CN117123044A - Automatic slurry supply method and device for wet desulfurization system, electronic equipment and storage medium - Google Patents
Automatic slurry supply method and device for wet desulfurization system, electronic equipment and storage medium Download PDFInfo
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- CN117123044A CN117123044A CN202311060714.7A CN202311060714A CN117123044A CN 117123044 A CN117123044 A CN 117123044A CN 202311060714 A CN202311060714 A CN 202311060714A CN 117123044 A CN117123044 A CN 117123044A
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- 239000002002 slurry Substances 0.000 title claims abstract description 88
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 32
- 230000023556 desulfurization Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 156
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 230000000630 rising effect Effects 0.000 claims description 20
- 238000004590 computer program Methods 0.000 claims description 11
- 238000011217 control strategy Methods 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000004886 process control Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005032 impulse control Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/30—Controlling by gas-analysis apparatus
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of desulfurization system control, in particular to an automatic slurry supply method, an automatic slurry supply device, electronic equipment and a storage medium of a wet desulfurization system, which comprise the following steps: detecting the concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower; judging the change trend of the current sulfur dioxide concentration value, and selecting a working mode according to the change trend of the sulfur dioxide concentration value; detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry; detecting the PH value of the slurry, and entering a basic mode; and controlling the PH value and the slurry supply flow of the slurry according to the working mode, so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission. The invention can ensure stable operation under working conditions, ensure that sulfur dioxide parameter is not out of standard and slurry PH value is stable within process control index; the wet desulfurization device can adapt to various wet desulfurization working conditions and lighten the operating pressure of operators; through automatic algorithm control, environmental protection exceeding standard event that human error leads to is avoided taking place, promotes power plant automatic control level.
Description
Technical Field
The invention relates to the technical field of desulfurization system control, in particular to an automatic slurry supply method and device for a wet desulfurization system, electronic equipment and a storage medium.
Background
Wet desulfurization technology is currently widely used in flue gas treatment systems to remove sulfur dioxide, an environmentally harmful component of flue gas. In the technology, limestone (or lime) is used as a desulfurizing agent to oxidize and absorb sulfur dioxide in the flue gas.
The desulfurization process is not complicated, but the working condition is bad, the opening control method of the slurry supply regulating valve of the slurry supply system in the prior art is usually a proportional-integral-derivative (PID) regulating method based on the PH value in the absorption tower, the control flow is shown in the figure 1, but in the practical application process, the control method has poor control effect on the concentration of sulfur dioxide in the discharged flue gas, and disturbance of the system, such as slurry quality deterioration, unstable raw flue gas concentration, irregular valve flow characteristics and the like, often occurs. The traditional single closed loop control or cascade control, even the composite feedforward and cascade impulse control, is designed, and the effect is not ideal.
Disclosure of Invention
The invention provides an automatic slurry supply method, an automatic slurry supply device, electronic equipment and a storage medium for a wet desulfurization system, which overcome the defects of the prior art, and can effectively solve the problems that the effect is not ideal when the traditional control algorithm is used and the system is frequently disturbed.
One of the technical schemes of the invention is realized by the following measures: an automatic slurry supply method for a wet desulphurization system comprises the following steps:
detecting the concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower, judging the change trend of the current concentration value of sulfur dioxide, and selecting a working mode according to the change trend of the concentration value of sulfur dioxide;
the working modes comprise a third working mode, a second working mode and a first working mode, wherein the first working mode is a basic mode;
detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry;
detecting the PH value of the slurry, and entering a basic mode;
and controlling the PH value and the slurry supply flow of the slurry according to the working mode, so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
In the first working mode, when the current flow is judged to be in the control range and the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold value, the control strategy is to track the set value through PID closed-loop control of the slurry PH value.
In the second working mode, when the flow of the controlled medium exceeds the upper limit and the lower limit, the algorithm cuts into the second working mode when the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold value, the flow is controlled to return to the range of the limit value by decreasing the incremental control valve, and when the flow speed increasing or decreasing trend is judged to be slow or the flow returns to the range of the limit value, the algorithm returns to the first working mode.
