CN107935087B - Full-automatic air floatation control system and control method - Google Patents
Full-automatic air floatation control system and control method Download PDFInfo
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- CN107935087B CN107935087B CN201711313509.1A CN201711313509A CN107935087B CN 107935087 B CN107935087 B CN 107935087B CN 201711313509 A CN201711313509 A CN 201711313509A CN 107935087 B CN107935087 B CN 107935087B
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- 238000000034 method Methods 0.000 title abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000005188 flotation Methods 0.000 claims abstract description 45
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 3
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 239000008394 flocculating agent Substances 0.000 abstract description 17
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000004090 dissolution Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- 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
-
- 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
- C02F2209/03—Pressure
-
- 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
- C02F2209/38—Gas flow rate
-
- 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
- C02F2209/40—Liquid flow rate
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- 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)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a full-automatic air floatation control system and a control method. The system comprises: the device comprises an air flotation tank, a dissolved air tank, an air storage tank, a skimming device, a flocculating agent feeding pipe, a water inlet pipe and a water drain pipe; a dissolved air pump is arranged between the air flotation tank and the dissolved air tank, water in the air flotation tank is conveyed to the dissolved air tank through the dissolved air pump for air dissolution, the water after air dissolution is output to the water inlet pipe from the outlet of the dissolved air tank and enters the air flotation tank together with the water input to the air flotation tank; a plurality of control points are arranged in the system, and are in cascade control connection, and the control points control the system to realize monitoring and automatic adjustment of the quality of the effluent of the vapor flotation; the operation monitoring is not affected by weather and light.
Description
The technical field is as follows:
the invention relates to the technical field of water treatment systems and methods, in particular to a full-automatic air floatation control system and a full-automatic air floatation control method.
Background art:
a lot of waste water is generated in the paper making industry, the waste water can be discharged after being treated, and a conventional water treatment device adopted at present is an air flotation device.
The working principle of the air floatation device is as follows: air is introduced into the sewage to generate fine bubbles, so that fine suspended matters in the water are adhered to the air bubbles and float to the water surface together with the bubbles to form scum, and then the scum is skimmed by a skimming device, so that the purposes of removing the suspended matters in the water and improving the water quality are achieved. In order to increase the purification effect, a certain amount of flocculant is usually put into the sewage, and the added flocculant promotes the coagulation of suspended matters so that the suspended matters adhere to bubbles to float upwards; the flotation agent can be added to convert the surface of the hydrophilic particles into hydrophobic substances which are adhered to the bubbles and float upwards along with the bubbles.
At present, the air floatation device has the following defects: the quality of the discharged water cannot be monitored on line and cannot be automatically adjusted; when the treatment capacity needs to be adjusted, a plurality of parameters such as the flocculating agent amount and the compressed air amount need to be adjusted simultaneously, and the effluent quality is easy to fluctuate by adopting a manual adjustment mode at present. In addition, the existing air floatation device needs manual detection for adjusting air pressure, dissolving air effect and whether the skimming device is abnormal, so that the labor intensity is high, the water quality is fluctuated, and the water treatment effect is influenced
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a full-automatic air floatation control system and a full-automatic air floatation control method.
In order to solve the technical problems, the full-automatic air floatation control system adopts the following technical scheme: a fully automatic air flotation control system, the system comprising: the device comprises an air flotation tank, a dissolved air tank for carrying out air dissolving operation on water in the air flotation tank, an air storage tank communicated with the dissolved air tank and supplying air to the dissolved air tank, a skimming device arranged on the air flotation tank, a flocculating agent feeding pipe for feeding flocculating agent into the air flotation tank through a flocculating agent feeding pump, a water inlet pipe for inputting water into the air flotation tank through a feeding pump, and a water outlet pipe for outputting water overflowing from the air flotation tank outwards; a dissolved air pump is arranged between the air flotation tank and the dissolved air tank, water in the air flotation tank is conveyed to the dissolved air tank through the dissolved air pump for air dissolution, the water after air dissolution is output to the water inlet pipe from the outlet of the dissolved air tank and enters the air flotation tank together with the water input to the air flotation tank; in the above system, the following control points are provided and make cascade control connection, and the control points include: the control point A is arranged on the drain pipe and used for detecting the concentration of the drained water; the control point B is arranged on the water inlet pipe and is used for controlling the flow of inlet water; a control point C arranged on the flocculant feeding pipe and used for controlling the flow of the flocculant; a control point D arranged between the air storage tank and the dissolved air tank and used for controlling the flow rate of the compressed air; a control point E arranged between the dissolved air pump and the dissolved air tank and used for controlling the inflow of the dissolved air; the variable frequency motor is arranged in the skimming device and used for driving the skimming device to operate, and the variable frequency motor is used as a control point F; and the control point G is arranged at the air inlet of the air storage tank and is used for controlling the pressure of the air storage tank.
