CN108328774A - A kind of high efficient aeration sedimentation integrated device - Google Patents

Abstract

The invention belongs to water-treatment technology fields, more particularly, to a kind of high efficient aeration sedimentation integrated device.The present invention uses micro-pore ceramic aerator, the water of dissolved air water need not be compared to accurately require with matching for gas, it is particularly suitable for the seawater cleaning processing of different turbidity, full-range preprocessing process can be provided for Seawater Desalination Project, the turbidity of handling result can reach 3 10 NTU or less；Multiple deflectors are arranged in the present invention in aeration zone, form repeatedly aeration, increase the time of contact of suspended matter and bubble, be conducive to suspended matter in water being effectively separated, treatment effeciency is high；Multi-functional block is used in combination in high efficient aeration sedimentation integrated device provided by the present invention, and aeration, air supporting, precipitation are incorporated into one, compact-sized, and flocculation dosage is low, and flow is simple, and operating cost and energy consumption save, and also a save the cost of investment of equipment.

Description

A high-efficiency aeration and sedimentation integrated device

technical field

The invention belongs to the technical field of water treatment, and in particular relates to an integrated high-efficiency aeration and sedimentation device.

Background technique

The shortage of water resources in our country has become one of the important factors restricting the sustainable development of society and economy. Seawater desalination technology is an effective means to solve the problem of shortage of fresh water resources in our country. The reverse osmosis seawater desalination process has the advantages of low equipment investment, low energy consumption, and short construction period. It has developed rapidly in recent years and has increasingly become the leading technology for seawater desalination. The primary problem of reverse osmosis seawater desalination project is seawater pretreatment. The operation status of pretreatment process is directly related to the operating cost of reverse osmosis seawater desalination project and the service life of reverse osmosis membrane.

Conventional seawater pretreatment generally adopts flocculation reaction sedimentation tank process. However, the quality of seawater not only fluctuates greatly with the seasons, but also is affected by the tides twice a day in the morning and evening. The turbidity of seawater usually fluctuates within a wide range, reflecting that the effluent quality of the sedimentation tank cannot be stabilized for a long time within a reasonable range, which increases the follow-up The operating load of the membrane treatment system increases the frequency of membrane cleaning and shortens the service life. Therefore, it is imperative to develop a reliable new seawater pretreatment process.

Air flotation water purification technology is a solid-liquid separation technology developed rapidly in the past 30 years. Its principle is to dissolve air into water under pressure, and then release the air under decompression to generate a large number of tiny bubbles. Particle interactions, including complex processes such as adsorption, flocculation, and hydrodynamics. Make the bubbles adhere to the suspended particles to form a mixture with an overall specific gravity of less than 1. Because the buoyancy is greater than the gravity, the mixture floats to the water surface and forms scum, and the clear water flows downward to collect the scum and clear water separately, thereby achieving solid-liquid separation. . In the field of water treatment, air flotation water purification technology is widely used at home and abroad.

The air flotation sedimentation tank is a device for water treatment and purification. It uses dissolved air water containing micro-bubbles to combine with tiny particles in the raw water to form foam flocs and floats up to the surface of the raw water. Finally, the pollution floating on the water surface is removed by scraping equipment. The waste is collected into the slag tank, so as to achieve the purpose of purifying water quality. Among them, some particles with a large specific gravity in the raw water will sink to the bottom of the pool for collection under the action of gravity. The impact of turbulent flow and broken, thus reducing the purification effect of raw water.

Contents of the invention

In view of the above-mentioned shortcomings, the object of the present invention is to design a microporous ceramic aeration-sedimentation integrated device with a new structure. This treatment device can be used in small and medium-sized water treatment systems. It is economical and practical, and can meet the requirements of water treatment with different turbidities. It is especially used in the pretreatment of seawater desalination projects. It can provide the whole process of pretreatment process, and the treatment effect is remarkable.

