CN109157973A - A kind of absorption tower slurries PH auto-adjustment control method - Google Patents
A kind of absorption tower slurries PH auto-adjustment control method Download PDFInfo
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- CN109157973A CN109157973A CN201811048503.0A CN201811048503A CN109157973A CN 109157973 A CN109157973 A CN 109157973A CN 201811048503 A CN201811048503 A CN 201811048503A CN 109157973 A CN109157973 A CN 109157973A
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- value
- absorption tower
- slurry
- control method
- slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
- G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of absorption tower slurries PH auto-adjustment control method, this method comprises: setting pH value target value；Detect the pH value of absorption tower exit slurries；According to the interlocking of the pH target value deviation of the pH value and setting detected for starching switch on/off electric valve events, to controlling the pH value in the pH target value.The present invention carries out automatically controlling absorption tower plasm PH value in the way of using closed loop intermittent controlled for slurry switch on/off electric valve, within the set range by pH value control, improves absorption tower desulfuration efficiency, and be rinsed automatically to slurry pipeline, prevents slurry pipeline from blocking.
Description
Technical field
The invention belongs to thermal power plant absorption tower slurries regulation technology fields, and in particular to a kind of absorption tower slurries PH is adjusted automatically
Save control method.
Background technique
Absorption tower plasm PH value is the important operating parameter of limestone-gypsum wet desulfuration system, and pH value reflects absorption tower
CaCO in slurries3, CaSO3.1/2H2O, CaSO4. 2H2O content and solubility influence desulfuration efficiency very big.PH value is general
Control range is 4.6-5.8, and absorption tower pH value control system is mainly the stream for passing through and adjusting and flowing into lime stone slurry in absorption tower
For amount to guarantee plasm PH value, controlling and flowing into the limestone slurry flow quantity on absorption tower is generally to pass through absorption tower plasm PH value and setting
Value be compared after through single loop or cascade loop control lime stone for starching the aperture of pitch.Due to the original of process system itself
Cause, this control mode there are biggish deferred, and due to pitch control so that when big when for slurry flow it is small, be easy blocking and supply
Starch pipeline.
Summary of the invention
The present invention provides a kind of absorption tower slurries PH auto-adjustment control method, controls plasm PH value, prevents slurry pipeline
Blocking.
The technical scheme is that a kind of absorption tower slurries PH auto-adjustment control method, this method comprises: setting PH
It is worth target value；Detect the pH value of absorption tower exit slurries；It is interlocked according to the pH target value deviation of the pH value and setting detected
For starching switch on/off electric valve events, to controlling the pH value in the pH target value.
Scheme further, it is described for slurry switch on/off electric valve using closed loop intermittent controlled mode to absorption tower plasm PH value into
Row automatically controls.
Further, described for slurry switch on/off electric valve control method be that pH value is less than setting value 0.02 in the absorption tower to scheme
When, it automatically opens and absorption tower, when pH value is greater than the set value 0.01 in absorption tower, be automatically closed for slurry for slurry motor-driven valve
Stop for slurry motor-driven valve for slurry.
Scheme further includes that slurry pipeline rinses, after carrying out pH value adjustment, flushing valve is automatically opened to for slurry further
Pipeline is rinsed, and flushing valve is automatically closed after rinsing 60 seconds.
Further, the pH value target value is 5.0-5.8 to scheme.
The invention has the advantages that the present invention starches absorption tower in the way of using closed loop intermittent controlled for slurry switch on/off electric valve
Liquid pH value carries out automatically controlling, and within the set range by pH value control, improves absorption tower desulfuration efficiency, and automatically to slurry pipeline
It is rinsed, prevents slurry pipeline from blocking.
Detailed description of the invention
Fig. 1 is the present invention for starching motor-driven valve control principle drawing；
Fig. 2 is that the present invention rinses motor-driven valve control principle drawing.
Specific embodiment
Clear and complete description is done to the present invention with reference to the accompanying drawing, so that those skilled in the art is not needing to make
Under conditions of creative work, it can sufficiently implement the present invention.
A specific embodiment of the invention is: being the present invention for slurry motor-driven valve control principle drawing and flushing as shown in Figs. 1-2
Motor-driven valve control principle drawing, a kind of absorption tower slurries PH auto-adjustment control method, this method comprises: setting pH value target value；
Detect the pH value of absorption tower exit slurries；According to the interlocking of the pH target value deviation of the pH value and setting detected for slurry switch electricity
Dynamic valve events, to controlling the pH value in the pH target value.
Further, described that absorption tower plasm PH value is carried out certainly using closed loop intermittent controlled mode for slurry switch on/off electric valve
Dynamic control.
Further, it is described for slurry switch on/off electric valve control method be when in absorption tower pH value be less than setting value 0.02 when,
It automatically opens and absorption tower is carried out for slurry motor-driven valve, when pH value is greater than the set value 0.01 in absorption tower, confession to be automatically closed for slurry
Motor-driven valve is starched to stop for slurry.
It further, further include that slurry pipeline rinses, after carrying out pH value adjustment, flushing valve is automatically opened to slurry pipeline
It is rinsed, flushing valve is automatically closed after rinsing 60 seconds.
Further, the pH value target value, can random groups load, desulphurization system inlet flue gas SO between 5.0-5.82
Concentration, exhaust gas volumn etc. artificially change setting value.
Presently preferred embodiments of the present invention is described above, it should be pointed out that the invention is not limited to above-mentioned
Particular implementation, devices and structures not described in detail herein should be understood as gives reality with the common mode in this field
It applies；Anyone skilled in the art, without departing from the scope of the technical proposal of the invention, technology according to the present invention
Essence any simple modifications, equivalents, and modifications made to the above embodiment still fall within technical solution of the present invention protection
In the range of.
Claims (5)
1. a kind of absorption tower slurries PH auto-adjustment control method, which is characterized in that this method comprises: setting pH value target value；
Detect the pH value of absorption tower exit slurries；According to the interlocking of the pH target value deviation of the pH value and setting detected for slurry switch electricity
Dynamic valve events, to controlling the pH value in the pH target value.
2. a kind of absorption tower slurries PH auto-adjustment control method according to claim 1, which is characterized in that described for slurry
Switch on/off electric valve carries out automatically controlling absorption tower plasm PH value using closed loop intermittent controlled mode.
3. a kind of absorption tower slurries PH auto-adjustment control method according to claim 2, which is characterized in that described for slurry
Switch on/off electric valve control method is to automatically open for slurry motor-driven valve when pH value is less than setting value 0.02 in absorption tower to absorption tower
It carries out for slurry, when pH value is greater than the set value 0.01 in absorption tower, is automatically closed and stops for slurry motor-driven valve for slurry.
4. a kind of absorption tower slurries PH auto-adjustment control method according to claim 1, which is characterized in that further include supplying
Pipe flushing is starched, after carrying out pH value adjustment, flushing valve, which automatically opens, is rinsed slurry pipeline, closes automatically after rinsing 60 seconds
Close flushing valve.
