CN101066522A - Automatic flushing system and process for pH meter in desulfurizing absorption tower - Google Patents
Automatic flushing system and process for pH meter in desulfurizing absorption tower Download PDFInfo
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- CN101066522A CN101066522A CN 200610147470 CN200610147470A CN101066522A CN 101066522 A CN101066522 A CN 101066522A CN 200610147470 CN200610147470 CN 200610147470 CN 200610147470 A CN200610147470 A CN 200610147470A CN 101066522 A CN101066522 A CN 101066522A
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Abstract
The present invention discloses automatic flushing system and process for pH meter in desulfurizing absorption tower. The system includes a pH meter, a pH detecting tank, a pH detecting tank bypass valve, a slurry feeding valve, a three way solenoid valve, a PLC controller and a text display. The automatic flushing process includes the following steps: opening the pH detecting tank bypass valve and closing the slurry feeding valve to exhaust the detected slurry from the detecting tank; controlling the pH meter three way solenoid valve for flushing the pH detecting probe with clear water and cleaning liquid; and closing the pH detecting tank bypass valve and opening the slurry feeding valve for filling the detecting tank with detected slurry. The present invention makes it possible to reach the equal flushing effect on common pH meter with spraying head in the condition of departing from the slurry completely.
Description
Technical field
The present invention relates to pH meter self-stripping system and method in the desulfuration absorbing tower in a kind of power plant desulfurization project.
Background technology
In the power plant desulfurization project, the pH value in the absorption tower is the core parameter in the whole desulphurization system, and it is an important indicator weighing chemical response situation in the absorption tower.Therefore, can the pH value measure the key point that has accurately also just become guarantee desulfuration efficiency.Owing to measure the importance of pH value, in desulfurizing item, often be to adopt pair redundant configuration to the checkout equipment-pH meter of pH value, owing to the medium of detected object is a gypsum slurries, have very strong adhesion, require pH meter to have automatic water cleaning function usually.What adopt in existing desulfurization is a band pulling type cylinder pH meter, by the cylinder action, automatically the pH measuring probe is drawn to from medium and carries out the water cleaning in the cleaning chambers, and system complex, cost is higher, and price is one cover about 130,000 RMB.
Summary of the invention
The technical issues that need to address of the present invention are: when pH meter cleans, be not that the pH measuring probe is released in detecting jar, but eject the pH measuring probe is washed detecting a jar medium.
In order to solve this technical problem, technical scheme of the present invention is: pH meter self-stripping system and system flow thereof in the desulfuration absorbing tower are characterized in:
1. self-stripping system comprises:
Two PH meters, each PH meter is formed by connecting by cable by measurement circuitry and PH gage outfit;
Two PH detect jar, are equipped with respectively that a PH gage outfit and one are used for the clear water flushing and cleaning fluid washes shared shower nozzle;
Two slurries induction valves detect with separately PH respectively and jar are connected, two PH are detected in the jars refill tested slurries;
A PH detects a jar bypass valve, detecting jar with two PH respectively by pipeline is connected, when a slurries induction valve cut out, bypass valve can keep the slurries proper flow of slurries feeding pipeline with another slurries induction valve, caused the deposition fouling to avoid stagnating because of slurries;
Two groups of totally four three-way magnetic valves, one is connected with fresh water pipeline in each group, and another is connected with the cleaning fluid pipeline that contains 10%HCL, and clear water washes and cleaning fluid washes so that two PH measuring probes are carried out respectively;
A PLC controller is used for controlling the flushing flow process that PH counts;
A text display is used as man-machine interface;
2. adopt said system and realize that pH meter in the desulfuration absorbing tower washes flow process automatically and is:
1) opens pH and detect a jar bypass valve, close a pH detection jar slurries induction valve, make and detect a jar interior tested slurries discharge;
2) the control pH meter carries the action of three-way magnetic valve, and the pH measuring probe is carried out clear water flushing and cleaning fluid flushing respectively;
3) close pH and detect a jar bypass valve, open pH and detect a jar slurries induction valve, make to refill tested slurries in detecting jar.
Described from begin to discharge slurries to the time interval that beginning water washes this twice program be 1-3 minute.
Described clear water flushing is 1-2 minute with the time of cleaning fluid flushing.
