CN201292263Y

CN201292263Y - Vertical flow type aerobic gas float filter chamber

Info

Publication number: CN201292263Y
Application number: CNU2008201242578U
Authority: CN
Inventors: 李冬; 朱兆亮; 曹相生; 张�杰
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2008-12-05
Filing date: 2008-12-05
Publication date: 2009-08-19
Anticipated expiration: 2018-12-05

Abstract

The utility model relate to a vertical flow type aerophil air-bearing filter chamber which belongs to a water treatment device. The vertical flow type aerophil air-bearing filter chamber is characterized in that a water inlet pipe and a dissolved gas backflow water pipe are fixed at the bottom of the filter chamber, and a dissolved gas releaser is mounted at the tail end of the dissolved gas backflow water pipe; slag-floating troughs are respectively arranged at the top of the filter chamber, a backwash waste water trough is arranged at the lower part of the dissolved gas separation region, and a piercing gas distribution pipe and a water collector pipe are embedded at the bottom of either material-filtering layer; the piercing gas distribution pipes are respectively connected with an aerated gas pipe and a backwash gas pipe, and the water collector pipes and water outlet pipes are respectively connected with backwash water inlet pipes. The vertical flow type aerophil air-bearing filter chamber combines physical treatment (dissolved gas) and biological treatment (aerophil filter chamber) to form an integrated device, the dissolved gas can further remove substances, such as sludge fragments, rubber particles, algae, and the like with densities approximate to water, and high-dissolved oxygen in the emergence of the dissolved gas supplies biological oxygen to the aerophil filter chamber which take the functions of physical retention, absorption and biodegradation for polluted substances so as to further purify water quality.

Description

Vertical-flow good Airfloat filtering pond

Technical field

The utility model belongs to a kind of water treatment device, relates to source water and handles and the advanced treatment of wastewater field.

Background technology

At present, coagulation+precipitation+filtration common process is generally adopted in the processing of advanced treatment of wastewater and source water, though this technology can effectively be removed suspended substance, pollution substances such as BOD, COD in the water, but indexs such as nutrition such as the nitrogen in the water outlet and algae can not satisfy corresponding water quality standard, and the technology floor space is big, complex management.

The utility model content

The purpose of this utility model is to overcome the shortcoming of common process, and a kind of novel water treatment device is provided.This device combines physical treatment (air supporting) and biological treatment (good air filter pond), forms integrated apparatus.Air supporting can approach density materials such as the mud fragment, colloidal solid, algae of water and further remove, high-solubility oxygen provides biological aerobic for good air filter pond in the water outlet of air supporting simultaneously, good air filter pond to pollution substance play that physics is held back, absorption and biodegradable function, thereby further purify water.

The technical solution of the utility model is as follows:

Vertical-flow good Airfloat filtering pond, it relates to a kind of improvement of floating filter structure, is to be modified into to increase aerating apparatus in vertical-flow on the basis of traditional flat flow floating filter, improves the biological treatment function.

The vertical-flow good Airfloat filtering pond of the utility model, it is characterized in that: water inlet pipe 1, molten gas backflow water pipe 2 are fixed on the bottom, filter tank, end at molten gas backflow water pipe 2 is installed dissolved air release 8, the top, filter tank is provided with scum

silica frost groove

6,12 bottoms are provided with backwash waste groove 7 in the flotation separation zone, bury perforation gas distribution pipe 9 and header 10 underground in filter material layer 13 bottoms, its middle punch gas distribution pipe 9 is connected with aeration, backwash tracheae 5, and header 10 is connected with rising pipe 3 and backwash water inlet pipe 4.

This device with have water treatment device now and compared following advantage:

1, the air flotation pool of this device employing is compared with settling tank, is easy to remove the algae substances of suspended sludge fragment, colloidal solid and more difficult coagulating sedimentation in the secondary effluent, and also molten gas oxygenation in water outlet simultaneously is beneficial to the biochemical reaction in the follow-up good air filter pond.

2, this device has adopted the air filter pond to be similar to BAF, but filteration is more emphasized in good air filter pond, under the prerequisite that keeps the original filtration turbidity removal of conventional rapid filter function, increases aerating apparatus simultaneously, strengthen its biological action, strengthen the removal effect of filter tank indexs such as organism and ammonia nitrogens.

