CN115518440A - Automatic filtering device and method for process water of power plant - Google Patents
Automatic filtering device and method for process water of power plant Download PDFInfo
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- CN115518440A CN115518440A CN202211201829.9A CN202211201829A CN115518440A CN 115518440 A CN115518440 A CN 115518440A CN 202211201829 A CN202211201829 A CN 202211201829A CN 115518440 A CN115518440 A CN 115518440A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 238000000034 method Methods 0.000 title claims abstract description 78
- 238000001914 filtration Methods 0.000 title claims abstract description 46
- 238000011010 flushing procedure Methods 0.000 claims abstract description 43
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 13
- 239000002351 wastewater Substances 0.000 abstract description 12
- 238000006477 desulfuration reaction Methods 0.000 abstract description 7
- 230000023556 desulfurization Effects 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 abstract description 5
- 239000003643 water by type Substances 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 238000005554 pickling Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 6
- 238000003556 assay Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000009288 screen filtration Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Automation & Control Theory (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an automatic filtering device and method for power plant process water. When the pressure of the inlet pressure gauge is greater than a set value or the filtering duration reaches the set value, the PLC controller enters a cleaning process, flushing water automatically enters a flushing nozzle from a flushing water inlet valve, the flushing nozzle sprays the flushing water to the filter screen to clean the filter screen, and the flushing water is discharged from the drain valve. When the set cleaning duration is reached, the PLC controller control device automatically enters a filtering process, and the filtering process and the cleaning process are alternately carried out. The invention solves the technical problem that various process waters such as power plant desulfurization slurry, desulfurization wastewater, circulating water blowdown water, pickling wastewater, ash flushing water, coal-containing wastewater and the like can not be directly subjected to online monitoring and analysis and test.
Description
Technical Field
The invention belongs to the technical field of power generation technology water quality monitoring, and relates to an automatic filtering device and method for process water of a power plant.
Background
The process water of the power plant comprises desulfurized slurry, desulfurized wastewater, circulating water blowdown water, acid pickling wastewater, ash flushing water, coal-containing wastewater and the like, and indexes such as insoluble substances, suspended substances, turbidity, colloidal impurities, COD (chemical oxygen demand), organic substances, salt content and the like in the process water are high. In order to maintain the safe and economic operation of the equipment and meet the relevant emission requirements, key indexes in the water sample need to be monitored on line or analyzed and assayed manually.
However, the desulfurization slurry and other power plant process water are complex, a water sample contains a large amount of large-particle substances such as sludge, suspended matters and the like, the accuracy of a water sample analysis instrument is influenced, and the long-time operation of the instrument can cause scouring and pollution blockage to key parts of the instrument, so that the service life of the instrument is seriously influenced; in addition, the difficulty of manual analysis and assay is increased, the accuracy of manual analysis and assay is greatly influenced, and therefore, the automatic filtering device and the method for the process water of the power plant are constructed, the process water before entering the instrument or after the manual analysis and assay is filtered, large granular substances such as sludge, suspended matters and the like in a water sample are removed, the problems can be effectively solved, the measurement accuracy of the instrument is improved, the service life of the instrument is prolonged, the workload of analysis and assay personnel is reduced, and the accuracy of the analysis and assay is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the automatic filtering device and the automatic filtering method for the process water of the power plant.
In order to achieve the aim, the automatic filtering device for the process water of the power plant comprises a water sample inlet pipeline, a water sample inlet valve, an equipment main body, a filter screen and a water sample outlet valve;
the water sample inlet pipeline is communicated with a water inlet on the side surface of the equipment main body through a water sample inlet valve, the water sample outlet valve is communicated with a clear liquid outlet on the upper part of the equipment main body, the filter screen is arranged in the equipment main body, and the filter screen is positioned above the water inlet of the equipment main body.
The sewage draining device also comprises a sewage draining valve, and the sewage draining valve is communicated with a sewage draining outlet at the bottom of the device main body.