The present invention is a flushing flow process of controlling pH meter with PLC for the control system core, with text display as human interface device.Its major control object is the magnetic valve that is used to wash and the automatic valve on the process pipe.
The invention has the beneficial effects as follows that with pH meter self-stripping system and system flow thereof in the desulfuration absorbing tower of the present invention, just available normal tape injector head pH meter is issued to equal cleaning performance in the situation that breaks away from slurries fully.
Description of drawings:
Fig. 1 is a pH meter self-stripping system structure chart of the present invention;
Fig. 2 is a pH meter self-stripping system flow chart of the present invention.
Among the figure: t0-slurries drain time t1--water dashes 1 time t2--liquid and dashed for 1 time
T3--water dashes 2 time t4--liquid and dashes 2 time t5--water towards 3 times
T6A-B washing time t7-washes blanking time
The specific embodiment
By shown in Figure 1, the pH meter self-stripping system in a kind of desulfuration absorbing tower comprises: two PH meters (A, B), and the PH meter is formed by connecting by cable by measurement circuitry 1,11 and PH gage outfit 3,10; Two PH detect jars 2,8, PH gage outfit 3,10 and be used for the clear water flushing and the shared shower nozzle 4,9 of cleaning fluid places PH to detect jars 2,8; Two slurries induction valves 5,7 detect jars 2,8 with separately PH respectively and are connected, two PH are detected in the jars refill tested slurries; A PH detection jar bypass valve 6 detects jar 2,8 with two PH respectively by pipeline and is connected, when two slurries induction valves 5,7 cut out, so that the tested slurries in the PH detection jar 2,8 are from the there discharge; Four three-way magnetic valves, be connected with fresh water (FW) 19 by pipeline for wherein two 15,16, in addition two 14,17 are connected with the cleaning liquid bath 18 that contains 10%HCL by pipeline, carry out respectively by clear water flushing and 4,9 pairs two PH measuring probes 3,10 of the shared shower nozzle of cleaning fluid that clear water washes and cleaning fluid washes; A PLC controller 13 is used for controlling the flushing flow process that PH counts; A text display 12 is used as man-machine interface.
Shown in Fig. 1,2, pH meter self-stripping system flow process is:
1) opens pH and detect a jar bypass valve 6 (V3), close pH detection jar slurries induction valve 5 or 7 (V1 or V2), make pH detect a jar interior tested slurries discharge;
2) (action V22) is carried out clear water flushing and cleaning fluid flushing respectively to pH measuring probe 3,10 to control three-way magnetic valve 14,15 or 16,17 for V11, V12 or V21;
3) close pH and detect a jar bypass valve 6 (V3), open pH and detect jar slurries induction valve 5 or 7 (V1 or V2), make pH refill tested slurries in detecting jar.
Describedly wash time interval (t0) this twice program to beginning water and select very importantly, do not arranged as yet, influence developing result as too short then slurries from beginning to discharge slurries; Among air, can influence its service life as oversize then pH measuring probe prolonged exposure.Be chosen as 1-3 minute through test.Select 1 minute in the present embodiment.
The time of described clear water flushing and cleaning fluid flushing, (t4 t5) also can have influence on developing result, is chosen as 1-2 minute through test for t2, t3.Select 1.5 minutes in the present embodiment.
Every cover pH meter flushing frequency is for once a day, and two cover pH meters are about 12 hours.
Two PH meter of every absorption tower redundancy adopts a cover PLC device also to avoid not matching on the flushing sequential that may occur that pulling type pH meter controller timing error brings.
PH meter self-stripping system of the present invention has been tried out nearly 1 year in the desulfurizing item of Waigaoqiao Bonded Zone, it is very stable to work, its degree of stability even exceeded the pulling type that in sundry item, adopts and clean pH meter automatically, and per two covers add that with the pH meters of this backwashing manner redundant configuration the cost of PLC and switch board also only is 40% of the sort of pulling type pH meter.
