CN110606617A - Sewage treatment distributed control system - Google Patents
Sewage treatment distributed control system Download PDFInfo
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- CN110606617A CN110606617A CN201810618148.XA CN201810618148A CN110606617A CN 110606617 A CN110606617 A CN 110606617A CN 201810618148 A CN201810618148 A CN 201810618148A CN 110606617 A CN110606617 A CN 110606617A
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- sewage treatment
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- grid
- reaction tank
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- 239000010865 sewage Substances 0.000 title claims abstract description 77
- 239000010802 sludge Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 22
- 230000018044 dehydration Effects 0.000 claims description 17
- 238000006297 dehydration reaction Methods 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 239000010813 municipal solid waste Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a sewage treatment distributed control system, which comprises a master operator station, a slave operator station, a pretreatment area PLC, a reaction tank area PLC and a sewage treatment area PLC; the main operator station is connected with the auxiliary operator station through configuration software; the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are respectively connected with the master operator station and the slave operator station. The invention adopts SBR method, namely sequence intermittent activated sludge process, which is used for a sewage treatment system of a refuse landfill to realize automatic control of sewage treatment system equipment and monitoring and adjustment of equipment state; the upper computer is a master operator station and a slave operator station, and two PCs are used as backups for each other, so that the stability of the system can be improved; the sewage treatment system is mainly divided into three areas, each area realizes the automatic control of the field device through the PLC respectively, and the sewage treatment system can adapt to the harsh working environment and can also ensure the working stability.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment distributed control system.
Background
The main process parameter indexes of sewage treatment comprise Suspended Solids (SS) and Total Oxygen Demand (TOD). In general, two indexes of Suspended Solids (SS) and biochemical oxygen demand (BOD5) are strictly controlled by secondary sewage treatment plants, and are used as main indexes of effluent water quality. The index Suspended Solids (SS) refers to the concentration of suspended particles in the influent or effluent. SS is one of the existing forms (colloidal matter, dissolved matter) of the substances in water. Biochemical Oxygen Demand (BOD) the amount of free oxygen consumed by aerobic microorganisms to oxidatively break down organic matter in a unit volume of water under aerobic conditions is expressed in milligrams per liter of oxygen (O2, mg/l).
The sewage treatment plant generally sets up thick, thin twice grid and intercepts the rubbish of different size respectively, because the design reason of thick grid fails normal operating since the water-passing, lead to all rubbish in the sewage to rely on 12 drum-type thin grids to intercept, therefore the actual load of thin grid far exceeds the design value, especially rainy day, the rubbish volume in the sewage increases several times in the short time, not only make the grid net block up easily and cause the sewage to overflow, make thin grid spiral delivery main shaft fracture because of the overload still, the main shaft of 12 thin grids all breaks down. The thin grating frequently has main shaft fracture faults, and the main reasons are as follows: after long-time operation, the fine grid body deforms, the lower copper shaft sleeve is seriously abraded, and the gap between the slag scraping rake teeth and the grid bars is changed, so that the slag scraping rake teeth and the grid bars form friction, mechanical failure is caused, and garbage cannot be scraped cleanly; the garbage amount is large, the load is large, the garbage can not be completely and timely transported out by the spiral main shaft in one operation period and is accumulated around the main shaft, and when the thin grating is automatically started again, the torsion moment of the main shaft is too large, so that the main shaft is broken.
Disclosure of Invention
Technical problem to be solved
In view of the above-mentioned problems of the prior art, the present invention provides a distributed sewage treatment control system, which is applied to a sewage treatment system of a refuse landfill by using an SBR process, i.e., a sequential batch activated sludge process, and realizes automatic control of sewage treatment system equipment and monitoring and adjustment of equipment status.
(II) technical scheme
A sewage treatment distributed control system comprises a coarse grid sewage remover, a first lifting pump, a fine grid sewage remover, a sedimentation tank, a second lifting pump, an SBR reaction tank, a residual sludge pump, a sludge tank, a concentration and dehydration integrated machine and a water storage tank; the coarse grid sewage remover is connected with a sewage system through a water inlet pipeline, and the coarse grid sewage remover is connected with the fine grid sewage remover through a first lifting pump; the fine grid dirt removing machine is connected with the SBR reaction tank through a sedimentation tank and a second lifting pump; the SBR reaction tank is connected with a concentration and dehydration integrated machine through a residual sludge pump and a sludge tank, and sludge treated by the concentration and dehydration integrated machine is sent to a sludge processing plant; the SBR reaction tank is also connected with a user through a water storage tank.
