CN113200629A

CN113200629A - Flotation device and water body purification integrated system

Info

Publication number: CN113200629A
Application number: CN202110671458.XA
Authority: CN
Inventors: 李建康; 梁思懿
Original assignee: Capital Engineering & Research Incorporation Ltd
Current assignee: Capital Engineering & Research Incorporation Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-08-03

Abstract

The invention provides a flotation device and an integrated system for water purification, which relates to the field of environmental protection equipment for sewage treatment. A flocculant is added to the sewage to be flocculated, and a slag scraper is installed on the top of the air flotation tank to scrape off the flocs floating on the surface of the sewage. The invention provides a flotation device and an integrated system for water purification, which can scrape off the sludge in the sewage and purify the quality of the sewage.

Description

Flotation device and water body purification integrated system

Technical Field

The invention relates to the field of sewage treatment environment-friendly equipment, in particular to a flotation device and a water body purification integrated system.

Background

The water in the urban river is affected by the daily life of the coastal residents and the production of enterprises, is often polluted and needs to be treated by sewage treatment equipment.

The water body in the urban river is influenced by the daily life of the residents on the shore, and may contain quite high Biochemical Oxygen Demand (BOD), Total Suspended Solids (TSS) and high-concentration grease. At present, when the water body is treated by adopting the traditional water treatment method, the situations that the sludge flocculation effect is not ideal and flocs are difficult to sink often occur.

In view of the above, the inventor designs a flotation device and a water body purification integrated system through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.

Disclosure of Invention

The invention provides a flotation device and a water body purification integrated system, which can scrape sludge in sewage completely and purify the quality of the sewage.

In order to achieve the above purpose, the present invention provides a flotation device, wherein the flotation device at least comprises an air flotation tank, a scum scraper and a chemical feeder, sewage to be flocculated is stored in the air flotation tank, the chemical feeder adds a flocculating agent into the sewage to be flocculated, and the scum scraper is installed on the top of the air flotation tank and scrapes flocs floating up to the surface of the sewage.

The flotation device as described above, wherein the doser is a tubular doser.

The flotation device as described above, wherein the flotation device further includes an air conveyor that injects pressurized air into the flotation tank.

The invention also provides a water body purification integrated system, which comprises a pretreatment device, a flotation device and a sludge treatment device which are sequentially connected in series, wherein the pretreatment device is used for removing fixed substances in sewage to enable the sewage to become the sewage to be flocculated, the flotation device is the flotation device, and the sludge treatment device is used for dewatering flocculates discharged by the flotation device.

As above water purifies integrated system, wherein, preprocessing device is including holding accent pond, elevator pump, rotary drum grid, equalizing tank and feed pump, the elevator pump sets up hold in the accent pond, the elevator pump rotary drum grid equalizing tank with the feed pump passes through the raceway and establishes ties in proper order, the elevator pump will hold the sewage in the accent pond through the rotary drum grid carry extremely in the equalizing tank, the feed pump will sewage in the equalizing tank promotes to the air supporting pond.

The integrated water purification system as described above, wherein the lift pump is a variable frequency submersible pump.

The integrated water purification system as described above, wherein the sludge treatment device comprises a sludge storage tank, a sludge screw pump and a sludge dewatering machine, which are connected in series in sequence, the sludge storage tank is connected with the scum scraper and collects the flocculates discharged from the scum scraper, the sludge screw pump conveys the flocculates in the sludge storage tank to the sludge dewatering machine, and the sludge dewatering machine dewaters the flocculates.

The water body purification integrated system is characterized in that the sludge dewatering machine is a stacked screw type sludge dewatering machine.

The water body purification integrated system further comprises a control element, wherein level meters are respectively arranged in the air flotation tank, the storage and adjustment tank, the equalization tank and the sludge storage tank, and the level meters, the feeding pump, the lifting pump and the sludge screw pump are respectively electrically connected with the control element.

The integrated water body purification system comprises a liquid level control module and a central control module, wherein each liquid level meter is electrically connected with the liquid level control module, the liquid level control module is electrically connected with the central control module, and the feeding pump, the lifting pump and the sludge screw pump are respectively electrically connected with the central control module.

Compared with the prior art, the invention has the following characteristics and advantages:

the flotation device and the water body purification integrated system provided by the invention can scrape flocculate on the water surface completely by using the slag scraper, so that the treatment effect on the sewage containing high-concentration grease components is good, and the flotation device and the water body purification integrated system are particularly suitable for treating black and odorous water bodies in urban riverways and treating industrial sewage containing a large amount of grease components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.