In the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode from the first working mode, increases the output of the control valve, increases the slurry supply flow rate until the algorithm judges that the sulfur dioxide does not have the rapid rising trend, and returns to the first working mode;
or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through the alarm threshold value, the algorithm directly cuts into the third working mode from the second working mode, and the output of the valve is controlled in an incremental manner until the algorithm judges that the sulfur dioxide does not have the rapid rising trend, and the algorithm returns to the second working mode;
or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode, and the output of the valve is controlled by increasing, when the algorithm judges that the sulfur dioxide has no rapid rising trend, the algorithm returns to the original working mode, namely, the flow rate is over-limit, the algorithm enters the second working mode, the flow rate returns to the limit value, and the first working mode is entered; and finally returns to the first mode of operation.
The authority of the working mode is as follows from big to small in sequence: a third operation mode, a second operation mode and a first operation mode.
And judging the change trend of the current sulfur dioxide concentration value through a DCS differential function module.
The second technical scheme of the invention is realized by the following measures: an automatic slurry supply device of a wet desulfurization system, comprising:
the detection unit is used for detecting the sulfur dioxide concentration, the flow rate and the PH value of the flue gas at the outlet of the absorption tower;
the mode selection unit is used for judging the change trend of the current sulfur dioxide concentration value, detecting the flow of the slurry supply pipeline and detecting the pH value of slurry;
and the slurry supply unit is used for controlling the pH value and slurry supply flow of slurry according to the working mode, so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
The third technical scheme of the invention is realized by the following measures: a storage medium storing a computer program for executing the above-described automatic slurry supply method of a wet desulfurization system.
The fourth technical scheme of the invention is realized by the following measures: an electronic device comprises a processor, a display and a storage medium, wherein the storage medium is the storage medium, and the processor is used for running a computer program on the storage medium.
The invention relates to a strategy application of an algorithm for automatically supplying slurry to control standard emission of sulfur dioxide gas in a wet desulfurization system. The method has good application control effect, the operation staff can put into self control according to the stable working condition mode which is manually adjusted by the operation staff, the algorithm can ensure stable operation under the working condition, and the sulfur dioxide parameter is ensured not to exceed the standard, and the PH value of the slurry is ensured to be stable in the process control index. The invention breaks through the traditional thinking, realizes the process control strategy by various means, and adds various parameter control strategies on the traditional control framework algorithm architecture. The invention designs and adjusts a control strategy with good effect in three modes, and particularly creatively utilizes a DCS differential function module to make a trend judgment algorithm for judging the change trend of the current sulfur dioxide concentration value. The invention can adapt to various wet desulfurization working conditions, ensure long-time investment and lighten the operating pressure of operators. Through automatic algorithm control, environmental protection exceeding standard event that can avoid human error to lead to takes place, has promoted the automatic control level of power plant, is favorable to building intelligent power plant.
Drawings
FIG. 1 is a schematic flow chart of an automatic slurry supply method of a wet desulfurization system in the prior art.
Fig. 2 is a schematic diagram of a first operation mode of the embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a first operation mode entering a second operation mode according to an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating a first operation mode entering a third operation mode according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a second operation mode of the embodiment of the present invention.
Fig. 6 is a schematic diagram of a second operation mode entering a first operation mode according to an embodiment of the present invention.
Fig. 7 is a schematic diagram illustrating the second operation mode entering the third operation mode according to the embodiment of the present invention.
Fig. 8 is a schematic diagram of a third mode of operation of an embodiment of the present invention.
Fig. 9 is a schematic diagram illustrating a third operation mode entering a second operation mode according to an embodiment of the present invention.
Fig. 10 is a schematic diagram illustrating a third operation mode entering a first operation mode according to an embodiment of the present invention.
FIG. 11 is a schematic diagram of an automatic slurry supply device of a wet desulfurization system according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention is not limited by the following embodiments, and specific implementation manners can be determined according to the technical solutions and practical situations of the embodiment of the invention.
