CN100412003C

CN100412003C - Aerating biological filter

Info

Publication number: CN100412003C
Application number: CNB2006100689490A
Authority: CN
Inventors: 刘建广; 张春阳
Original assignee: Shandong Jianzhu University
Current assignee: Shandong Jianzhu University
Priority date: 2006-09-25
Filing date: 2006-09-25
Publication date: 2008-08-20
Anticipated expiration: 2026-09-25
Also published as: CN1923724A

Abstract

The invention discloses an aerating biological filter pool in the water disposal device domain, which comprises the following parts: filter pool within aerating device and filtering device, water inlet pipe on the bottom of filter pool, backwash drainage pipe on the bottom of filter pool, pulse air-chamber to interconnect bottom of filter pool through backwash inlet pipe and vent pipe, wherein the vent pipe lies in one end of water sealing pipe in the pulse air-chamber; the other end of vent pipe connects gas-water separator, whose top possesses connection pipe with bottom interconnecting the bottom of pulse air-chamber through connection pipe.

Description

BAF

Technical field

The present invention relates to a kind of waste disposal plant, relate in particular to a kind of BAF.

Background technology

Many at present employing Up-flow Biological Aerated Filter are disposed of sewage.The subject matter that existing Up-flow Biological Aerated Filter exists is: behind its operation certain hour, the dirt of holding back in the filtering layer and the microbial film of growth increase filtration resistance, must carry out back flushing to BAF; In order to address this problem, at present the BAF that some have back flushing mechanism has appearred, but its structure more complicated, the manufacturing cost height; And its backwash water amount is big, waste water resource.

Summary of the invention

The present invention be directed to the existing in prior technology shortcoming, and providing a kind of simple in structure, low cost of manufacture can reduce water consumption, the technical scheme of environmental protection, the BAF that has the pulsed back-purge system had both guaranteed backwash effect, had reduced the backwash water amount again.

The present invention realizes by following technical measures: it comprises the filter tank, be provided with aerating apparatus and filtration unit in the filter tank, the bottom, filter tank is provided with water inlet pipe and sewage backwash pipe, be provided with the pulse air chamber that communicates with the filter tank in the bottom in filter tank, the pulse air chamber is provided with recoil inlet pipe and the vapor pipe that is communicated with the pulse air chamber, an end that is positioned at the pulse air chamber of vapor pipe is positioned at syphon trap, the other end of vapor pipe is communicated with air water separator, air water separator top is provided with ventpipe, the bottom of air water separator by communicating pipe the bottom with the pulse air chamber be communicated with.Under the certain condition of filter tank volume and height, liquid packing volume and height and recoil atmospheric pressure and flow, the time that forming pulse automatically needs also is certain, therefore can determine that air recoils the time according to the number of times of pulse.In like manner the volume in filter tank and height, liquid packing volume and height and recoil atmospheric pressure and flow also can manufacture and design as required.When needing the back flushing concrete operations, close the sewage water inlet pipe valve, open the recoil blast main, air constantly enters the pulse air chamber, water level in the pulse air chamber constantly descends under pressure, water is forced in the pond, when water level drops to the liquid packing top, water level in the liquid packing begins to descend, water wherein is discharged in the air water separator by vapor pipe, and flow back into Chi Tizhong, when the water level in the liquid packing drops to the mouth of pipe place of vapor pipe, pressurized air in the pulse air chamber enters in the air water separator by vapor pipe rapidly, air enters in the atmosphere by ventpipe, the less water of taking out of enters behind the air water separator by communicating pipe turning back to Chi Tizhong, because the pressure in the pulse air chamber descends rapidly, and the water level of Chi Tizhong is much higher than the water level of pulse air chamber, therefore, the water level of pulse air chamber rises rapidly, and a large amount of clear water is instantaneous to flow through filtering layer by filter from the top down, and filtering layer is formed quick impact and scrubs, can break up the filtering layer of compacting, rinse out the dirt in the filtering layer, when the water level in the pulse air chamber rises to when flooding liquid packing, the pulsatile once flushing finishes.Along with entering continuously of recoil air, can constantly form multiple pulses, filtering layer is cleaned preferably, under the certain condition of pond body size, liquid packing height and recoil air flow quantity, automatically the time that forming pulsatile once needs also is certain, therefore can determine the air recoil time by pulse number as required.Close the back flushing blast main, quiet heavy certain hour sinks at the bottom of the pond suspended substance in the filtering layer lower space, opens the sewage backwash pipe, goes into water purification from the pond teeming simultaneously, and filtering layer is cleaned, and backwash process finishes.The key of backwash process is the flushing of multiple pulses to filtering layer, has both guaranteed backwash effect, has reduced the backwash water amount again.

Above-mentioned vapor pipe is positioned at the bottom of an end of syphon trap near syphon trap during specific design, can make full use of the space and the height of syphon trap like this, the water in the syphon trap can be discharged as much as possible simultaneously, strengthens the effect of flushing.

At the inwall in filter tank and be provided with the water purification effluent trough above filtration unit, effluent trough is provided with the water purification rising pipe that communicates with effluent trough.What adopt like this is the mode that the upward flow aeration and biological purifies.