Further, in the above technical solution, the control point a is a concentration transmitter.
Further, in the above technical solution, the control point B is a flow transmitter and a regulating valve.
Further, in the above technical solution, the control point C is a flow transmitter.
Further, in the above technical solution, the control point D is a flow transmitter and a regulating valve.
Further, in the above technical solution, the control point E is a flow transmitter and a regulating valve.
Further, in the above technical solution, the control point G is a pressure transmitter and an air compressor for inputting compressed air to the air storage tank.
Further, in the above technical solution, a control point H for controlling the back pressure of the dissolved air tank is provided between the dissolved air tank and the water inlet pipe; the control point H is a pressure transmitter and a control valve, and the backpressure of the dissolved air tank is controlled to be maintained at a set value through the control point H.
Further, in the above technical solution, the air flotation tank is further provided with a liquid level transmitter.
Further, in the above technical solution, the system adopts the following control method: the control point A, B, C, D, E, F, G is connected in cascade control and is set as follows: when the concentration displayed by the control point A is greater than the set concentration, adjusting a variable frequency motor of the control point F to increase the slag discharge amount in an increasing mode at the speed of 10% per minute until the concentration of the point A is less than or equal to the set concentration; when the rotating speed of the variable frequency motor of the control point F is increased to 100%, the concentration detected by the control point A is still larger than the set concentration, the regulating valve in the control point B is regulated to reduce the feeding flow rate by 10 cubic meters per hour every 5 minutes and decrease the feeding flow rate, meanwhile, the control point C, D, E is automatically reduced according to the set proportion with the control point B, until the water inflow in the air flotation tank is 80% of the rated water inflow, an alarm is given out to prompt an operator to increase the feeding speed of a flocculating agent feeding pump at the control point C, the respective regulating valves in the control point D, E are regulated to increase the feeding speed until the detected concentration of the control point A is qualified, and the alarm is eliminated; in the case where the concentration displayed at the control point a is less than the set concentration, when it is necessary to increase the throughput of the control point B, the control point C, D, E, F automatically increases the flow rate and the rotation speed in accordance with the set ratio to the control point B; two interlocked air compressors are adopted in the control point G, one air compressor is used as a standby air compressor, and when the pressure of the air storage tank is lower than the set pressure, the standby air compressor is automatically started; and when the pressure is higher than the set pressure, stopping the standby air compressor.
The working process of the air floatation device is as follows: water to be treated enters the water inlet pipe through the feeding pump after passing through the flowmeter, and enters the steam floating tank after being mixed with a certain amount of flocculating agent fed into by the flocculating agent feeding pipe, the water in the steam floating tank is pumped by the dissolved air pump and is sent to the dissolved air tank to be dissolved with compressed air, the water after being dissolved enters the water inlet pipe again, and is mixed with the inlet water to enter the steam floating tank, tiny bubbles rise together in the rising process of the steam floating tank, and the adhesion of the tiny bubbles is formed by flocculating agent and light impurities, and then the light impurities on the liquid surface are removed through the skimming device. The treated water below the liquid level overflows and then enters the drain pipe to continuously flow outwards.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: the control system is provided with a plurality of control points, the control points are in cascade control connection, and the control points control the system to realize monitoring and automatic adjustment of the quality of the vapor-floated effluent; the operation monitoring is not affected by weather and light.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, the present invention is a full-automatic air-floating control system, which comprises: the device comprises an air flotation tank 1, a dissolved air tank 2, an air storage tank 3, a skimming device 4, a flocculating agent feeding pipe 5, a water inlet pipe 6 and a water discharge pipe 7. In fig. 1, the solid line portion is connected by a pipe, and the dotted line portion is connected by a circuit.
The air supporting groove 1 and dissolve and be provided with a dissolved air pump 21 between the gas pitcher 2, carry the water in the air supporting groove 1 to dissolve gas pitcher 2 through dissolved air pump 21 and dissolve gas, water after dissolving gas is exported to inlet tube 6 by the export of dissolving gas pitcher 2, gets into in the air supporting groove 1 together with the water of inlet tube 6.
The gas storage tank 3 is communicated with the dissolved gas tank 2, and high-pressure gas is input into the dissolved gas tank 2 through the gas storage tank 3. An air compressor 31 is connected to an air inlet of the air tank 3, and high-pressure gas is input into the air tank 3 through the air compressor 31.
