CN205909969U - Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system - Google Patents
Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system Download PDFInfo
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- CN205909969U CN205909969U CN201620651418.3U CN201620651418U CN205909969U CN 205909969 U CN205909969 U CN 205909969U CN 201620651418 U CN201620651418 U CN 201620651418U CN 205909969 U CN205909969 U CN 205909969U
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- differential pressure
- valve
- blow down
- desulfurization
- defroster
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Abstract
The utility model discloses a wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system, including differential pressure transmitter, desulfurization defroster and sweep the device, the desulfurization defroster is installed between flue inlet and flue outlet, before differential pressure transmitter's low tension side passes through the sampling tube and inserts the desulfurization defroster, after its high -pressure side passes through the sampling tube and insert the desulfurization defroster, still includes first blow down valve, second blow down valve, PLC controller and first protective valve, the second protective valve all be connected with the PLC controller. The utility model discloses a first protective valve, second protective valve, first blow down valve, second blow down valve that sets up and the use that combines the PLC controller make to sweep compressed air that the device saw off and carry out timing blowback to the sampling pipe and sweep, have effectively solved the jam problem of defroster differential pressure measurement production, have saved the maintenance cost in a large number, also can detect out simultaneously the differential pressure value of desulfurization defroster accurate, steadily, have simple structure, safeguard the characteristics more convenient, that the practicality is strong.
Description
Technical field
The utility model is related to a kind of differential pressure measurement system and in particular to providing a kind of thermal power plant wet process of FGD
Demister differential pressure measurement system.
Background technology
In the operation of thermal power plant wet method fume desulfurizing system, the blocking of mist separator of desulfurization will directly influence entirely
The work of system.If not only can make except fog effect is poor after mist separator of desulfurization blocking, flue gas carries that drop is many, desulfurization parameter reaches
Produce the adverse consequences such as secondary pollution less than Environmental Protection Agency's requirement standard, to environment, but also consumption can be enabled the system to and increase, affect warp
Ji performance, safe and stable operation serious or even that fgd can be affected.So mist separator of desulfurization differential pressure must be carried out accurate in real time
Measurement.Carry substantial amounts of water droplet, gypsum, powder yet with the gas at the high-pressure side sample tap in mist separator of desulfurization differential pressure
The mixtures such as dirt, easily cause sample tap blocking, thus leading to demister differential pressure measurement to be forbidden.
Existing mist separator of desulfurization differential pressure usually removes the pressure in front and back of day with fog, that is, pass through probe tube before demister
Gas pressure is guided in differential pressure transmitter afterwards, then measures again.But due to the high-pressure side sampling in mist separator of desulfurization differential pressure
Carry, in flue gas at mouthful, the blocking that the mixtures such as substantial amounts of water droplet, gypsum, dust easily cause demister differential pressure sample tap,
Cause sampled data to have deviation, make demister can not scale removal in time, thus lead to except fog effect is poor, fume emission is exceeded, impact
A series of fgd safely and effectively serious problems such as operation.
Utility model content
For above-mentioned deficiency, technical problem to be solved in the utility model is to provide a kind of measurement data accurately, surely
Fixed thermal power plant wet process of FGD demister differential pressure measurement system, it can greatly reduce the maintenance of demister differential pressure system
Measure, prevent the situation of demister differential pressure sampling line blocking.
For solving the above problems, the utility model is achieved through the following technical solutions:
Thermal power plant wet process of FGD demister differential pressure measurement system, including differential pressure transmitter, mist separator of desulfurization and
Blow device, described mist separator of desulfurization is installed between flue entrance and flue outlet, and the low-pressure side of described differential pressure transmitter is led to
Over sampling pipe is connected with the sample tap being opened on flue outlet, and the high-pressure side of differential pressure transmitter is passed through probe tube and is opened in cigarette
Sample tap on road entrance connects, and the delivery outlet of described blow device passes through two compressed air hoses respectively with each probe tube even
Logical, also include the first blow down valve, the second blow down valve, plc controller and be all connected with plc controller first protect valve, second
Protection valve, on the probe tube of low-pressure side that the first protection valve is installed on differential pressure transmitter, the second protection valve is installed on differential pressure transporting
On the on high-tension side probe tube of device；First blow down valve and the second blow down valve are respectively arranged on each compressed air hose, and wherein
The control end of one blow down valve is connected with plc controller after the first protection valve, the control end of the second blow down valve is through the second protection valve
It is connected with plc controller afterwards.
In such scheme, for improving the accuracy of detection, the number of described sample tap can be the integer between 2～5, and
Spacing between each sample tap is 1m.