According to an embodiment of the present invention, the control system includes a master operator station, a slave operator station, a pretreatment area PLC, a reaction tank area PLC, a sewage treatment area PLC; the main operator station is connected with the auxiliary operator station through configuration software; the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are respectively connected with a master operator station and a slave operator station; the pretreatment area PLC is respectively connected with the coarse grating, the fine grating and the sedimentation tank; the reaction tank zone comprises a stirrer, an air blower, a return sludge pump, a residual sludge pump and a sensor, wherein the stirrer, the air blower, the return sludge pump, the residual sludge pump and the sensor are respectively connected with the reaction tank PLC; the sewage treatment area comprises a sludge feeding pump, a concentration and dehydration integrated machine, a conveyor, a PH meter and a liquid level meter, wherein the sludge feeding pump, the concentration and dehydration integrated machine, the conveyor, the PH meter and the liquid level meter are respectively connected with a PLC of the sewage treatment area.
According to an embodiment of the invention, the coarse grid comprises a grid dirt separator, a grid slag conveyor, a squeezer, a liquid level meter, a water inlet valve and a liquid level difference meter, and the grid dirt separator, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively connected with the pretreatment area PLC.
According to an embodiment of the invention, the fine grid comprises a grid dirt separator, a grid slag conveyor, a squeezer, a liquid level meter, a water inlet valve and a liquid level difference meter, and the grid dirt separator, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively connected with the pretreatment area PLC.
According to an embodiment of the invention, the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are Siemens PLC, and the Siemens PLC is S7-400.
(III) advantageous effects
By adopting the technical scheme of the invention, the sewage treatment distributed control system adopts an SBR (sequencing batch reactor) process, namely a sequential intermittent activated sludge process, is used for a sewage treatment system of a refuse landfill, and realizes automatic control of sewage treatment system equipment and monitoring and adjustment of equipment states; the upper computer is a master operator station and a slave operator station, and two PCs are used as backups for each other, so that the stability of the system can be improved; the sewage treatment system is mainly divided into three areas, namely a pretreatment area, a reaction tank area and a sludge treatment area, wherein each area realizes the automatic control of field equipment through a PLC respectively, so that the sewage treatment system can adapt to the harsh working environment and can also ensure the working stability.
Drawings
In the present invention, like reference numerals refer to like features throughout, wherein:
FIG. 1 is a process diagram of a control system according to the present invention;
FIG. 2 is a block diagram of a control system according to the present invention;
FIG. 3 is a block diagram of a coarse grid assembly;
fig. 4 is a block diagram of a fine grid assembly.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1, a distributed control system for sewage treatment comprises a coarse grid sewage disposal machine, a first lift pump, a fine grid sewage disposal machine, a sedimentation tank, a second lift pump, a SBR reaction tank, a residual sludge pump, a sludge tank, a concentration and dehydration integrated machine and a water storage tank. The coarse grid sewage remover is connected with a sewage system through a water inlet pipeline, and the coarse grid sewage remover is connected with the fine grid sewage remover through a first lifting pump; the fine grid dirt removing machine is connected with the SBR reaction tank through a sedimentation tank and a second lifting pump; the SBR reaction tank is connected with a concentration and dehydration integrated machine through a residual sludge pump and a sludge tank, and sludge treated by the concentration and dehydration integrated machine is sent to a sludge processing plant; the SBR reaction tank is also connected with a user through a water storage tank.
The coarse grid dirt remover and the fine grid dirt remover are used for filtering impurities in water; the sedimentation tank is mainly used for adjusting water quality and preparing the reaction in the SBR reaction tank; the sedimentation tank, the reaction tank and the sludge treatment tank are matched with some related auxiliary equipment and sensors. Firstly, sewage enters a sewage treatment system through a main pipeline. The sewage is firstly filtered by the coarse grating to remove larger impurities, and then is conveyed to the sedimentation tank by the second lifting pump after being filtered by the fine grating to remove smaller impurities. And then, adjusting the water quality in the sedimentation tank to prepare for the next treatment of the SBR reaction tank. And pumping the sewage into the SBR reaction tank by a second lifting pump for dephosphorization and denitrification treatment. And after the reaction is finished, taking out the supernatant of the upper layer, and allowing the supernatant to pass through a water storage tank for a user to use. And one part of sludge at the bottom of the SBR reaction tank returns to the SBR reaction tank through a residual sludge pump, and the other part of sludge is conveyed to the sludge tank and the concentration and dehydration integrated machine to manufacture a mud cake.