Claims (3)
1. pH meter self-stripping system and the system flow thereof in the desulfuration absorbing tower is characterized in that:
1) self-stripping system comprises:
Two PH meters, each PH meter is formed by connecting by cable by measurement circuitry and PH gage outfit;
Two PH detect jar, are equipped with respectively that a PH gage outfit and one are used for the clear water flushing and cleaning fluid washes shared shower nozzle;
Two slurries induction valves detect with separately PH respectively and jar are connected, two PH are detected in the jars refill tested slurries;
A PH detects a jar bypass valve, detecting jar with two PH respectively by pipeline is connected, when a slurries induction valve cut out, bypass valve can keep the slurries proper flow of slurries feeding pipeline with another slurries induction valve, caused the deposition fouling to avoid stagnating because of slurries;
Two groups of totally four three-way magnetic valves, one is connected with fresh water pipeline in each group, and another is connected with the cleaning fluid pipeline that contains 10%HCL, and clear water washes and cleaning fluid washes so that two PH measuring probes are carried out respectively;
A PLC controller is used for controlling the flushing flow process that PH counts;
A text display is used as man-machine interface;
2) adopt said system and realize that pH meter in the desulfuration absorbing tower washes flow process automatically and is:
A. open pH and detect a jar bypass valve, close a pH detection jar slurries induction valve, make and detect a jar interior tested slurries discharge;
B. control the action that pH meter carries three-way magnetic valve, the pH measuring probe is carried out clear water flushing and cleaning fluid flushing respectively;
C. close a pH detection jar bypass valve, open a pH detection jar slurries induction valve, make to detect in the jar to refill tested slurries.
2. pH meter self-stripping system and system flow thereof in the desulfuration absorbing tower according to claim 1 is characterized in that: described from begin to discharge slurries to the time interval that beginning water washes this twice program be 1-3 minute.
3. pH meter self-stripping system and system flow thereof in the desulfuration absorbing tower according to claim 1 is characterized in that: described clear water flushing is 1-2 minute with the time of cleaning fluid flushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101474706A CN100500268C (en) | 2006-12-19 | 2006-12-19 | Automatic flushing system and process for pH meter in desulfurizing absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101474706A CN100500268C (en) | 2006-12-19 | 2006-12-19 | Automatic flushing system and process for pH meter in desulfurizing absorption tower |
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| Publication Number | Publication Date |
|---|---|
| CN101066522A true CN101066522A (en) | 2007-11-07 |
| CN100500268C CN100500268C (en) | 2009-06-17 |
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| CNB2006101474706A Active CN100500268C (en) | 2006-12-19 | 2006-12-19 | Automatic flushing system and process for pH meter in desulfurizing absorption tower |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600659A (en) * | 2012-02-09 | 2012-07-25 | 东营华泰化工集团有限公司 | Pickling technique of coarse salt filter |
| CN102728214A (en) * | 2012-07-25 | 2012-10-17 | 天津市电力公司 | Intelligent control method for preparing limestone slurry |
| CN105056742A (en) * | 2015-08-31 | 2015-11-18 | 国投钦州发电有限公司 | Fuel coal desulfurization slurry pH detection device |
| CN105223254A (en) * | 2015-11-16 | 2016-01-06 | 云南华联锌铟股份有限公司 | A kind of sampling pre-service and multithread road switch PH measurement mechanism |
| CN113607797A (en) * | 2021-08-05 | 2021-11-05 | 上海电气自动化设计研究所有限公司 | Desulfurization detection system |
-
2006
- 2006-12-19 CN CNB2006101474706A patent/CN100500268C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600659A (en) * | 2012-02-09 | 2012-07-25 | 东营华泰化工集团有限公司 | Pickling technique of coarse salt filter |
| CN102728214A (en) * | 2012-07-25 | 2012-10-17 | 天津市电力公司 | Intelligent control method for preparing limestone slurry |
| CN102728214B (en) * | 2012-07-25 | 2014-06-25 | 天津市电力公司 | Intelligent control method for preparing limestone slurry |
| CN105056742A (en) * | 2015-08-31 | 2015-11-18 | 国投钦州发电有限公司 | Fuel coal desulfurization slurry pH detection device |
| CN105223254A (en) * | 2015-11-16 | 2016-01-06 | 云南华联锌铟股份有限公司 | A kind of sampling pre-service and multithread road switch PH measurement mechanism |
| CN105223254B (en) * | 2015-11-16 | 2017-08-29 | 云南华联锌铟股份有限公司 | One kind sampling pretreatment and many streams switch PH measurement apparatus |
| CN113607797A (en) * | 2021-08-05 | 2021-11-05 | 上海电气自动化设计研究所有限公司 | Desulfurization detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100500268C (en) | 2009-06-17 |
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