigarette side NO
xmeasuring instrument, spray ammonia variable valve, DCS engineer station, DCS history station, DCS operator station, NH
3flow instrumentation, catalyst performance calculation server are connected, described flue gas flow measuring instrument, catalysagen cigarette side NO
xmeasuring instrument, catalysagen cigarette side oxygen amount measuring instrument, catalyzer clean cigarette side NO
xmeasuring instrument and NH
3each self-monitoring signal is delivered to DCS controller by flow instrumentation respectively, and valve position feedback signal is delivered to DCS controller by spray ammonia variable valve, and control signal is delivered to spray ammonia variable valve by DCS controller.
Be connected to each other between DCS controller, DCS engineer station, DCS history station, DCS operator station, catalyst performance calculation server and communicate mutually, Gas Parameters measuring-signal is delivered to described catalyst performance calculation server by described DCS controller, and the data-signal obtained after comprehensive computing is sent to described DCS controller, DCS engineer station, DCS history station, DCS operator station by described catalyst performance calculation server.
DCS history station is used for data stored record; DCS operator station is used for showing data; DCS engineer station carries out system configuration configuration, software maintenance to DCS controller, DCS history station, DCS operator station.
The beneficial effects of the utility model:
The utility model provides a kind of SCR denitration on-line checkingi and spray ammonia optimized control device.By the current performance value of catalyst performance calculation server Continuous plus catalyzer, current performance value is shown in DCS operator station, plant manager can be reminded to determine the opportunity of offline inspection catalyzer, avoid frequently stopping catalyzer running, remove catalyzer and detect; By the stored record on DCS history station of catalyzer current performance value, be convenient to the situation of change that catalyst performance is compared in plant manager inquiry; According to current performance value and the Gas Parameters of catalyzer, calculate current theory demands ammonia spraying amount, as the feed-forward regulation instruction of spray ammonia automatic regulating system, ammonia spraying amount and actual needs are matched, can reduce automatically to spray ammonia regulating system dynamic regulation time and regulation process, thus optimize spray ammonia automatic regulating system; According to current theory demands ammonia spraying amount, calculate the alarming value that current ammonia amount is excessive, when occurring to report to the police, prompting operation people finder failure cause, can avoid because of Benitration reactor exiting flue gas NO
xthe long-time excessive spray ammonia phenomenon that the equipment such as measuring instrument, spray ammonia automatic regulating system occur defect and cause; According to current theory demands ammonia spraying amount; calculate the protection value that current ammonia spraying amount is excessive, for comparing with actual ammonia spraying amount, when actual ammonia spraying amount causes excessive because of fault; restriction spray ammonia flow variable valve continues out greatly, the generation of the abnormal conditions such as avoid the escaping of ammonia too much.
Accompanying drawing explanation
The structural representation of Fig. 1 a kind of SCR denitration on-line checkingi and spray ammonia optimized control device disclosed in embodiment;
In figure, 1, DCS controller, 2, flue gas flow measuring instrument, 3, catalysagen cigarette side NO
xmeasuring instrument, 4, catalysagen cigarette side oxygen amount measuring instrument, 5, catalyzer clean cigarette side NO
xmeasuring instrument, 6, spray ammonia variable valve, 7, DCS engineer station, 8, DCS history station, 9, NH
3flow instrumentation, 10, NH
3flow instrumentation, 11, catalyst performance calculation server.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in detail:
The utility model embodiment discloses a kind of SCR denitration on-line checkingi and spray ammonia optimized control device, detects and instruct the function such as plant manager in good time offline inspection catalyzer, optimization spray ammonia automatic regulating system, the excessive warning of ammonia spraying amount, the restriction of excessive spray ammonia according to testing result with the on-line continuous realizing SCR denitration.
See Fig. 1, the structural representation of a kind of SCR denitration on-line checkingi disclosed in the utility model embodiment and spray ammonia optimized control device, comprising:
DCS controller (1), flue gas flow measuring instrument (2), catalysagen cigarette side NO
xmeasuring instrument (3), catalysagen cigarette side oxygen amount measuring instrument (4), catalyzer clean cigarette side NO
xmeasuring instrument (5), spray ammonia variable valve (6), DCS engineer station (7), DCS history station (8), DCS operator station (9), NH
3flow instrumentation (10), catalyst performance calculation server (11), affiliated DCS controller (1) respectively with affiliated flue gas flow measuring instrument (2), catalysagen cigarette side NO
xmeasuring instrument (3), catalysagen cigarette side oxygen amount measuring instrument (4), catalyzer clean cigarette side NO
xmeasuring instrument (5), spray ammonia variable valve (6), NH
3flow instrumentation (10) connects, and affiliated DCS controller (1) receives affiliated flue gas flow measuring instrument (2), catalysagen cigarette side NO respectively
xmeasuring instrument (3), catalysagen cigarette side oxygen amount measuring instrument (4), catalyzer clean cigarette side NO
xmeasuring instrument (5), spray ammonia variable valve (6), NH
3the signal of flow instrumentation (10), and transmit control signal to affiliated spray ammonia variable valve (6); Affiliated DCS controller (1), DCS engineer station (7), DCS history station (8), DCS operator station (9), catalyst performance calculation server (11) are connected to each other, and send and receive data-signal mutually.