The device also comprises a flushing water pipeline and a flushing water inlet valve; the outlet of the flushing water pipeline is communicated with a flushing nozzle in the equipment main body through a flushing water inlet valve.
Still include the manometer, the manometer is installed on water sample inlet pipe.
Still include the controller, water sample inlet valve, water sample outlet valve, blowoff valve and sparge water inlet valve are connected with the controller, and the manometer is connected with the controller.
The washing nozzle is arranged at the top of the equipment main body.
The equipment main body is divided into an upper structure and a lower structure, wherein the upper structure and the lower structure are connected through flanges, and the filter screen is positioned between the upper structure and the lower structure.
A gasket is arranged between the filter screen and the flange.
The automatic filtering method for the process water of the power plant comprises the following steps:
the power plant process water passes through the water sample inlet valve and gets into the equipment main part during filtering process, and after the filter screen filtration, the filtrating is discharged through the water sample outlet valve, and the entry manometer monitors process water pipeline pressure.
According to an inlet pressure gauge signal or preset filtering time acquired by the PLC 9, when the pressure of the inlet pressure gauge is greater than a set value or the filtering time reaches a set value, washing water automatically enters the washing nozzle from the inlet valve of the washing water, the washing nozzle sprays the washing water to the filter screen to clean the filter screen, and the washing water is discharged from the blow-down valve.
The invention has the following beneficial effects:
the automatic filtering device and the method for the process water of the power plant solve the technical problem that various process waters cannot be directly monitored and analyzed and tested on line by automatically and continuously filtering various process waters such as desulfurization slurry, desulfurization wastewater, circulating water blowdown water, pickling wastewater, ash flushing water, coal-containing wastewater and the like of the power plant on line during specific operation, and various process waters can be directly monitored and analyzed and tested on line by the automatic filtering device, so that the measurement accuracy of a water sample analyzer is greatly improved, the service life of the automatic filtering device is prolonged, the workload of analysis and test personnel is reduced, and the working efficiency and the analysis and test accuracy are improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a water sample inlet valve, 2 is a pressure gauge, 3 is an equipment main body, 4 is a filter screen, 5 is a water sample outlet valve, 6 is a flushing nozzle, 7 is a flushing water inlet valve, 8 is a blow-down valve, and 9 is a controller.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the automatic filtering apparatus for power plant process water according to the present invention comprises a water sample inlet valve 1, a pressure gauge 2, an apparatus body 3, a filter screen 4, a water sample outlet valve 5, a flushing nozzle 6, a flushing water inlet valve 7, a blowdown valve 8 and a controller 9;
the water sample inlet pipeline is communicated with a water inlet on the side face of the equipment main body 3 through a water sample inlet valve 1, the water sample outlet valve 5 is communicated with a clear liquid outlet on the upper portion of the equipment main body 3, the blow-down valve 8 is communicated with a blow-down outlet on the bottom of the equipment main body 3, an outlet of the flushing water pipeline is communicated with a flushing sprayer 6 in the equipment main body 3 through a flushing water inlet valve 7, the pressure gauge 2 is installed on the water sample inlet pipeline, the filter screen 4 is installed in the equipment main body 3, the filter screen 4 is located above the water inlet of the equipment main body 3, and the flushing sprayer 6 is installed at the top of the equipment main body 3; the outlet of the flushing water pipeline is communicated with a flushing nozzle 6 in the equipment body 3 through a flushing water inlet valve 7; the water sample inlet valve 1, the water sample outlet valve 5, the blow-down valve 8 and the flushing water inlet valve 7 are connected with the controller 9, and the pressure gauge 2 is connected with the controller 9 through a data line;
the switches of the water sample inlet valve 1, the water sample outlet valve 5, the flushing nozzle 6, the flushing water inlet valve 7 and the blow-off valve 8 can be switched on and off by a PLC (programmable logic controller) 9 according to a set control program and can be switched on and off manually. The drain valve 8 can be a regulating valve and can be a switch valve.