The skimming device 4 is arranged on the air flotation groove 1, the skimming device 4 adopts the existing skimming device, the cart is controlled by the cart motor to rotate around the air flotation groove, and the skimming spoon is controlled by the cart motor to rotate to remove impurities on the liquid level. The treated water flows through overflow to the drain pipe 7.
A flocculating agent feeding pump 51 is arranged at the starting end of the flocculating agent feeding pipe 5 to feed flocculating agent into the air floatation tank 1; the water inlet pipe 6 inputs water to be treated into the air flotation tank 1 through a feed pump 61. The water after the air dissolving is output to a water inlet pipe 6 from an outlet of the air dissolving tank 2 and enters the air floating groove 1 together with the water of the water inlet pipe 6;
in the above system, the following control points are provided and make cascade control connection, and the control points include:
the setting is in drain pipe 7 on, be used for detecting the control point A of drainage concentration, control point A be concentration transmitter a1, whether reach standard through this concentration transmitter a1 detection exhaust water concentration, realize real-time on-line measuring quality of water.
And the control point B is arranged on the water inlet pipe 6 and is used for controlling the flow of inlet water, and the control point B is a flow transmitter B1 and a regulating valve B2. Flow transmitter b1 is used for the inflow flow of real-time detection inlet tube 6, and governing valve b2 adopts electrical control valve, can adjust inflow flow size as required.
The control point C is arranged on the flocculant feeding pipe 5 and used for controlling the flow of the flocculant, the control point C is a flow transmitter C1, and the dosing amount of the flocculant is detected in real time through the flow transmitter C1.
A control point D arranged between the air storage tank 3 and the dissolved air tank 2 and used for controlling the flow of the compressed air; the control point D is a flow transmitter D1 and a regulating valve D2.
A control point E arranged between the dissolved air pump 21 and the dissolved air tank 2 and used for controlling the inflow of the dissolved air; the control point E is a flow transmitter E1 and a regulating valve E2. The flow transmitter e1 detects the amount of water input into the dissolved air tank 2, and the flow is electrically adjusted and controlled by the adjusting valve e 2.
The variable frequency motor is arranged in the skimming device 4 and used for driving the skimming device 4 to operate, and the variable frequency motor is used as a control point F;
and a control point G arranged at the air inlet of the air storage tank 3 and used for controlling the pressure of the air storage tank 3. The control point G is a pressure transmitter G1 and an air compressor 31 for inputting compressed air into the air storage tank 3. Here, two air compressors 31 are provided, one of which serves as a backup.
A control point H for controlling the back pressure of the dissolved air tank 2 is arranged between the dissolved air tank 2 and the water inlet pipe 6; the control point H is a pressure transmitter H1 and a control valve H2, so as to detect the back pressure of the dissolved gas tank 2 and adjust the flow rate of the dissolved gas liquid, that is, the back pressure of the dissolved gas tank 2 is controlled to be maintained at a set value through the control point H.
In addition, a liquid level transmitter 11 is also arranged on the air flotation tank 1.
The working process of the air floatation device is as follows: water that needs to handle gets into inlet tube 6 through material loading pump 61 behind the flowmeter to a certain amount of flocculating agent that sends into with flocculating agent inlet pipe 5 mixes the back and gets into vapour flotation tank 1, the water that dissolves the air pump 21 extraction vapour flotation tank 1 the inside is sent to and is dissolved gas with dissolved air 2, water after dissolving the gas reentries inlet tube 6, mix with the inflow and get into vapour flotation tank, tiny bubble rises together at the rising in-process adhesion of vapour flotation tank wadding group that comprises flocculating agent and light impurity, the rethread skimming device 4 gets rid of the light impurity of liquid level. The treated water below the liquid level overflows and then enters the drain pipe 7 to flow outwards continuously.
The control method comprises the following steps: the control point A, B, C, D, E, F, G, H is cascade-connected and set as follows:
when the concentration displayed by the control point A is greater than the set concentration, adjusting a variable frequency motor of the control point F to increase the slag discharge amount in an increasing mode at the speed of 10% per minute until the concentration of the point A is less than or equal to the set concentration; when the rotating speed of the variable frequency motor of the control point F is increased to 100%, the concentration detected by the control point A is still larger than the set concentration, the regulating valve in the control point B is regulated to reduce the feeding flow rate by 10 cubic meters per hour every 5 minutes and gradually decrease, meanwhile, the control point C, D, E automatically decreases according to the set proportion with the control point B, until the water inflow in the air flotation tank 1 is 80% of the rated water inflow, an alarm is given out to prompt an operator to increase the feeding speed of the flocculating agent feeding pump 51 at the control point C, the regulating valves in the control point D, E are regulated to increase the feeding speed until the detected concentration of the control point A is qualified, and the alarm is eliminated at the moment.