In the embodiment of the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of the drawings in the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
Embodiments of the present invention will be further described with reference to the following examples and drawings:
example 1: as shown in fig. 2 to 11, the automatic slurry supply method of the wet desulfurization system comprises the following steps: detecting the concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower, judging the change trend of the current concentration value of sulfur dioxide, and preferentially selecting a working mode according to the change trend of the concentration value of sulfur dioxide; detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry; the pH of the slurry is measured and then the initial mode is entered. The working modes comprise a third working mode, a second working mode and a first working mode, wherein the first working mode is a basic mode; and controlling the PH value and the slurry supply flow of the slurry according to the working mode to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
In the first working mode, when judging that the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold, when the flow is in the control range, the control strategy is to track the set value through PID closed-loop control of the PH value of the slurry. In the embodiment of the invention, the first working mode is a basic working mode. In the embodiment of the invention, the algorithm judgment can replace an operator to perform the monitoring judgment. The sulfur dioxide concentration value refers to the concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower, and is detected by a sulfur dioxide on-line monitoring device arranged at the outlet of the absorption tower.
In the second working mode, when judging that the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold, when the flow of the controlled medium exceeds the upper limit and the lower limit, the algorithm switches into the second working mode from the first working mode, controls the flow to return to the range of the limit value by gradually increasing the control valve, and when judging that the flow speed-up or speed-down trend is slow or the flow returns to the range of the limit value, the algorithm returns to the first working mode.
In the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode from the first working mode, increases the output of the control valve, increases the slurry supply flow rate until the algorithm judges that the sulfur dioxide does not have the rapid rising trend, and returns to the first working mode; or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through the alarm threshold value, the algorithm directly cuts into the third working mode from the second working mode, and the output of the valve is controlled in an incremental manner until the algorithm judges that the sulfur dioxide does not have the rapid rising trend, and the algorithm returns to the second working mode; or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode, and the output of the valve is controlled by increasing, when the algorithm judges that the sulfur dioxide has no rapid rising trend, the algorithm returns to the original working mode, namely, the flow rate is over-limit, the algorithm enters the second working mode, the flow rate returns to the limit value, and the first working mode is entered; and finally returns to the first mode of operation. Wherein the second mode of operation rights still cannot override the rights of the third mode of operation.
In the embodiment of the invention, the authority of the working mode is as follows from big to small in sequence: the third working mode (characterized in that the slurry supply quantity is increased, the pH value of the slurry is increased, and the sprayed slurry is fully reacted with sulfur dioxide in the flue gas), the second working mode (characterized in that the slurry supply quantity is controlled in a stable working condition range, so that the pH value of the slurry is not negligibly small), and the first working mode (characterized in that the pH value of the slurry is controlled). In the embodiment of the invention, the DCS differential function module is used for judging the change trend of the current sulfur dioxide concentration value, for example, in a first working mode or a second working mode, judging whether the current sulfur dioxide concentration value rises rapidly or not and breaking through the trend of setting an alarm threshold value. The DCS differential functional module is a functional module of the DCS.
The embodiment of the invention relates to a strategy application of an algorithm for automatically supplying slurry to control standard emission of sulfur dioxide gas in a wet desulfurization system. The method has good application control effect, the operation staff can put into self control according to the stable working condition mode which is manually adjusted by the operation staff, the algorithm can ensure stable operation under the working condition, and the sulfur dioxide parameter is ensured not to exceed the standard, and the PH value of the slurry is ensured to be stable in the process control index. The embodiment of the invention breaks through the traditional thinking, realizes the process control strategy through various means, and adds the control strategy with various parameters on the traditional control framework algorithm architecture. The embodiment of the invention designs and debugs a control strategy with good effect, has three modes, and particularly innovatively utilizes a DCS differential function module to make a trend judgment algorithm for judging the change trend of the current sulfur dioxide concentration value. The embodiment of the invention can adapt to various wet desulfurization working conditions, ensure long-time investment and lighten the operating pressure of operators. Through automatic algorithm control, environmental protection exceeding standard event that can avoid human error to lead to takes place, has promoted the automatic control level of power plant, is favorable to building intelligent power plant.
