CN208903125U - The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia - Google Patents
The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia Download PDFInfo
- Publication number
- CN208903125U CN208903125U CN201821223580.0U CN201821223580U CN208903125U CN 208903125 U CN208903125 U CN 208903125U CN 201821223580 U CN201821223580 U CN 201821223580U CN 208903125 U CN208903125 U CN 208903125U
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- China
- Prior art keywords
- ammonia
- main road
- bypass
- intercept valve
- door
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of control systems for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia, including being successively set on for ammonia main road for ammonia main road front intercept valve, it closes the door fastly for ammonia main road, door is adjusted for ammonia main road, for ammonia main road rear intercept valve, it is described to be connected for ammonia main road front intercept valve with ammonia main pipe, it is described to be connected for ammonia main road rear intercept valve by mixing with air gas phase for ammonia flow meter, it is described to be parallel with for ammonia main road for ammonia bypass, described be equipped with for ammonia bypass adjusts door for ammonia bypass, the front end for adjusting door for ammonia bypass is equipped with for ammonia bypass front intercept valve, rear end is equipped with for ammonia bypass rear intercept valve；Utility model has the advantages that realizing switching in time when spraying ammonia filter net jam, single channel adjusting out of control, environmental protection is exceeded, air preheater pressure difference increases etc. is avoided, solving the problems, such as that current coal fired power plant SCR is frequently occluded for ammonia strainer causes denitration to be exited.
Description
Technical field
The utility model relates to a kind of coal fired power plant SCR for ammonia control system, and specifically one kind prevents coal fired power plant
The control system that SCR denitration is lacked of proper care for ammonia belongs to coal fired power plant SCR for ammonia control system field.
Background technique
Coal fired power plant SCR generally adds the control system of bypass for ammonia using dull section door, when because gas source out of hand or its
Its reason causes to adjust door and fast shutdown misses when closing, and need to arrive and open bypass door on the spot for ammonia to control NOx.Because for ammonia bypass door away from
Farther out from central station of floating dock, the unlatching bypass door used time is longer, easily causes desulfurization general export NOx hourly value exceeded.And bypass door aperture
Control is inconvenient, be easy to cause ammonia spraying amount excessive, blocks air preheater.
Summary of the invention
To solve the above-mentioned problems, the utility model devises a kind of control for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia
System processed can be switched in time another way regulating system in regulating system failure all the way, prevent desulfurization general export NOx super
Mark, solving the problems, such as that current coal fired power plant SCR is frequently occluded for ammonia strainer causes denitration to be exited.
The technical solution of the utility model are as follows:
The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia, including be successively set on for ammonia main road for ammonia
Main road front intercept valve closes the door fastly for ammonia main road, adjusts door for ammonia main road, for ammonia main road rear intercept valve, it is described for ammonia main road front intercept valve with
Ammonia main pipe be connected, it is described for ammonia main road rear intercept valve by for ammonia flow meter mix with air gas phase connect, it is described for ammonia main road simultaneously
It is associated with for ammonia bypass, described be equipped with for ammonia bypass adjusts door for ammonia bypass, and the front end for adjusting door for ammonia bypass is equipped with for ammonia
Bypass front intercept valve, rear end are equipped with for ammonia bypass rear intercept valve.
Adjust instrument gas source of the door control gas source using not homologous ray, at least a set of confession when guaranteeing that instrument atmospheric pressure is low
Ammonia system reliably working, remote operation access DCS control.
Four manual shutoff doors (for ammonia main road front intercept valve, for ammonia main road rear intercept valve, for ammonia bypass front intercept valve and for ammonia bypass
Rear intercept valve) standard-sized sheet.The main road regulating system of the pneumatic quick closing valve valve of normal use band control for ammonia；When because of measuring point failure or instrument
It is lost with gas when leading to main road regulating system failure, bypass is remotely immediately switched to by DCS and adjusts door control.Every unit needs
It is equipped with two sets of this control systems.
Utility model has the advantages that realizing switching in time when spraying ammonia filter net jam, single channel adjusting out of control, avoiding
Exceeded, the air preheater pressure difference of environmental protection increases etc., and solving current coal fired power plant SCR and being frequently occluded for ammonia strainer causes denitration to be exited
Problem.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment；
In figure: 1. for ammonia main road front intercept valve, and 2. for ammonia main road rear intercept valve, and 3. for ammonia bypass front intercept valve, and 4. for ammonia bypass
Rear intercept valve, 5. close the door fastly for ammonia main road, and 6. adjust door for ammonia main road, and 7. adjust door for ammonia bypass, and 8. for ammonia flow meter.