FIG. 1 is a schematic view of the flotation apparatus of the present invention;

fig. 2 is a schematic structural diagram of the water purification integrated system of the present invention.

Description of reference numerals:

10. a flotation device; 11. An air floatation tank;

12. a slag scraper; 13. A medicine adding device;

20. a pretreatment device; 21. A storage and adjustment tank;

22. a lift pump; 23. A drum grid;

24. a balancing tank; 26. A water delivery pipe;

30. a sludge treatment device; 31. A sludge storage tank;

33. a sludge dewatering machine; 100. Water purifies integrated system.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.

As shown in fig. 1 and 2, the present invention provides a flotation device 10, the flotation device 10 at least includes an air flotation tank 11, a scum scraper 12 and a chemical feeder 13, sewage to be flocculated is stored in the air flotation tank 11, the chemical feeder 13 adds a flocculating agent into the air flotation tank 11, and the scum scraper 12 is installed on the top of the air flotation tank 11 and scrapes flocs floating up to the surface of the sewage.

The invention also provides a water body purification integrated system 100, the water body purification integrated system 100 comprises a pretreatment device 20, a flotation device 10 and a sludge treatment device 30 which are sequentially connected in series, the pretreatment device 20 removes fixed substances in sewage to enable the sewage to become sewage to be flocculated, and the sludge treatment device 30 carries out dehydration treatment on flocculates scraped out by the flotation device 10.

The flotation device 10 and the water purification integrated system 100 provided by the invention can scrape flocculate which is difficult to sink off by the slag scraper 12, so as to further improve the purified water quality.

The flotation device 10 and the water purification integrated system 100 provided by the invention can scrape flocculates on the water surface completely by using the slag scraper 12, so that the treatment effect on sewage containing high-concentration grease components is good, and the device is particularly suitable for treating black and odorous water in urban rivers and treating industrial sewage containing a large amount of grease components.

In an alternative embodiment of the present invention, the chemical feeder 13 is a tubular chemical feeder which utilizes the kinetic energy of water flow to mix chemicals on-line, so that sewage and flocculant are formed into flocs rapidly.

In an alternative embodiment of the invention, the flotation device 10 further comprises an air conveyor which injects pressurized air into the flotation tank 11. The air conveyor injects pressurized air into the air flotation tank 11 to generate a saturated air/water mixture, and the buoyancy is increased rapidly after the combination of larger solids and flocculates in the sewage and the micro-bubbles, so that the sewage quickly floats to the water surface to form a sludge layer.

In an alternative embodiment of the present invention, the pretreatment device 20 includes a storage and adjustment tank 21, a lift pump 22, a rotary drum grid 23, an equalization tank 24 and a feed pump, the lift pump 22 is disposed in the storage and adjustment tank 21, the lift pump 22, the rotary drum grid 23, the equalization tank 24 and the feed pump are connected in series in sequence through a water pipe, and the lift pump 22 lifts the sewage in the storage and adjustment tank 21 to the equalization tank 24 through the rotary drum grid 23. The main function of the pretreatment device 20 is to pretreat the sewage to remove large solid particles from the sewage. Specifically, the sewage to be treated is lifted to an equalization tank 24 by a lift pump 22 in the storage tank 21, during which the sewage is passed through a rotary drum grid 23. The drum grating 23 can remove large solid particles in the sewage to prevent large solids such as inorganic fragments from continuously entering the equalizing tank 24 and the floatation tank 11, thereby preventing the rotary equipment and the pipeline from being damaged or blocked. The equalization tank 24 is used for storing the pretreated sewage and preparing for entering the floatation tank 11 next step, and the feed pump lifts the pretreated sewage in the equalization tank 24 to the floatation tank 11 of the floatation device 10.

In an alternative example of this embodiment, the lift pump 22 is a variable frequency submersible pump.

In an alternative example of this embodiment, the storage tank 21 may also be a sump.

In an alternative example of this embodiment, the sludge treatment apparatus 30 includes a sludge storage tank 31, a sludge screw pump and a sludge dewatering machine 33 connected in series in sequence, the sludge storage tank 31 is connected to the scum scraper 12 and collects flocs (muddy water) discharged from the scum scraper 12, the sludge screw pump conveys the flocs (muddy water) in the sludge storage tank 31 to the sludge dewatering machine 33, the sludge dewatering machine 33 can dewater the flocs rapidly, and the solid sludge separated from the flocs is conveyed out, so that labor cost and transportation cost are saved, and the purposes of energy saving and environmental protection are achieved.

In an alternative example, sludge dewatering machine 33 is a stacked screw sludge dewatering machine.