The equipment main body 3 is divided into an upper structure and a lower structure, wherein the upper structure and the lower structure are connected through a flange, the filter screen 4 is positioned between the upper structure and the lower structure, and a gasket is arranged between the filter screen 4 and the flange.
The filter screen 4 is made of stainless steel, and the filter screen 4 can be replaced periodically; the washing nozzle 6 is a high-pressure nozzle and is used for washing the filter screen 4 regularly.
The specific working process of the invention is as follows:
and (3) filtering: the PLC 9 controls the water sample inlet valve 1 and the water sample outlet valve 5 to be opened, the flushing nozzle 6, the flushing water inlet valve 7 and the blow-down valve 8 are closed, process water in a power plant enters the equipment main body 3 through the water sample inlet valve 1, the process water is filtered by the filter screen 4, filtrate is discharged through the water sample outlet valve 5, and the inlet pressure gauge 2 monitors the pressure of the process water pipeline.
And (3) cleaning: the length of time is filtered according to 2 signals of entry manometer or the preset that PLC controller 9 gathered, when the pressure of entry manometer 2 was greater than the setting value or was filtered when reaching the setting value, PLC controller 9 control water sample inlet valve 1, water sample outlet valve 5 are closed, flush water inlet valve 6, sparge water inlet valve 7, blowoff valve 8 are opened, the automatic sparge water that gets into flush water 6 from sparge water inlet valve 7, flush water 6 spouts the sparge water to filter screen 4, wash water from blowoff valve 8 discharges.
In the implementation process of the steps, the PLC 9 controls the filtering process and the cleaning process to be performed alternately according to a set program, and manual operation can also control the filtering process and the cleaning process to be performed alternately. The control program set by the PLC controller 9 may be a pressure feedback control program, a time feedback control program, or a program for controlling both pressure feedback and time feedback. The pressure feedback control program is that when the pressure of the inlet pressure gauge 2 is larger than a set value, the PLC 9 controls the device to enter the cleaning process, and after the cleaning is finished according to the set cleaning time, the device enters the filtering process. The time feedback control program is that when the filtering time reaches a set value, the PLC 9 controls the device to enter the cleaning process, and after the cleaning is finished according to the set cleaning time, the device enters the filtering process.
The invention solves the technical problem that various process waters such as power plant desulfurization slurry, desulfurization wastewater, circulating water blowdown water, pickling wastewater, ash sluicing water, coal-containing wastewater and the like can not be directly monitored and analyzed on line, greatly improves the measurement accuracy of the water sample analyzer, prolongs the service life of the water sample analyzer, reduces the workload of analysis and analysis personnel, and improves the working efficiency and the accuracy of analysis and analysis.
Claims (9)
1. An automatic filtering device for process water in a power plant is characterized by comprising a water sample inlet pipeline, a water sample inlet valve (1), an inlet pressure gauge (2), an equipment main body (3), a filter screen (4), a water sample outlet valve (5), a flushing sprayer (6), a flushing water inlet valve (7), a blow-down valve (8) and a PLC (programmable logic controller) (9);
the water sample inlet pipeline is communicated with a water inlet on the side surface of the equipment main body (3) through a water sample inlet valve (1), and the inlet pressure gauge (2) is positioned on the water sample inlet pipeline between the water sample inlet valve (1) and the equipment main body (3); the water sample outlet valve (5) is communicated with a clear liquid outlet at the upper part of the equipment main body (3), and the filter screen (4) is arranged in the equipment main body (3) and is positioned above the water inlet of the equipment main body (3) and below the water sample outlet valve (5); the blow-down valve (8) is positioned at the bottom of the equipment main body (3), and the blow-down valve (8) is communicated with a blow-down port at the bottom of the equipment main body (3); the outlet of the flushing water pipeline is communicated with a flushing nozzle (6) in the equipment main body (3) through a flushing water inlet valve (7); the water sample inlet valve (1), the inlet pressure gauge (2), the water sample outlet valve (5), the flushing water inlet valve (7) and the blow-down valve (8) are connected with the PLC (programmable logic controller) through data lines.