Specific embodiment
The preferred embodiment of the utility model is illustrated below, it should be understood that preferred embodiment described herein
It is only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment 1
As shown in Figure 1, a kind of control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia, including on for ammonia main road
It is successively set on and closes the door 5 fastly for ammonia main road front intercept valve 1, for ammonia main road, adjust door 6 for ammonia main road, for ammonia main road rear intercept valve 2, institute
State and be connected for ammonia main road front intercept valve 1 with ammonia main pipe, it is described for ammonia main road rear intercept valve by mixing with air gas for ammonia flow meter 8
It is connected, described to be parallel with for ammonia main road for ammonia bypass, described be equipped with for ammonia bypass adjusts door 7 for ammonia bypass, described for ammonia bypass
The front end for adjusting door 7 is equipped with for ammonia bypass front intercept valve 3, and rear end is equipped with for ammonia bypass rear intercept valve 4.Before ammonia main road and bypass setting
Rear intercept valve is used for the isolation of system, convenient for carrying out strainer cleaning, pitch maintenance in operation；For ammonia main road, fast close the door for transporting is set
It is cut off rapidly by virtual protection for ammonia in row；For ammonia main road and bypass setting adjusting door is used to accurately control and adjust automatically；
The real time monitoring and data statistics for ammonia amount are used for for ammonia flow meter.
Adjust instrument gas source of the door control gas source using not homologous ray, at least a set of confession when guaranteeing that instrument atmospheric pressure is low
Ammonia system reliably working, remote operation access DCS control.
Four manual shutoff doors (for ammonia main road front intercept valve, for ammonia main road rear intercept valve, for ammonia bypass front intercept valve and for ammonia bypass
Rear intercept valve) standard-sized sheet.The main road regulating system of the pneumatic quick closing valve valve of normal use band control for ammonia；When main road is stifled for ammonia strainer
Plug, measuring point failure or instrument are lost with gas when leading to main road regulating system failure, are directly opened bypass adjusting door by DCS and are supplied
Ammonia realizes main road and bypass for the rapid switching of ammonia.Every unit need to be equipped with two sets of this control systems.
Claims (1)
1. the control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia, it is characterised in that: including successively being set on for ammonia main road
It sets and is closing the door fastly for ammonia main road front intercept valve, for ammonia main road, adjusting door for ammonia main road, for ammonia main road rear intercept valve, it is described for ammonia main road
Front intercept valve is connected with ammonia main pipe, described to be connected for ammonia main road rear intercept valve by mixing with air gas phase for ammonia flow meter, the confession
Ammonia main road is parallel with for ammonia bypass, and described be equipped with for ammonia bypass adjusts door, the front end that door is adjusted for ammonia bypass for ammonia bypass
Equipped with for ammonia bypass front intercept valve, rear end is equipped with for ammonia bypass rear intercept valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821223580.0U CN208903125U (en) | 2018-07-31 | 2018-07-31 | The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821223580.0U CN208903125U (en) | 2018-07-31 | 2018-07-31 | The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208903125U true CN208903125U (en) | 2019-05-24 |
Family
ID=66568425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821223580.0U Expired - Fee Related CN208903125U (en) | 2018-07-31 | 2018-07-31 | The control system for preventing coal fired power plant SCR denitration from lacking of proper care for ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208903125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521987A (en) * | 2021-05-28 | 2021-10-22 | 大唐长春第三热电厂 | Prevent that urea hydrolyzes and supplies ammonia pipeline to block up system |
-
2018
- 2018-07-31 CN CN201821223580.0U patent/CN208903125U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521987A (en) * | 2021-05-28 | 2021-10-22 | 大唐长春第三热电厂 | Prevent that urea hydrolyzes and supplies ammonia pipeline to block up system |
| CN113521987B (en) * | 2021-05-28 | 2024-03-19 | 大唐长春第三热电厂 | Prevent urea hydrolysis ammonia supply pipeline jam system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190524 Termination date: 20200731 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |