CN115432766A - Method for controlling pressure of flotation tank - Google Patents
Method for controlling pressure of flotation tank Download PDFInfo
- Publication number
- CN115432766A CN115432766A CN202211218659.5A CN202211218659A CN115432766A CN 115432766 A CN115432766 A CN 115432766A CN 202211218659 A CN202211218659 A CN 202211218659A CN 115432766 A CN115432766 A CN 115432766A
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- China
- Prior art keywords
- flotation tank
- liquid level
- water
- tank
- inlet pipe
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- 238000005188 flotation Methods 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000003889 chemical engineering Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Classifications
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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
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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 method for controlling the pressure of a flotation tank, wherein exhaust pipelines at the top parts of different flotation tanks are inserted into different liquid levels in the same water seal tank, and for the flotation tanks with different liquid levels, the depth difference value of the water surfaces inserted into the water seal tanks is equal to the liquid level difference value of the corresponding flotation tank.
Description
Technical Field
The invention relates to the technical field of chemical engineering and environmental protection, in particular to a method for controlling the pressure of a flotation tank.
Background
In chemical engineering and wastewater treatment, a flotation tank is often used. Most of the prior art are normal pressure flotation tanks, and some are positive pressure flotation tanks. Most positive pressure flotation tanks are at the same water level, or the water levels of different flotation tanks are controlled independently, so that the flotation tanks with different pressures or elevations in a set of system cannot be controlled well, the series flow of water discharged from different tank bodies can be easily caused, the liquid level is unstable or not in accordance with the design purpose, and even at least part of the flotation tanks cannot work normally.
Disclosure of Invention
In order to realize the control of the positive pressure flotation tanks with different elevations in the same system, the invention provides a method for controlling the pressure in the flotation tank, which is a method for controlling the pressure of the flotation tank, and has the advantages of simple structure, stable operation and low cost.
The technical scheme adopted by the invention is as follows: the device comprises a complete set of flotation tanks consisting of flotation tanks and flotation tank water inlet pipes with different liquid levels and heights, flotation tank dissolved air inlet pipes, flotation tank water outlet pipes and a flotation tank pressure control device, wherein a higher high liquid level flotation tank and a lower low liquid level flotation tank with a relative liquid level height difference H1 respectively enter water through the high liquid level flotation tank water inlet pipe and the low liquid level flotation tank water inlet pipe, respectively enter dissolved air through the high liquid level flotation tank dissolved air inlet pipe and the low liquid level flotation tank dissolved air inlet pipe, respectively exhaust through the high liquid level flotation tank exhaust pipe and the low liquid level flotation tank exhaust pipe, respectively insert the high liquid level flotation tank exhaust pipe and the low liquid level flotation tank exhaust pipe below the water surface of a water-sealed tank, the high liquid level flotation tank exhaust pipe is inserted into the water surface of the water-sealed tank to a shallower depth, the low liquid level flotation tank exhaust pipe is inserted into the water surface of the water-sealed tank to a deeper depth, and the depth difference value H2 is approximately equal to the difference value H1.
The invention has the advantages of simple structure, stable operation and low cost.
The present invention is described in further detail below with reference to the attached drawing figures.
Drawings
FIG. 1 is an embodiment of the present invention;
wherein, (1) the high liquid level flotation cell; (2) a low liquid level flotation tank; (3) water sealing the tank; (4) exhausting pipes of the high liquid level flotation tank; (5) exhausting pipes of the low liquid level flotation tank; (11) a dissolved air inlet pipe of the high liquid level flotation tank; (12) a dissolved air inlet pipe of the low liquid level flotation tank; (13) a water inlet pipe of the high liquid level flotation tank; (14) a water inlet pipe of the low liquid level flotation tank; (15) a water outlet pipe of the low liquid level flotation tank; (16) a water outlet pipe of the high liquid level flotation tank; (17) water seal tank vent pipe.
Detailed Description
For the purpose of promoting an understanding of the invention, reference will now be made in detail to the embodiments illustrated in the drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the whole set of flotation tank is composed of a flotation tank with different liquid levels and different heights, a flotation tank water inlet pipe, a flotation tank dissolved air inlet pipe, a flotation tank water outlet pipe and a flotation tank pressure control device, and is characterized in that: the high liquid level flotation tank (1) and the low liquid level flotation tank (2) with the relative liquid level height difference H1 respectively enter water through a high liquid level flotation tank water inlet pipe (13) and a low liquid level flotation tank water inlet pipe (14), respectively enter dissolved air water through a high liquid level flotation tank air inlet pipe (11) and a low liquid level flotation tank air inlet pipe (12), respectively exhaust through a high liquid level flotation tank exhaust pipe (4) and a low liquid level flotation tank exhaust pipe (5), respectively insert below the water surface of a water-sealed tank (3) through the high liquid level flotation tank exhaust pipe (4) and the low liquid level flotation tank exhaust pipe (5), respectively insert shallow depth below the water surface of the water-sealed tank through the high liquid level flotation tank exhaust pipe, deep below the water surface of the water-sealed tank through the low liquid level flotation tank exhaust pipe, and the depth difference is H2.
Along with the sudden reduction of the pressure of the dissolved air water entering the pool, the air in the dissolved air water is released into the water to form small bubbles which rise above the liquid level, and the process is the common air-float dissolved air release process. The contaminants are floated off in the form of scum during this process. The free gas released in the invention is conveyed into the water surface of the water-sealed tank through the high-liquid-level flotation tank exhaust pipe (4) and the low-liquid-level flotation tank exhaust pipe (5) because of the sealing of the tank body, and then overflows out of the water surface of the water-sealed tank in a bubble form and is discharged to the outside through the water-sealed tank exhaust pipe (17). The water released from the dissolved air water and the water entering through the high liquid level flotation tank water inlet pipe (13) and the low liquid level flotation tank water inlet pipe (14) respectively go out through the low liquid level flotation tank water outlet pipe (15) and the high liquid level flotation tank water outlet pipe (16) in the high liquid level flotation tank and the low liquid level flotation tank. When the liquid level difference H1 between the high liquid level flotation tank and the low liquid level flotation tank, and the depth difference H2 between the exhaust pipe of the high liquid level flotation tank and the exhaust pipe of the low liquid level flotation tank inserted under the water surface of the water-sealed tank are equal, the pressure of the liquid flowing out of the water outlet pipe of the low liquid level flotation tank is the same as that of the liquid flowing out of the water outlet pipe of the high liquid level flotation tank, so that the pressure of the water outlet pipe of each flotation tank is the same when the flotation tanks with different liquid levels are connected in parallel for working, and the liquid cannot flow between the flotation tanks with different liquid levels. Thus, the liquid levels of different flotation tanks can be accurately controlled by a simple structure.
The number of flotation cells described in the above embodiments is merely for convenience of illustration and not for limitation, which does not narrow the scope of the invention. The water-sealed tank described in the above embodiment is a sealed tank body, which is merely for convenience of illustration and is not limiting, and the actual water-sealed tank may also be an open container, which does not narrow the protection scope of the invention. The water inlet pipe and the air inlet pipe described in the above embodiments are separated for convenience of illustration only and are not limited, and the water inlet pipe and the air inlet pipe may be the same device in practice, which does not narrow the protection scope of the present invention.
Claims (1)
1. A method for controlling the pressure of a flotation tank comprises the flotation tank with different liquid levels and heights, a flotation tank water inlet pipe, a flotation tank air inlet pipe, a flotation tank water outlet pipe and a flotation tank pressure control device, and is characterized in that: a high liquid level flotation tank (1) and a low liquid level flotation tank (2) with a relative liquid level height difference H1 respectively enter water through a high liquid level flotation tank water inlet pipe (13) and a low liquid level flotation tank water inlet pipe (14), respectively enter dissolved air water through a high liquid level flotation tank air inlet pipe (11) and a low liquid level flotation tank air inlet pipe (12), respectively exhaust through a high liquid level flotation tank exhaust pipe (4) and a low liquid level flotation tank exhaust pipe (5), respectively insert the high liquid level flotation tank exhaust pipe (4) and the low liquid level flotation tank exhaust pipe (5) below the water surface of a water-sealed tank (3), the depth of the high liquid level flotation tank exhaust pipe inserted below the water surface of the water-sealed tank is shallow, the depth of the low liquid level flotation tank exhaust pipe inserted below the water surface of the water-sealed tank is deep, and the depth difference H2 is equal to the difference H1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211218659.5A CN115432766A (en) | 2022-10-06 | 2022-10-06 | Method for controlling pressure of flotation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211218659.5A CN115432766A (en) | 2022-10-06 | 2022-10-06 | Method for controlling pressure of flotation tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115432766A true CN115432766A (en) | 2022-12-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211218659.5A Pending CN115432766A (en) | 2022-10-06 | 2022-10-06 | Method for controlling pressure of flotation tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115432766A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341633A (en) * | 1974-10-17 | 1982-07-27 | Linde Aktiengesellschaft | Surface aeration system with controlled aerator submergence |
| CN102297163A (en) * | 2010-06-23 | 2011-12-28 | 北京银万特科技有限公司 | Water pumping device and method for U-shaped channel |
| CN107777792A (en) * | 2017-10-26 | 2018-03-09 | 上海市政工程设计研究总院（集团）有限公司 | A kind of inclined floor partial pressure aeration tank |
| CN110282729A (en) * | 2019-08-02 | 2019-09-27 | 上海铸奇环保科技有限公司 | A kind of Pneumatic controller |
| CN110745942A (en) * | 2019-10-30 | 2020-02-04 | 苏州红昇环保科技有限公司 | Automatic anaerobic three-phase separation system and control method |
-
2022
- 2022-10-06 CN CN202211218659.5A patent/CN115432766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341633A (en) * | 1974-10-17 | 1982-07-27 | Linde Aktiengesellschaft | Surface aeration system with controlled aerator submergence |
| CN102297163A (en) * | 2010-06-23 | 2011-12-28 | 北京银万特科技有限公司 | Water pumping device and method for U-shaped channel |
| CN107777792A (en) * | 2017-10-26 | 2018-03-09 | 上海市政工程设计研究总院（集团）有限公司 | A kind of inclined floor partial pressure aeration tank |
| CN110282729A (en) * | 2019-08-02 | 2019-09-27 | 上海铸奇环保科技有限公司 | A kind of Pneumatic controller |
| CN110745942A (en) * | 2019-10-30 | 2020-02-04 | 苏州红昇环保科技有限公司 | Automatic anaerobic three-phase separation system and control method |
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Application publication date: 20221206 |
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| WD01 | Invention patent application deemed withdrawn after publication |