For this reason, above-mentioned purpose of the present invention is achieved through the following technical solutions:

A high-efficiency aeration-sedimentation integrated device, the high-efficiency aeration-sedimentation integrated device includes a body, the body is provided with a water inlet and a water outlet, and the body is located between the water inlet and the water outlet. area, air flotation sedimentation area, inclined plate sedimentation area, clear water collection area and clear water overflow area; The areas are connected, the inclined plate sedimentation area is connected with the clear water collection area set above it, and the clear water collection area is connected with the clear water overflow area set above it; the aeration area is connected with the water inlet, and the clear water The overflow area is connected with the water outlet; multiple aeration devices are arranged in the aeration area.

While adopting the above-mentioned technical solution, the present invention can also adopt or adopt the following further technical solutions in combination:

Preferably, the multiple aeration device includes a plurality of first V-shaped flaps, the first V-shaped flaps are arranged at the bottom of the high-efficiency aeration-sedimentation integrated device, and any two adjacent first V-shaped flaps A deflector is arranged between the folded plates, and the deflector divides the space in the aeration zone along the horizontal direction.

Preferably, a first sewage outlet is provided at the bottom of the aeration area, and the first sewage outlet is located in the space surrounded by the first V-shaped flap

Preferably, a microporous ceramic aerator is provided in the space separated by the deflector, and the microporous ceramic aerator communicates with the air intake pipe.

Preferably, the upper end of the microporous ceramic aerator is at the same height as the water inlet.

Preferably, an inclined baffle is set between the air flotation sedimentation area and the aeration area, and the end of the inclined baffle away from the water inlet is fixed on the high-efficiency aeration and sedimentation integrated device, and the end of the inclined baffle near the water inlet One end forms an opening with the inner wall of the high-efficiency aeration-sedimentation integrated device, and the height of this end is higher than the end away from the water inlet; the air flotation sedimentation area is provided with a scum discharge port near the lower end of the inclined baffle.

Preferably, a perforated pipeline is provided in the inclined plate sedimentation area, a plurality of water outlet holes are provided on the side wall of the perforated pipeline, and a second sewage outlet is provided below the perforated pipeline; above the perforated pipeline A sloping plate is provided, and the sloping plate is arranged obliquely along the reverse direction of the water flow. A primary sedimentation space is formed between the sloping plate and the perforated pipeline. A clear water collection area is arranged above the sloping plate, and the clear water collection area forms It is the secondary precipitation space.

Preferably, a plurality of second V-shaped flaps are arranged under the perforated pipe, and vertical baffles are arranged between any two adjacent second V-shaped flaps, and the vertical baffles are arranged along the horizontal The direction separates the space in the inclined plate settling area.

Preferably, a clear water overflow weir is provided on the outer edge of the clear water overflow area, and a water outlet is provided outside the clear water overflow weir in the clear water overflow area.

Preferably, a partition plate is provided between the aeration area, the air flotation sedimentation area and the inclined plate sedimentation area, the clear water collection area and the clear water overflow area, and the separation plate is between the aeration area and the inclined plate sedimentation area. A water outlet is provided at the corresponding position, and the water outlet communicates with the perforated pipeline.

The invention provides a high-efficiency aeration-sedimentation integrated device, which has the following beneficial effects:

(1) The present invention uses a microporous ceramic aerator, which does not require precise requirements for the ratio of water and air in dissolved air water, and is especially suitable for seawater purification treatment with different turbidity, and can provide a whole-process solution for seawater desalination projects. During the pretreatment process, the turbidity of the treatment result can reach below 3-10 NTU;

(2) In the present invention, a plurality of deflectors are set in the aeration area, and its function is to make the raw water and suspended matter form upward potential energy in the previous aeration area, when the raw water and suspended matter rise to the top When it falls to the next aeration area, the fine air bubbles formed by the microporous ceramic aerator in the aeration area against the direction of the water flow will make the suspended matter continue to float upward; so many times of aeration will increase the amount of suspended matter and air bubbles The contact time is long, which is conducive to the effective separation of suspended solids in water, and the treatment efficiency is high;

(3) The high-efficiency aeration-sedimentation integrated device provided by the present invention uses multi-functional blocks in combination, which combines aeration, air flotation, and sedimentation into one body. It has a compact structure, low flocculation dosage, simple process, and low operating costs and energy consumption. Consumption is low, and the investment cost of equipment is also saved.