3, the employing of this device is vertical-flow compares with flat flow, the surface load height, and floor space is little, and it is little to the disengaging zone influence to scrape slag equipment, the effluent characteristics height.

4, the air flotation pool air filter pond of becoming reconciled is combined as a whole, and is reasonable in design, compact construction, convenient management and using.

Description of drawings

Fig. 1 is the utility model structure iron.

Embodiment

Concrete operations are as follows:

1, air-float filtration process: water inlet pipe 1 is from the water outlet of flocculation reaction, molten gas backflow water pipe 2 from the water outlet of floating filter by dissolved air water (the dissolved-air pressure 392kPa behind the molten gas of gas-liquid mixing pump, reflux ratio 40%), the two together enters air supporting zone of action 11 at the bottom of the pond, and upflow velocity is 11mm/S.Flco after the flocculation contacts with the bubble hit that dissolved air water disengages by reliever 8 and forms bubble-wadding burl zoarium, the two rises to flotation separation zone 12 and separates, decline flow velocity in disengaging zone is 1.4mm/S, scum silica frost overflows into scum silica frost groove 6 and discharges, the air supporting water outlet is by the filter material layer 13 in filter tank, filtering velocity is 4m/h, there is physics to hold back at filter material layer, adsorption, high-solubility oxygen in the water outlet of air supporting simultaneously provides aerobic environment for biological degradation, the insufficient oxygen of nitration reaction is replenished by aeration tube 5, be evenly distributed in the filtering layer through perforation gas distribution pipe 9, aeration rate is controlled at 100L/h, and last water outlet is collected through rising pipe 3 by header 10 and flowed out.

2, the backwash process of Airfloat filtering pond: when filter tank maximum head loss surpasses 1m, the filter end cycle need carry out the normal water outlet that backwash comes assurance device.Backwash process adopts air water associating backwash: backwash tracheae 5 is from aerating system, and backwash water pipe 4 provides from filter back water positive delivery or by elevated tank, and backwash waste is discharged through wastewater trough 7.The back flushing parameter is: gas is towards intensity 11.1L/m separately ²S, flushing 3min; Associating gas is towards intensity 11.1L/m ²S, water is towards intensity 4.5L/m ²S, flushing 6min; Water rinse intensity 8.9L/m ²S, rinsing time 5min.

As seen from Table 1, by vertical-flow good Airfloat filtering pond integrated apparatus, secondary effluent water quality is largely increased, except that the bacterium index need increase disinfect, all other indexs have reached the reuse water water-quality guideline.

The vertical-flow good Airfloat filtering pond of Sewage Plant secondary effluent and process is handled back effluent quality and clearance situation such as following table 1:

Index	Turbidity/NTU	Colourity/degree	UV ₂₅₄ /cm ^-1	COD /mg/L	NH ₃-N /mg/L	TP /mg/L	Total plate count/10 ⁴Individual ml ^-1
Index	Turbidity/NTU	Colourity/degree	UV ₂₅₄ /cm ^-1	COD /mg/L	NH ₃-N /mg/L	TP /mg/L	Total plate count/10 ⁴Individual ml ^-1	Secondary effluent	4-15	100-150	0.12-0.27	50-80	15-70	1-5	13-22
Good Airfloat filtering pond water outlet	0.5-2.6	29.7-51. 7	0.03-0.17	22.5-35.2	0.4-15	0-0.8	3.9-6.1	Secondary effluent	4-15	100-150	0.12-0.27	50-80	15-70	1-5	13-22
Good Airfloat filtering pond water outlet	0.5-2.6	29.7-51. 7	0.03-0.17	22.5-35.2	0.4-15	0-0.8	3.9-6.1	Clearance (%)	78	65	46	47	80	83	63

Claims

1. vertical-flow good Airfloat filtering pond, it is characterized in that: water inlet pipe, molten gas backflow water pipe are fixed on this bottom, filter tank, end at molten gas backflow water pipe is installed dissolved air release, this top, filter tank is provided with the scum silica frost groove, in the bottom, flotation separation zone the backwash waste groove is set, bury perforation gas distribution pipe and header underground in the filter material layer bottom, its middle punch gas distribution pipe is connected with aeration, backwash tracheae, and header is connected with rising pipe and backwash water inlet pipe.