5. a kind of absorption tower slurries PH auto-adjustment control method according to claim 1, which is characterized in that the pH value
Target value is 5.0-5.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811048503.0A CN109157973A (en) | 2018-09-10 | 2018-09-10 | A kind of absorption tower slurries PH auto-adjustment control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811048503.0A CN109157973A (en) | 2018-09-10 | 2018-09-10 | A kind of absorption tower slurries PH auto-adjustment control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109157973A true CN109157973A (en) | 2019-01-08 |
Family
ID=64894466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811048503.0A Pending CN109157973A (en) | 2018-09-10 | 2018-09-10 | A kind of absorption tower slurries PH auto-adjustment control method |
Country Status (1)
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| CN (1) | CN109157973A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729481A (en) * | 2020-06-05 | 2020-10-02 | 浙江浩普智能科技有限公司 | Pulse control method and system for limestone slurry in wet desulphurization of coal-fired power plant |
| CN111888904A (en) * | 2020-06-16 | 2020-11-06 | 华电电力科学研究院有限公司 | Slurry density and pH control method for preventing scaling of desulfurization secondary absorption tower |
| CN111905536A (en) * | 2020-06-17 | 2020-11-10 | 天津国电津能滨海热电有限公司 | Automatic control system for pH value of slurry passing through desulfurization absorption tower |
| CN112107977A (en) * | 2020-09-29 | 2020-12-22 | 聂鹏飞 | Automatic pH value adjusting method, system and device based on desulfurization system |
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| GB2159507A (en) * | 1984-04-19 | 1985-12-04 | Mitsubishi Heavy Ind Ltd | Method for regulating concentration of carbonate |
| CN104020795A (en) * | 2014-05-26 | 2014-09-03 | 国家电网公司 | Method for preventing pH value sudden change in desulfurization system of thermal power plant |
| CN204778995U (en) * | 2015-07-03 | 2015-11-18 | 西安西热水务环保有限公司 | White lime is thrown with system among water processing system |
| CN105263604A (en) * | 2013-06-10 | 2016-01-20 | 株式会社Ihi | Device for removing impurities from water-containing gas and impurities removal system |
| CN205760591U (en) * | 2016-06-15 | 2016-12-07 | 中国大唐集团科学技术研究院有限公司 | A kind of efficient desulfurizing tower with giant |
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| CN107511056A (en) * | 2017-09-08 | 2017-12-26 | 华北电力大学（保定） | Limestone-gypsum wet desulfuration system regulating and controlling water quality method and regulation device |
| CN206996249U (en) * | 2017-07-07 | 2018-02-13 | 金川集团股份有限公司 | A kind of accurate adder-subtractor of flue gas acid preparing tail gas absorption |
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2018
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| GB2159507A (en) * | 1984-04-19 | 1985-12-04 | Mitsubishi Heavy Ind Ltd | Method for regulating concentration of carbonate |
| CN105263604A (en) * | 2013-06-10 | 2016-01-20 | 株式会社Ihi | Device for removing impurities from water-containing gas and impurities removal system |
| CN104020795A (en) * | 2014-05-26 | 2014-09-03 | 国家电网公司 | Method for preventing pH value sudden change in desulfurization system of thermal power plant |
| CN204778995U (en) * | 2015-07-03 | 2015-11-18 | 西安西热水务环保有限公司 | White lime is thrown with system among water processing system |
| CN205760591U (en) * | 2016-06-15 | 2016-12-07 | 中国大唐集团科学技术研究院有限公司 | A kind of efficient desulfurizing tower with giant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729481A (en) * | 2020-06-05 | 2020-10-02 | 浙江浩普智能科技有限公司 | Pulse control method and system for limestone slurry in wet desulphurization of coal-fired power plant |
| CN111888904A (en) * | 2020-06-16 | 2020-11-06 | 华电电力科学研究院有限公司 | Slurry density and pH control method for preventing scaling of desulfurization secondary absorption tower |
| CN111905536A (en) * | 2020-06-17 | 2020-11-10 | 天津国电津能滨海热电有限公司 | Automatic control system for pH value of slurry passing through desulfurization absorption tower |
| CN112107977A (en) * | 2020-09-29 | 2020-12-22 | 聂鹏飞 | Automatic pH value adjusting method, system and device based on desulfurization system |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Junfeng Inventor after: Qi Shaolin Inventor after: Fan Jianping Inventor after: Zhang Anxiang Inventor after: Wang Chongbo Inventor before: Wang Junfeng Inventor before: Zhang Anxiang Inventor before: Fan Jianping Inventor before: Qi Shaolin Inventor before: Wang Chongbo |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20190108 |