Description of drawings

Fig. 1 is the overall schematic diagram of the high-efficiency aeration-sedimentation integrated device provided by the present invention;

Fig. 2 is the left view of the high-efficiency aeration-sedimentation integrated device provided by the present invention;

In the figure: 100-body; 101-water inlet; 102-water outlet; 103-partition plate; 104-water outlet; 110-aeration area; 111-first V-shaped folding plate; 113-deflector; 114-microporous ceramic aerator; 115-intake pipe; 120-air flotation sedimentation area; 121-inclined baffle; Hole pipe; 132-second sewage outlet; 133-sloping plate; 134-second V-shaped folding plate; 135-vertical baffle; 140-clear water collection area; 150-clear water overflow area; 151-clear water overflow weir .

Detailed ways

The present invention is described in further detail with reference to the accompanying drawings and specific embodiments.

With reference to accompanying drawing 1 and 2, the flow direction of water flow is shown in Fig. 1; High-efficiency aeration sedimentation integrated device comprises body 100, is provided with water inlet 101 and water outlet 102 on body 100, is located in water inlet 101 and outlet in body 100 An aeration area 110, an air flotation sedimentation area 120, an inclined plate sedimentation area 130, a clear water collection area 140 and a clear water overflow area 150 are arranged between the water outlets 102; The aeration area 110 is connected to the inclined plate sedimentation area 130 arranged on its side, the inclined plate sedimentation area 130 is connected to the clear water collection area 140 arranged above it, and the clear water collection area 140 is connected to the clear water overflow area 150 arranged above it; The gas zone 110 is connected with the water inlet 101, and the clear water overflow zone 150 is connected with the water outlet 102; the aeration zone 110 is provided with multiple aeration devices.

The multiple aeration device includes a plurality of first V-shaped flaps 111, and the first V-shaped flaps 111 are arranged at the bottom of the high-efficiency aeration-sedimentation integrated device, between any two adjacent first V-shaped flaps 111 A deflector 113 is provided, and the deflector 113 divides the space in the aeration zone 110 along the horizontal direction.

The working principle of the present invention: add raw water with flocculant, enter the aeration area from the water inlet of the device, and fully mix and contact the gas and suspended matter on the surface of the microporous ceramic aerator, gradually forming sufficient adsorption of suspended particles, Continue to form loose flocculent suspensions in the air flotation sedimentation area to float up and collect, and the scum is discharged from the scum discharge port, and the water flow enters the inclined plate sedimentation area to separate the solid and liquid in the reverse flow of the inclined plate sedimentation, and the sediment is discharged from the second sewage outlet , the settled water enters the clear water overflow area after being clarified from the clear water collection area, and flows out from the water outlet of the overflow area through the overflow.

The present invention is divided into five areas in terms of functions, which are an aeration area, an air flotation sedimentation area, an inclined plate sedimentation area, a clear water collection area and a clear water overflow area. The aeration area has two air inlets to ensure the full mixing and adsorption contact of the gas and solid phase in the water body where the flocculant is added; the inclined plate sedimentation area uses the inclined plate reverse flow to settle the sediment and other solid phases that are difficult to be removed by air flotation It is separated from the liquid phase; the clear water collection area collects the settled clear water for further clarification; the clear water overflow area adopts a long channel ascending overflow method, which can save the floor area and ensure the quality of the effluent water. The whole device has compact structure, less flocculation agent consumption, simple process, low operating cost and energy consumption.