In such scheme, for preventing the impact to instrument and equipment for the adverse circumstances, described plc controller and differential pressure transmitter peace
It is contained in a stainless steel chest.
In such scheme, for ease of in real time by the data is activation detecting to monitor supervision platform, described plc controller and differential pressure
All it is connected with remote monitoring platform by the wireless communication module of setting on transmitter.
In such scheme, the output end of described differential pressure transmitter can be connected with a display.
Compared with prior art, the beneficial effects of the utility model are:
The utility model passes through the first of setting and protects valve, the second protection valve, the first blow down valve, the second blow down valve and combine
The use of plc controller, can make the compressed air that blow device is sent that sampling pipe and corresponding sample tap are timed
Blowback is swept, and reaches the purpose of cleaning, thus efficiently solving the blockage problem of demister differential pressure measurement generation, saves dimension in a large number
Shield cost；Colleague also can accurately, stably detect the differential pressure value of mist separator of desulfurization, have that structure is simple, it is more convenient to safeguard,
Practical feature.
Brief description
Fig. 1 be this thermal power plant wet process of FGD demister differential pressure measurement system install and use structural representation.
In figure is numbered: 1, differential pressure transmitter；2nd, plc controller；3rd, probe tube；4th, the first protection valve；5th, the second protection
Valve；6th, the first blow down valve；7th, the second blow down valve；8th, compressed air hose；9th, blow device；10th, sample tap；11st, mist separator of desulfurization；
12nd, flue.
Specific embodiment
With reference to specific embodiments and the drawings, explanation is further explained to the utility model, but not in order to limit this
Utility model.
As shown in figure 1, thermal power plant wet process of FGD demister differential pressure measurement system, including differential pressure transmitter 1, take off
Sulphur demister 11 and blow device 9, described mist separator of desulfurization 11 is installed between flue 12 entrance and flue 12 outlet, described difference
The low-pressure side of pressure transmitter 1 is connected with the sample tap 10 being opened in flue 12 outlet by probe tube 3, differential pressure transmitter 1
High-pressure side is connected with the sample tap 10 being opened on flue 12 entrance by probe tube 3.I.e. the high-pressure side of differential pressure transmitter 1 is passed through
After before probe tube 3 is linked into mist separator of desulfurization 11, its low-pressure side is linked into mist separator of desulfurization 11 by probe tube 3.This enforcement
In example, for making field personnel be intuitive to see the differential pressure measurement value of mist separator of desulfurization 11, the output of described differential pressure transmitter 1
One display is connected with end.
The delivery outlet of described blow device 9 is connected with each probe tube 3 respectively by two compressed air hoses 8, i.e. purging dress
Put 9 to two compressed air hose 8 conveying compressed airs, blown by the timing that compressed air is carried out forward or backwards to probe tube 3
Sweep.
The number of described sample tap 10 can be the integer between 2～5, and the spacing between each sample tap 10 is 1m.
In the present embodiment, the number of described sample tap 10 is 3, respectively offers 3 on flue 12 wall body before and after mist separator of desulfurization 11
Sample tap 10.The accuracy that multiple sample taps 10 can improve sampled data is set.
Above-mentioned thermal power plant wet process of FGD demister differential pressure measurement system, also includes the first blow down valve 6, second blows
Sweep valve 7, plc controller 2 and the first protection valve 4, second protection valve 5 being all connected with plc controller 2, the first protection valve 4 is installed
On the probe tube 3 of the low-pressure side of differential pressure transmitter 1, the second protection valve 5 is installed on the on high-tension side probe tube of differential pressure transmitter 1
On 3；First blow down valve 6 and the second blow down valve 7 are respectively arranged on each compressed air hose 8, the control of the wherein first blow down valve 6
End is connected with plc controller 2 after the first protection valve 4, the 5 and plc controls after the second protection valve of the control end of the second blow down valve 7
Device 2 connects.
For meeting the purpose of field observation and remote monitoring, all by setting on described plc controller 2 and differential pressure transmitter 1
The wireless communication module put is connected with remote monitoring platform.In the present embodiment, further, for extending the use longevity of instrument and equipment
Life, described plc controller 2 and differential pressure transmitter 1 may be installed in a stainless steel chest.
The protection valve of above-mentioned employing and blow down valve are magnetic valve, and in compressed air hose 8 with each electromagnetism valve pipeline even
The place of connecing installs a hand-operated valve additional.