Referring to fig. 2, the distributed control system for sewage treatment comprises a master operator station, a slave operator station, a pretreatment area PLC, a reaction tank area PLC, and a sewage treatment area PLC; the main operator station is connected with the auxiliary operator station through configuration software; the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are respectively connected with the master operator station and the slave operator station. The pretreatment area comprises a coarse grating, a fine grating and a sedimentation tank, and the pretreatment area PLC is respectively connected with the coarse grating, the fine grating and the sedimentation tank. Referring to fig. 3, the coarse grid comprises a grid cleaner, a grid slag conveyor, a squeezer, a level meter, a water inlet valve and a level difference meter, and the grid cleaner, the grid slag conveyor, the squeezer, the level meter, the water inlet valve and the level difference meter are respectively connected with the PLC of the pretreatment area. Referring to fig. 4, the fine grid comprises a grid cleaner, a grid slag conveyor, a squeezer, a level meter, a water inlet valve and a level difference meter, and the grid cleaner, the grid slag conveyor, the squeezer, the level meter, the water inlet valve and the level difference meter are respectively connected with the PLC of the pretreatment area. The reaction tank zone comprises a stirrer, an air blower, a return sludge pump, a residual sludge pump and a sensor, wherein the stirrer, the air blower, the return sludge pump, the residual sludge pump and the sensor are respectively connected with the reaction tank PLC. The sewage treatment area comprises a sludge feeding pump, a concentration and dehydration integrated machine, a conveyor, a PH meter and a liquid level meter, wherein the sludge feeding pump, the concentration and dehydration integrated machine, the conveyor, the PH meter and the liquid level meter are respectively connected with a PLC of the sewage treatment area.
The sewage treatment system is mainly divided into three areas, namely a pretreatment area, a reaction tank area and a sludge treatment area, wherein the pretreatment area mainly realizes a mechanical treatment stage, filters larger impurities and simultaneously adjusts water quality, and the pretreatment area mainly comprises a coarse grating, a fine grating and the automatic control of main process equipment of a sedimentation tank. The reaction tank area is mainly used in the biochemical treatment stage and automatically controls the SBR reaction tank process equipment. The sludge treatment area is mainly used for treating sludge generated by water treatment and comprises a conveyor, a concentration and dehydration integrated machine and automatic control of water inlet and outlet valves. Three PLCs are adopted as lower computers to realize the control of field equipment, and the PLCs can adapt to the harsh working environment and can also ensure the working stability. The pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are Siemens PLC which is S7-400.
The upper computer is a master operator station and a slave operator station, two PCs are used as backup for each other, one PC is used as a master monitoring machine, and the other PC is used as a slave monitoring machine. When a problem occurs at the main operator station, the main operator station can be immediately switched to another station as the main operator station. When the main operator station is repaired, the main operator station can be switched back to the main operator station, and the stability of the system can be improved.
The fine grid dirt remover consists of a screen basket, a spray washing water pipe, a screen basket cleaning brush, a collecting funnel, an outer screwed pipe and a conveying screw rod. When the device works, the driving screw shaft rotates to drive the grid basket to rotate, garbage in sewage is filtered by the grid basket and then is intercepted in the grid basket, the garbage is brought to the upper part of the slag inlet basket by the rotating grid basket, washed by the washing device and then enters the slag basket, and the garbage is lifted by the spiral body and then is conveyed out of the machine. The biggest improvement of the fine grid structure is that the garbage is separated by adopting a screen mesh of a rotary outer ring and then is transported out by a spiral main shaft inside.
In order to avoid the frequent main shaft fracture fault of the fine-grid dirt separator: vertical reinforcing rib plates are arranged on the panel of the fine grid body, so that the deformation resistance is improved; the control system is modified, a frequency conversion device is added, and the original direct starting mode is changed into frequency conversion starting, so that the starting torque can be reduced, and the main shaft is protected; the spiral main shaft is thickened, and the pipe wall is thickened, so that the load capacity of the main shaft is improved. By enhancing the daily maintenance force and increasing the manual inspection frequency, the machine should be stopped for inspection immediately when abnormal friction sound is found, so that the hidden danger is eliminated in time and the occurrence of large faults is avoided; run into rainy day, clear up the interior rubbish of thin grid in advance manually to look the intake pump and turn on the pump condition, in time beat the thin grid to manual operation mode, make rubbish in time clear up, avoid storing up and cause the start-up difficulty. In operation, the starting of the frequency conversion device is a very good mode, and economic conditions allow the full implementation in the future fine grid modification.