In an optional example of the present invention, the integrated water purification system 100 further includes a control element, wherein level meters are respectively disposed in the air flotation tank 11, the storage and adjustment tank 21, the equalization tank 24, and the sludge storage tank 31, and each of the level meters, the lift pump 22, the feed pump, and the sludge screw pump is respectively electrically connected to the control element.

In an alternative example, the control unit has a liquid level control module and a central control module (PLC), and the liquid level control module can feed back a liquid level signal to the central control module according to the liquid level in the flotation tank 11 of the flotation device 10, so as to control the start and stop of the feeding pump. The central PLC control module can also instruct the doser 13 to adjust the dosage of a proper medicament (flocculant) according to the sewage feeding flow, so as to ensure the water quality of the effluent.

Referring to fig. 1 and fig. 2, the specific operation process of the flotation device and the water purification integrated system according to the present invention will be described in detail with reference to an embodiment:

the sewage to be treated is lifted by a lifting pump 22 in the storage and adjustment tank 21, large solid particles are removed by a rotary drum grating 23 in the process, and then the sewage enters an equalizing tank 24 and is lifted to the air flotation tank 11 by a feeding pump.

The tubular chemical feeder 13 mixes chemical substances on line by utilizing the kinetic energy of water flow, so that flocculated sewage and a flocculating agent quickly form flocs.

The air conveyor injects pressurized air into the air flotation tank 11 to generate a saturated air/water mixture, and the buoyancy is increased rapidly after the combination of larger solids and flocculates in the sewage and the micro-bubbles, so that the sewage quickly floats to the water surface to form a sludge layer.

The clean treated water flows out of the weir, and the sludge layer is removed by the system of the slag scraper 12 and collected in the sludge storage tank 31, and is periodically introduced into the sludge dewatering machine 33 by the sludge screw pump for sludge-water separation.

The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.

Claims

1. A flotation device, characterized in that the flotation device at least comprises an air flotation tank, a slag scraper and a dosing device, and the air flotation tank stores sewage to be flocculated, and the dosing device supplies the A flocculant is added to the flocculated sewage, and the scraper is installed on the top of the air flotation tank to scrape off the flocs floating on the surface of the sewage.

2. The flotation device according to claim 1, wherein the dosing device is a tubular dosing device.

3 . The flotation device according to claim 1 , wherein the flotation device further comprises an air conveyor, and the air conveyor injects pressurized air into the air flotation tank. 4 .

4. An integrated system for water purification, characterized in that the integrated system for water purification comprises a pretreatment device, a flotation device and a sludge treatment device that are connected in series, and the pretreatment device removes the fixed substances in the sewage to make it a For the sewage to be flocculated, the flotation device is the flotation device according to any one of claims 1 to 3, and the sludge treatment device performs dehydration treatment on the flocs discharged from the flotation device .

5. The integrated system for water purification according to claim 4, wherein the pretreatment device comprises a storage tank, a lift pump, a drum grid, an equalization tank and a feed pump, and the lift pump is arranged at the In the storage and adjustment tank, the lift pump, the drum grille, the equalization tank and the feed pump are connected in series through a water delivery pipe, and the lift pump sends the sewage in the storage and adjustment tank through the rotating drum. The grid is transported into the equalization tank, and the feed pump lifts the sewage in the equalization tank to the air flotation tank.

6 . The integrated system for water purification according to claim 5 , wherein the lift pump is a frequency conversion submersible water pump. 7 .

7 . The integrated system for water purification according to claim 5 , wherein the sludge treatment device comprises a sludge storage tank, a sludge screw pump and a sludge dewatering machine connected in series, and the sludge storage tank is connected to a sludge dewatering machine. 8 . The scraper is connected to collect the flocs discharged from the scraper, and the sludge screw pump transports the flocs in the sludge storage tank to the sludge dewatering machine. The sludge dewatering machine dewaters the flocs.

8 . The integrated water purification system according to claim 7 , wherein the sludge dewatering machine is a screw-stacked sludge dewatering machine. 9 .

9 . The integrated system for water purification according to claim 7 , wherein the integrated system for water purification further comprises a control element, in the air flotation tank, in the storage and adjustment tank, in the equalization tank and in the sewage. 10 . A liquid level gauge is respectively arranged in the mud storage tank, and the liquid level gauge, the feed pump, the lift pump and the sludge screw pump are respectively electrically connected with the control element.

10. The integrated system for water purification according to claim 9, wherein the control element comprises a liquid level control module and a central control module, each of the liquid level gauges is electrically connected to the liquid level control module, and the The liquid level control module is electrically connected to the central control module, and the feed pump, the lift pump and the sludge screw pump are respectively electrically connected to the central control module.