During utility model works: first, blow device 9 conveys air to compressed air hose 8 in real time, and passes through 4 valves
The priority keying order of door carries out to probe tube 3 purging work to reach；And the job order of 4 valves passes through plc controller 2
Set and controlled, be specifically as follows:
It is first shut off the first blow down valve 6 of the first protection valve 4 of low-pressure side → open again low-pressure side → sweep and blow certain time
Afterwards, the first blow down valve 6 → closing low-pressure side and then the first protection valve 4 → be then switched off on high-tension side second protection opening low-pressure side
After on high-tension side second blow down valve 7 of valve 5 → open again → sweep blows certain time, close on high-tension side second blow down valve 7 → finally open height
Second protection valve 5 of pressure side → complete once to sweep and blow work, can normally measure.And purge interval setting can for 1 hour, 2
Hour, 4 hours, 6 hours, 8 hours or by plc logic carry out purge time interval change.Certainly, above-mentioned 4 valves
Sweep and blow operation order and can also be other modes, be not limited to that.
These are only explanation embodiment of the present utility model, be not limited to the utility model, for this area
For technical staff, all of the present utility model spirit and principle within, any modification, equivalent substitution and improvement made etc., all
Should be included within protection domain of the present utility model.
Claims (5)
1. thermal power plant wet process of FGD demister differential pressure measurement system, including differential pressure transmitter (1), mist separator of desulfurization
(11) and blow device (9), described mist separator of desulfurization (11) is installed between flue (12) entrance and flue (12) outlet, described
The low-pressure side of differential pressure transmitter (1) is connected with the sample tap (10) being opened in flue (12) outlet by probe tube (3), differential pressure
The high-pressure side of transmitter (1) is connected with the sample tap (10) being opened on flue (12) entrance by probe tube (3), described purging
The delivery outlet of device (9) pass through two compressed air hoses (8) connect with each probe tube (3) respectively it is characterised in that: also include the
One blow down valve (6), the second blow down valve (7), plc controller (2) and be all connected with plc controller (2) first protection valve (4),
Second protection valve (5), on the probe tube (3) of low-pressure side that the first protection valve (4) is installed on differential pressure transmitter (1), the second protection
Valve (5) is installed on the on high-tension side probe tube (3) of differential pressure transmitter (1)；First blow down valve (6) and the second blow down valve (7) point
It is not installed on each compressed air hose (8), the control end of the wherein first blow down valve (6) is controlled with plc after the first protection valve (4)
Device (2) processed connects, the control end of the second blow down valve (7) is connected with plc controller (2) after the second protection valve (5).
2. thermal power plant according to claim 1 wet process of FGD demister differential pressure measurement system it is characterised in that:
The number of described sample tap (10) is the integer between 2～5, and the spacing between each sample tap (10) is 1m.
3. thermal power plant according to claim 1 wet process of FGD demister differential pressure measurement system it is characterised in that:
Described plc controller (2) and differential pressure transmitter (1) are arranged in a stainless steel chest.
4. thermal power plant according to claim 1 wet process of FGD demister differential pressure measurement system it is characterised in that:
All it is connected with remote monitoring platform by the wireless communication module of setting on described plc controller (2) and differential pressure transmitter (1).
5. the thermal power plant wet process of FGD demister differential pressure measurement system according to any one of Claims 1 to 4, its
It is characterised by: in the output end of described differential pressure transmitter (1), be connected with a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620651418.3U CN205909969U (en) | 2016-06-24 | 2016-06-24 | Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620651418.3U CN205909969U (en) | 2016-06-24 | 2016-06-24 | Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system |
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| Publication Number | Publication Date |
|---|---|
| CN205909969U true CN205909969U (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620651418.3U Active CN205909969U (en) | 2016-06-24 | 2016-06-24 | Wet flue gas desulfurization of thermal power factory defroster differential pressure measurement system |
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| CN (1) | CN205909969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017782A (en) * | 2016-06-24 | 2016-10-12 | 国投钦州发电有限公司 | Wet flue gas desulphurization mist eliminator differential pressure measurer for thermal power generation factory |
-
2016
- 2016-06-24 CN CN201620651418.3U patent/CN205909969U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017782A (en) * | 2016-06-24 | 2016-10-12 | 国投钦州发电有限公司 | Wet flue gas desulphurization mist eliminator differential pressure measurer for thermal power generation factory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Hua Inventor after: Zhang Boxing Inventor after: Yuan Haiming Inventor after: Wan Shaoneng Inventor after: Zhang Hailong Inventor after: Zhang Xu Inventor after: Yang Jiandong Inventor before: Jiang Hua Inventor before: Zhang Boxing Inventor before: Huang Xiaofeng Inventor before: Zhang Hailong Inventor before: Yang Tingzhi Inventor before: Zhang Xu Inventor before: Chen Fuyuan Inventor before: Chen Yong |