The above specific embodiments are used to explain the present invention, and are only preferred embodiments of the present invention, rather than limiting the present invention. Within the spirit of the present invention and the protection scope of the claims, any modification, equivalent replacement, Improvements and the like all fall within the protection scope of the present invention.

Claims (10)

1. a kind of high efficient aeration sedimentation integrated device, which is characterized in that the high efficient aeration sedimentation integrated device includes this Body, the ontology are equipped with inlet and outlet, aeration zone, gas are equipped between inlet and outlet in the ontology Floating settling zone, sloping plate deposition district, clear water collecting region and clean water overflow area；The air supporting settling zone that the aeration zone is arranged with its top It is connected, the aeration zone is connected with the sloping plate deposition district that its side is arranged, and the sloping plate deposition district is arranged with its top Clear water collecting region is connected, and the clear water collecting region is connected with the clean water overflow area that its top is arranged；The aeration zone with into The mouth of a river is connected, and the clean water overflow area is connected with water outlet；Multiple aerator is equipped in the aeration zone.

2. high efficient aeration sedimentation integrated device according to claim 1, which is characterized in that the multiple aerator packet Multiple first v-shaped folded plates are included, first v-shaped folded plate is arranged in the bottom of high efficient aeration sedimentation integrated device, any two Deflector is equipped between the first adjacent v-shaped folded plate, the deflector separates the space in aeration zone along horizontal direction.

3. high efficient aeration sedimentation integrated device according to claim 2, which is characterized in that aeration zone bottom is equipped with first Sewage draining exit, first sewage draining exit are located in the space that the first v-shaped folded plate is surrounded.

4. high efficient aeration sedimentation integrated device according to claim 2, which is characterized in that the deflector was separated Micro-pore ceramic aerator is equipped in space, the micro-pore ceramic aerator is connected with air inlet pipe.

5. high efficient aeration sedimentation integrated device according to claim 4, which is characterized in that the micro-pore ceramic aerator Upper end it is concordant with the height of water inlet.

6. high efficient aeration sedimentation integrated device according to claim 1, which is characterized in that the air supporting settling zone and exposure Sloping baffle is set between gas area, and the one end of the sloping baffle far from water inlet is fixed on high efficient aeration sedimentation integrated device On, the sloping baffle forms opening and the end close to the madial wall of one end of water inlet and high efficient aeration sedimentation integrated device Height is higher than one end far from water inlet；It is discharged equipped with dross in the lower adjacent one end of sloping baffle the air supporting settling zone Mouthful.

7. high efficient aeration sedimentation integrated device according to claim 1, which is characterized in that set in the sloping plate deposition district There are perforated tube, the perforated tube side wall to be equipped with multiple apopores, the second sewage draining exit is equipped with below the perforated tube；Institute It states and is equipped with inclined plate above perforated tube, the inclined plate is obliquely installed along the reverse direction of flow, the inclined plate and perforated tube Between form primary sedimentation space, be equipped with clear water collecting region above the inclined plate, the clear water collecting region is formed as secondary precipitation Space.

8. high efficient aeration sedimentation integrated device according to claim 7, which is characterized in that set below the perforated tube Have multiple second v-shaped folded plates, be equipped with vertical baffle between the second adjacent v-shaped folded plate of any two, the vertical baffle along Horizontal direction separates the space in sloping plate deposition district.

9. high efficient aeration sedimentation integrated device according to claim 1, which is characterized in that outside the clean water overflow area Edge is equipped with clean water overflow weir, and the outside on clean water overflow weir is equipped with water outlet in the clean water overflow area.

10. high efficient aeration sedimentation integrated device according to claim 1, which is characterized in that the aeration zone, air supporting are heavy Demarcation strip is equipped between shallow lake area and sloping plate deposition district, clear water collecting region and clean water overflow area, the demarcation strip is in aeration zone and tiltedly The corresponding position of plate settling zone was equipped with the mouth of a river, and the mouth of a river of crossing is connected with perforated tube.