Filtration unit comprises the filtering layer of the top of the aerating apparatus that is arranged on inside, filter tank, is provided with filter plate on the top of filtering layer, and filter plate is provided with filter.

The lower end of filter probes in the filtering layer, and the upper end is higher than plane on the filter plate.

Above-mentioned filter tank and pulse air chamber can be designed as shared one and face the wall and meditate, and are communicated with by water hole.Like this can simplified construction.

The beneficial effect of this programme can be learnt according to the narration to such scheme, the present invention is simple in structure, and low cost of manufacture can water saving, the technical scheme that has the BAF of pulsed back-purge system had both guaranteed backwash effect, had reduced the backwash water amount again.

Description of drawings

Fig. 1 is the structural representation of the specific embodiment of the invention.

Among the figure, 1, water inlet pipe, 2, aerating apparatus, 3, the water purification rising pipe, 4, back flushing water inlet pipe, 5, the sewage backwash pipe, 6, effluent trough, 7, filter plate, 8, filter, 9, filtering layer, 10, filter tank, 11, water hole, 12, the pulse air chamber, 13, liquid packing, 14, vapor pipe, 15, air water separator, 16, communicating pipe, 17, the recoil inlet pipe, 18, ventpipe.

Embodiment

For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.

The present invention is a kind of BAF.It comprises filter tank 10 as described in Figure 1, be provided with aerating apparatus 2 and filtration unit in the

filter tank

10,10 bottoms, filter tank are provided with water inlet pipe 1,10 bottoms, filter tank are provided with sewage backwash pipe 5, the bottom in filter tank 10 is provided with the pulse air chamber 12 that communicates with filter tank 10, filter tank 10 and pulse air chamber 12 specifically can be designed as shared one and face the wall and meditate, and are communicated with by water hole 11.Pulse air chamber 12 is provided with recoil inlet pipe 17 and the vapor pipe 14 that is communicated with pulse air chamber 12, an end that is positioned at pulse air chamber 12 of vapor pipe 14 is positioned at the bottom of the close liquid packing 13 of liquid packing 13 and its end, the other end of vapor pipe 14 is communicated with air water separator 12, air water separator 15 tops are provided with ventpipe 18, and the bottom of air water separator 15 is by being communicated with the bottom of pulse air chamber 12 communicating pipe 16.At the inwall in filter tank 10 and be provided with water purification effluent trough 6 above filter 8, effluent trough is provided with the water purification rising pipe 3 that communicates with effluent trough 6.Above-mentioned filtration unit can adopt following structures: it comprises the filtering layer 9 of the top of the aerating apparatus 2 that is arranged on 10 inside, filter tank, be provided with filter plate 7 on the top of filtering layer 9, filter plate 7 is provided with filter 8, and the lower end of filter 8 probes in the filtering layer 9, and the upper end is higher than the last plane of filter plate 7.The water inlet pipe 4 that is used for back flushing on filter tank 10, can be equipped with.Like this back flushing can close recoil blast main 17 at last, close sewage water inlet pipe 1 simultaneously, open recoil blow-off pipe 5, the water inlet pipe 4 of 10 tops injects water purification from the filter tank, filter tank 10 is washed get final product.

Claims

1. BAF, it comprises filter tank [10], be provided with aerating apparatus [2] and filtration unit in the filter tank [10], bottom, filter tank [10] is provided with water inlet pipe [1], it is characterized in that, bottom, described filter tank [10] is provided with sewage backwash pipe [5], the bottom in filter tank [10] is provided with the pulse air chamber [12] that communicates with filter tank [10], pulse air chamber [12] is provided with recoil inlet pipe [17] and the vapor pipe [14] that is communicated with pulse air chamber [12], the end that vapor pipe [14] is positioned at pulse air chamber [12] is positioned at syphon trap [13], the other end of vapor pipe [14] is communicated with air water separator [15], air water separator [15] top is provided with ventpipe [18], and the bottom of air water separator [15] is by being communicated with the bottom of pulse air chamber [12] communicating pipe [16].

2. BAF according to claim 1 is characterized in that, described vapor pipe [14] is positioned at the bottom of an end of syphon trap [13] near syphon trap [13].

3. BAF according to claim 1 and 2 is characterized in that, the inwall of [10] and above filtration unit, be provided with water purification effluent trough [6] in the filter tank, and effluent trough [6] is provided with the water purification rising pipe [3] that communicates with effluent trough [6].

4. BAF according to claim 1 and 2, it is characterized in that, described filtration unit comprises the filtering layer [9] of the top that is arranged on the inner aerating apparatus [2] in filter tank [10], is provided with filter plate [7] on the top of filtering layer [9], and filter plate [7] is provided with filter [8].

5. BAF according to claim 4 is characterized in that, the lower end of described filter [8] probes in the filtering layer [9], and the upper end is higher than filter plate [7] and goes up the plane.

6. BAF according to claim 1 and 2 is characterized in that, described filter tank and pulse air chamber shared are faced the wall and meditated, and is communicated with by water hole [11].