During use, flue gas flow measuring instrument (2), catalysagen cigarette side NO
xmeasuring instrument (3), catalysagen cigarette side oxygen amount measuring instrument (4), catalyzer clean cigarette side NO
xmeasuring instrument (5), NH
3each self-monitoring signal is delivered to DCS controller (1) by flow instrumentation (10) respectively, and valve position feedback signal is delivered to DCS controller (1) by spray ammonia variable valve (6);
DCS controller (1) converts above-mentioned signal to digital quantity signal and carries out computing, obtain the measured value signal of each signal, alarming value signal, spray ammonia governor valve control signal, each measured value signal is sent to DCS history station (8) to carry out data storage, be sent to DCS operator station (9) and carry out showing, be sent to catalyst performance calculation server (11) and carry out comprehensive computing simultaneously, each alarming value signal is sent to DCS operator station (9) report to the police, spray ammonia governor valve control signal is sent to spray ammonia variable valve (6) and carries out control of valve position;
The Gas Parameters measured value signal received is carried out comprehensive computing by catalyst performance calculation server (11), and the data-signal after calculating is sent to DCS controller (1), DCS engineer station (7), DCS history station (8), DCS operator station (9) by communication modes.
DCS history station (8) is simultaneously to NH
3the accumulated value of flow, the NO removed
xthe accumulated value of flow, the current performance value of catalyzer carry out data stored record;
DCS operator station (9) is simultaneously to NH
3the accumulated value of flow, the NO removed
xthe accumulated value of flow, the current performance value of catalyzer show, and report to the police to excessive spray ammonia.
DCS engineer station (7) carries out system configuration configuration, software maintenance to DCS controller (1), DCS history station (8), DCS operator station (9).
As can be seen from above-described embodiment, the utility model provides a kind of SCR denitration on-line continuous pick-up unit, by catalyst performance calculation server (11) and DCS controller (1), DCS history station (8), DCS operator station (9), DCS engineer station (7) connects, obtain the relevant parameter of catalyzer by communication and carry out comprehensive computing, result of calculation is sent to DCS controller (1), DCS history station (8), DCS operator station (9), DCS engineer station (7), realize reminding the in good time offline inspection catalyzer of plant manager, optimize spray ammonia automatic regulating system, the excessive warning of ammonia spraying amount, the functions such as excessive spray ammonia restriction, thus solve a difficult problem of the prior art.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (2)
1. SCR denitration on-line checkingi and a spray ammonia optimized control device, is characterized in that, comprise DCS controller, DCS controller respectively with flue gas flow measuring instrument, catalysagen cigarette side NO
xmeasuring instrument, catalysagen cigarette side oxygen amount measuring instrument, catalyzer clean cigarette side NO
xmeasuring instrument, spray ammonia variable valve, DCS engineer station, DCS history station, DCS operator station, NH
3flow instrumentation, catalyst performance calculation server are connected, described flue gas flow measuring instrument, catalysagen cigarette side NO
xmeasuring instrument, catalysagen cigarette side oxygen amount measuring instrument, catalyzer clean cigarette side NO
xmeasuring instrument and NH
3each self-monitoring signal is delivered to DCS controller by flow instrumentation respectively, and valve position feedback signal is delivered to DCS controller by spray ammonia variable valve, and control signal is delivered to spray ammonia variable valve by DCS controller.
2. a kind of SCR denitration on-line checkingi as claimed in claim 1 and spray ammonia optimized control device, it is characterized in that, be connected to each other between described DCS controller, DCS engineer station, DCS history station, DCS operator station, catalyst performance calculation server and communicate mutually, described DCS controller transmits signals to described catalyst performance calculation server, and the data-signal obtained after comprehensive computing is sent to described DCS controller, DCS engineer station, DCS history station, DCS operator station by described catalyst performance calculation server.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520136198.6U CN204406194U (en) | 2015-03-10 | 2015-03-10 | A kind of SCR denitration on-line checkingi and spray ammonia optimized control device |
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|---|---|---|---|
| CN201520136198.6U CN204406194U (en) | 2015-03-10 | 2015-03-10 | A kind of SCR denitration on-line checkingi and spray ammonia optimized control device |
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|---|---|
| CN204406194U true CN204406194U (en) | 2015-06-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226408A (en) * | 2016-07-22 | 2016-12-14 | 北京赛普泰克技术有限公司 | A kind of cycle rate computational methods of the adsorbent of gasoline absorbing desulfurization device |
| CN108051117A (en) * | 2018-01-16 | 2018-05-18 | 西安西热锅炉环保工程有限公司 | A kind of SCR denitration continuously sprays ammonia on-line temperature monitoring and control system and method |
-
2015
- 2015-03-10 CN CN201520136198.6U patent/CN204406194U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226408A (en) * | 2016-07-22 | 2016-12-14 | 北京赛普泰克技术有限公司 | A kind of cycle rate computational methods of the adsorbent of gasoline absorbing desulfurization device |
| CN106226408B (en) * | 2016-07-22 | 2019-01-08 | 北京赛普泰克技术有限公司 | A kind of cycle rate calculation method of the adsorbent of gasoline absorbing desulfurization device |
| CN108051117A (en) * | 2018-01-16 | 2018-05-18 | 西安西热锅炉环保工程有限公司 | A kind of SCR denitration continuously sprays ammonia on-line temperature monitoring and control system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20190604 Address after: 250101 Shandong Province Jinan High-tech Zone Shunhua Road 2000 Shuntai Square 9 North District 10 floors Patentee after: SHANDONG GUODIAN POWERPLANT ENGINEERING CO., LTD. Address before: Room 1002, Building 9, Shuntai Square, 2000 Shunhua Road, Jinan High-tech Zone, Shandong Province, 250101 Patentee before: Power technology Advisory Co., Ltd of Shandong state |