2. The automatic filtering device for the process water in the power plant according to claim 1, characterized in that the switches of the water sample inlet valve (1), the water sample outlet valve (5), the flushing nozzle (6), the flushing water inlet valve (7) and the blowdown valve (8) can be switched on and off by a PLC (programmable logic controller) (9) according to a set control program and can be switched on and off manually.
3. The automatic filtration plant process water filtration unit according to claim 1, characterized in that the blow-off valve (8) is a regulating valve or a switch valve.
4. The automatic filtering device for power plant process water according to claim 1, characterized in that the flushing nozzles (6) are mounted on the top of the apparatus body (3).
5. The automatic filter device for power plant process water according to claim 1, characterized in that the equipment body (3) is divided into an upper structure and a lower structure, wherein the upper structure and the lower structure are connected by a flange, and the filter screen (4) is positioned between the upper structure and the lower structure.
6. The automatic filtering method for the power plant process water is characterized in that the automatic filtering device for the power plant process water based on claim 1 comprises a filtering process and a cleaning process;
the filtering process comprises the following steps: the process water of the power plant enters the equipment main body (3) through the water sample inlet valve (1), filtrate is discharged through the water sample outlet valve (5) after being filtered by the filter screen (4), and the pressure of the process water pipeline is monitored through the inlet pressure gauge (2);
the cleaning process comprises the following steps: according to the signal of the inlet pressure gauge (2) acquired by the PLC (9) or the preset filtering time, when the pressure of the inlet pressure gauge (2) is greater than a set value or the filtering time reaches the set value, the washing water automatically enters the washing nozzle (6) from the washing water inlet valve (7), the washing nozzle (6) sprays the washing water to the filter screen (4) to clean the filter screen (4), and the washing water is discharged from the blow-down valve (8).
7. The automatic filtering method for power plant process water according to claim 6, characterized in that the PLC (9) controls the filtering process and the cleaning process to be alternately performed according to a set program or controls the filtering process and the cleaning process to be alternately performed by manual operation.
8. The automatic filtering method for the process water of the power plant according to the claim 6, characterized in that, during the filtering process, the water sample inlet valve (1) and the water sample outlet valve (5) are opened, and the flushing nozzle (6), the flushing water inlet valve (7) and the blowdown valve (8) are closed; during the cleaning process, the water sample inlet valve (1) and the water sample outlet valve (5) are closed, and the flushing nozzle (6), the flushing water inlet valve (7) and the drain valve (8) are opened.
9. The automatic filtering method for the process water of the power plant according to the claim 6, characterized in that the control program set by the PLC (9) is a pressure feedback control program, a time feedback control program or a simultaneous control of pressure feedback and time feedback, wherein the pressure feedback control program is that when the pressure of the inlet pressure gauge (2) is larger than a set value, the control device of the PLC (9) enters a cleaning process, and after the cleaning is finished according to a set cleaning time, the filtering process is entered; the time feedback control program is that when the filtering time reaches a set value, the PLC (9) controls the device to enter the cleaning process, and after the cleaning is finished according to the set cleaning time, the device enters the filtering process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201829.9A CN115518440A (en) | 2022-09-29 | 2022-09-29 | Automatic filtering device and method for process water of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201829.9A CN115518440A (en) | 2022-09-29 | 2022-09-29 | Automatic filtering device and method for process water of power plant |
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| Publication Number | Publication Date |
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| CN115518440A true CN115518440A (en) | 2022-12-27 |
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| CN202211201829.9A Pending CN115518440A (en) | 2022-09-29 | 2022-09-29 | Automatic filtering device and method for process water of power plant |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205379713U (en) * | 2016-03-16 | 2016-07-13 | 朱加平 | Full -automatic positive back flush filtration system of bathroom circulating water |
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- 2022-09-29 CN CN202211201829.9A patent/CN115518440A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205379713U (en) * | 2016-03-16 | 2016-07-13 | 朱加平 | Full -automatic positive back flush filtration system of bathroom circulating water |
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