Example 2: as shown in fig. 2 to 11, the automatic slurry supply apparatus of the wet desulfurization system comprises:
the detection unit is used for detecting the sulfur dioxide concentration, the flow rate and the PH value of the flue gas at the outlet of the absorption tower;
the mode selection unit judges the change trend of the current sulfur dioxide concentration value and preferentially selects a working mode according to the change trend of the sulfur dioxide concentration value; detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry; detecting the PH value of the slurry, and then entering a basic mode;
and the slurry supply unit is used for controlling the PH value and slurry supply flow of slurry according to the working mode so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
When the device is operated, firstly, the sulfur dioxide concentration in the flue gas at the outlet of the absorption tower is detected, the change trend of the current sulfur dioxide concentration value is judged, and the working mode is preferentially selected according to the change trend of the sulfur dioxide concentration value; detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry; and detecting the PH value of the slurry, and then entering a basic mode. The working modes comprise a third working mode, a second working mode and a first working mode; and controlling the PH value and the slurry supply flow of the slurry according to the working mode to realize the control of the emission of the sulfur dioxide concentration in the flue gas emission without exceeding the standard. Specific:
in the first working mode, when judging that the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold, when the flow is in the control range, the control strategy is to track the set value through PID closed-loop control of the PH value of the slurry.
In the second working mode, when judging that the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold, when the flow of the controlled medium exceeds the upper limit and the lower limit, the algorithm directly cuts into the second working mode from the first working mode, controls the flow to return to the range of the limit value by gradually increasing the control valve, and when judging that the flow speed-up or speed-down trend is slow or the flow returns to the range of the limit value, the algorithm returns to the first working mode.
In the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode, and the output of the valve is controlled in an increasing mode until the algorithm judges that the sulfur dioxide has no rapid rising trend, the algorithm returns to the original working mode (the flow rate is over-limited, the second working mode is entered, the flow rate returns to the limit value, the first working mode is entered), and finally the first working mode is returned.
The embodiment of the invention has good application control effect, the operation staff can put into automatic control according to the stable working condition mode which is manually adjusted by the operation staff, the algorithm can ensure that the operation is stably put into operation under the working condition, and the sulfur dioxide parameter is not out of standard and the PH value of the slurry is ensured to be stable in the process control index. The embodiment of the invention designs and debugs a control strategy with good effect, has three modes, and particularly innovatively utilizes a DCS differential function module to make a trend judgment algorithm for judging the change trend of the current sulfur dioxide concentration value. The embodiment of the invention can adapt to various wet desulfurization working conditions, ensure long-time investment and lighten the operating pressure of operators. Through automatic algorithm control, environmental protection exceeding standard event caused by human error can be avoided, and the automation control level of the power plant is improved.
Example 3: the present embodiment discloses a storage medium having stored thereon a computer program for executing the above-described automatic slurry supply method of a wet desulfurization system. The storage medium is used to store a computer program, when the processor receives an execution instruction, the computer program is executed, and the method executed by the apparatus for defining a flow disclosed in any of the foregoing embodiments of the present invention may be applied to the processor or implemented by the processor. The storage medium can store a computer program for executing the automatic slurry supply method of the wet desulphurization system, so that the computer program is not easy to lose.
Example 4: the embodiment discloses an electronic device, which comprises a processor, a display and a storage medium, wherein the storage medium is the storage medium, and the processor is used for running a computer program on the storage medium. The steps of the automatic slurry supply method of the wet desulfurization system in the above method embodiment can be executed when the computer program is executed by the processor, and the specific implementation manner can refer to the method embodiment and will not be described herein.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (9)
1. An automatic slurry supply method for a wet desulfurization system is characterized by comprising the following steps:
detecting the concentration of sulfur dioxide in the flue gas at the outlet of the absorption tower, judging the change trend of the current concentration value of sulfur dioxide, and selecting a working mode according to the change trend of the concentration value of sulfur dioxide;
the working modes comprise a third working mode, a second working mode and a first working mode, wherein the first working mode is a basic mode;
detecting the flow of a slurry supply pipeline, and selecting a working mode according to the flow of slurry;
detecting the PH value of the slurry, and entering a basic mode;
and controlling the PH value and the slurry supply flow of the slurry according to the working mode, so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
2. The method for automatically supplying slurry to a wet desulfurization system according to claim 1, wherein in the first operation mode, when it is determined that the current flow is within the control range, and the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold value, the control strategy is to track the set value by PID closed-loop control of the slurry pH value.