In summary, by adopting the technical scheme of the invention, the sewage treatment distributed control system in the embodiment of the invention adopts an SBR (sequencing batch reactor) method, namely a sequential intermittent activated sludge process, and is used for a sewage treatment system of a refuse landfill to realize automatic control of sewage treatment system equipment and monitoring and adjustment of equipment states; the upper computer is a master operator station and a slave operator station, and two PCs are used as backups for each other, so that the stability of the system can be improved; the sewage treatment system is mainly divided into three areas, namely a pretreatment area, a reaction tank area and a sludge treatment area, wherein each area realizes the automatic control of field equipment through a PLC respectively, so that the sewage treatment system can adapt to the harsh working environment and can also ensure the working stability.
It should be understood by those skilled in the art that the above embodiments are for illustrative purposes only and are not intended to limit the present invention, and that changes and modifications to the above embodiments may fall within the scope of the appended claims.
Claims (5)
1. The utility model provides a sewage treatment distributed control system which characterized in that: comprises a coarse grid sewage remover, a first lifting pump, a fine grid sewage remover, a sedimentation tank, a second lifting pump, an SBR reaction tank, a residual sludge pump, a sludge tank, a concentration and dehydration integrated machine and a water storage tank; the coarse grid sewage remover is connected with a sewage system through a water inlet pipeline, and the coarse grid sewage remover is connected with the fine grid sewage remover through a first lifting pump; the fine grid dirt removing machine is connected with the SBR reaction tank through a sedimentation tank and a second lifting pump; the SBR reaction tank is connected with a concentration and dehydration integrated machine through a residual sludge pump and a sludge tank, and sludge treated by the concentration and dehydration integrated machine is sent to a sludge processing plant; the SBR reaction tank is also connected with a user through a water storage tank.
2. The distributed sewage treatment control system of claim 1, wherein: the control system comprises a main operator station, a slave operator station, a pretreatment area PLC, a reaction tank area PLC and a sewage treatment area PLC; the main operator station is connected with the auxiliary operator station through configuration software; the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are respectively connected with a master operator station and a slave operator station; the pretreatment area PLC is respectively connected with the coarse grating, the fine grating and the sedimentation tank; the reaction tank zone comprises a stirrer, an air blower, a return sludge pump, a residual sludge pump and a sensor, wherein the stirrer, the air blower, the return sludge pump, the residual sludge pump and the sensor are respectively connected with the reaction tank PLC; the sewage treatment area comprises a sludge feeding pump, a concentration and dehydration integrated machine, a conveyor, a PH meter and a liquid level meter, wherein the sludge feeding pump, the concentration and dehydration integrated machine, the conveyor, the PH meter and the liquid level meter are respectively connected with a PLC of the sewage treatment area.
3. The distributed sewage treatment control system of claim 2, wherein: the coarse grating comprises a grating dirt separator, a grating slag conveyor, a squeezer, a liquid level meter, a water inlet valve and a liquid level difference meter, and the grating dirt separator, the grating slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively connected with the PLC in the pretreatment area.
4. The distributed sewage treatment control system of claim 2, wherein: the fine grid comprises a grid dirt separator, a grid slag conveyor, a squeezer, a liquid level meter, a water inlet valve and a liquid level difference meter, and the grid dirt separator, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively connected with the PLC in the pretreatment area.
5. The distributed sewage treatment control system of claim 2, wherein: the pretreatment area PLC, the reaction tank PLC and the sewage treatment area PLC are Siemens PLC, and the Siemens PLC is S7-400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618148.XA CN110606617A (en) | 2018-06-15 | 2018-06-15 | Sewage treatment distributed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618148.XA CN110606617A (en) | 2018-06-15 | 2018-06-15 | Sewage treatment distributed control system |
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| CN110606617A true CN110606617A (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810618148.XA Pending CN110606617A (en) | 2018-06-15 | 2018-06-15 | Sewage treatment distributed control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488933A (en) * | 2022-01-26 | 2022-05-13 | 南京工程学院 | Sewage treatment control system based on thing networking remote monitering terminal |
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2018
- 2018-06-15 CN CN201810618148.XA patent/CN110606617A/en active Pending
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| CN103399544A (en) * | 2013-07-24 | 2013-11-20 | 张运泉 | Automatic control method for urban sewage treatment and control system thereof |
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