In the case where the concentration is shown to be less than the set concentration at control point a, when it is necessary to increase the throughput at control point B, control point C, D, E, F automatically increases the flow rate and rotation speed in accordance with the set ratio to control point B.
Two interlocked air compressors 31 are adopted in the control point G, one of the air compressors is used as a standby air compressor, and when the pressure of the air storage tank 3 is lower than the set pressure (3 BAR in the embodiment), the standby air compressor is automatically started; and when the pressure is higher than the set pressure, stopping the standby air compressor.
The control point H sets the back pressure at 100KPA, and is controlled by the control valve H2 to maintain the best air dissolving effect.
In addition, a slow switch 12 can be installed beside the running track in the skimming device 4 for online monitoring of the running status of the skimming device 4. The operation of the middle and large trolleys of the skimming device 4 is monitored through two slow switches, and the continuous deslagging is ensured.
The control system is provided with a plurality of control points, the control points are in cascade control connection, and the control points control the system to realize monitoring and automatic adjustment of the quality of the vapor-floated effluent; the operation monitoring is not affected by weather and light.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313509.1A CN107935087B (en) | 2017-12-12 | 2017-12-12 | Full-automatic air floatation control system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313509.1A CN107935087B (en) | 2017-12-12 | 2017-12-12 | Full-automatic air floatation control system and control method |
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| Publication Number | Publication Date |
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| CN107935087A CN107935087A (en) | 2018-04-20 |
| CN107935087B true CN107935087B (en) | 2021-02-19 |
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| CN201711313509.1A Expired - Fee Related CN107935087B (en) | 2017-12-12 | 2017-12-12 | Full-automatic air floatation control system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108974951B (en) * | 2018-07-16 | 2023-08-18 | 玖龙纸业(重庆)有限公司 | Stacking machine |
| CN114288884B (en) * | 2021-12-14 | 2022-12-09 | 广东万家乐燃气具有限公司 | Microbubble generating device with gas storage chamber and water heater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006035042A1 (en) * | 2004-09-28 | 2006-04-06 | KOWITEC Ingenieurgesellschaft für Wassertechnik mbH | Device and method for purifying waste water |
| CN203038062U (en) * | 2013-01-11 | 2013-07-03 | 佛山市海天调味食品股份有限公司 | Continuous automatic reagent feeding control system of air floatation machine |
| CN203255994U (en) * | 2013-04-03 | 2013-10-30 | 北京北排水务设计研究院有限公司 | Efficient automatic air-floating mud scraper control device of air floating tank |
| CN103984367A (en) * | 2014-05-11 | 2014-08-13 | 甘肃金桥给水排水设计与工程(集团)有限公司 | Automatic air flotation filtering tank liquid level control system |
| CN104909490A (en) * | 2015-05-19 | 2015-09-16 | 东风活塞轴瓦有限公司 | Phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and automated device |
| CN107324482A (en) * | 2017-07-11 | 2017-11-07 | 西安建筑科技大学 | Efficient automatic slag discharge device and method in a kind of ozone air-float technique |
-
2017
- 2017-12-12 CN CN201711313509.1A patent/CN107935087B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006035042A1 (en) * | 2004-09-28 | 2006-04-06 | KOWITEC Ingenieurgesellschaft für Wassertechnik mbH | Device and method for purifying waste water |
| CN203038062U (en) * | 2013-01-11 | 2013-07-03 | 佛山市海天调味食品股份有限公司 | Continuous automatic reagent feeding control system of air floatation machine |
| CN203255994U (en) * | 2013-04-03 | 2013-10-30 | 北京北排水务设计研究院有限公司 | Efficient automatic air-floating mud scraper control device of air floating tank |
| CN103984367A (en) * | 2014-05-11 | 2014-08-13 | 甘肃金桥给水排水设计与工程(集团)有限公司 | Automatic air flotation filtering tank liquid level control system |
| CN104909490A (en) * | 2015-05-19 | 2015-09-16 | 东风活塞轴瓦有限公司 | Phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and automated device |
| CN107324482A (en) * | 2017-07-11 | 2017-11-07 | 西安建筑科技大学 | Efficient automatic slag discharge device and method in a kind of ozone air-float technique |
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