3. The method for automatically supplying slurry to a wet desulfurization system according to claim 1, wherein in the second operation mode, when the flow of the controlled medium exceeds the upper limit and the lower limit, and when the current sulfur dioxide concentration value does not rise rapidly and breaks through the trend of setting the alarm threshold, the algorithm switches into the second operation mode, the flow is controlled to return to the limit range by decreasing and increasing the control valve, and when the flow is judged to be increased in speed or the flow is judged to be reduced in speed or the flow is judged to return to the limit range, the algorithm returns to the first operation mode.
4. The automatic slurry supply method of a wet desulfurization system according to claim 1, 2 or 3, wherein in a third working mode, when the current sulfur dioxide concentration value is judged to have a rapid rising trend and break through an alarm threshold value, the algorithm is directly switched into the third working mode from the first working mode, the output of the valve is controlled in an increasing manner, the slurry supply flow is increased until the algorithm judges that the sulfur dioxide does not have a rapid rising trend, and the algorithm returns to the first working mode;
or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through the alarm threshold value, the algorithm directly cuts into the third working mode from the second working mode, and the output of the valve is controlled in an incremental manner until the algorithm judges that the sulfur dioxide does not have the rapid rising trend, and the algorithm returns to the second working mode;
or in the third working mode, when judging that the current sulfur dioxide concentration value has a rapid rising trend and breaks through an alarm threshold value, the algorithm directly cuts into the third working mode, and the output of the valve is controlled by increasing, when the algorithm judges that the sulfur dioxide has no rapid rising trend, the algorithm returns to the original working mode, namely, the flow rate is over-limit, the algorithm enters the second working mode, the flow rate returns to the limit value, and the first working mode is entered; and finally returns to the first mode of operation.
5. The automatic slurry supply method of a wet desulfurization system according to claim 1, 2 or 3, wherein the authority of the working mode is as follows in order from large to small: a third operation mode, a second operation mode and a first operation mode.
6. The automatic slurry supply method of a wet desulfurization system according to claim 1, 2 or 3, wherein the change trend of the current sulfur dioxide concentration value is judged by a DCS differential function module.
7. An automatic slurry supply device of a wet desulfurization system, which is characterized by comprising:
the detection unit is used for detecting the sulfur dioxide concentration, the flow rate and the PH value of the flue gas at the outlet of the absorption tower;
the mode selection unit is used for judging the change trend of the current sulfur dioxide concentration value, detecting the flow of the slurry supply pipeline and detecting the pH value of slurry;
and the slurry supply unit is used for controlling the pH value and slurry supply flow of slurry according to the working mode, so as to realize the control of the standard emission of the sulfur dioxide concentration in the flue gas emission.
8. A storage medium storing a computer program for executing the automatic slurry supply method of the wet desulfurization system according to any one of claims 1 to 6.
9. An electronic device comprising a processor, a display, and a storage medium, the storage medium being the storage medium of claim 8, the processor configured to execute a computer program on the storage medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311060714.7A CN117123044A (en) | 2023-08-22 | 2023-08-22 | Automatic slurry supply method and device for wet desulfurization system, electronic equipment and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311060714.7A CN117123044A (en) | 2023-08-22 | 2023-08-22 | Automatic slurry supply method and device for wet desulfurization system, electronic equipment and storage medium |
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| CN117123044A true CN117123044A (en) | 2023-11-28 |
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| CN202311060714.7A Pending CN117123044A (en) | 2023-08-22 | 2023-08-22 | Automatic slurry supply method and device for wet desulfurization system, electronic equipment and storage medium |
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| Country | Link |
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| CN (1) | CN117123044A (en) |
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- 2023-08-22 CN CN202311060714.7A patent/CN117123044A/en active Pending
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