CN2460518Y

CN2460518Y - Micro-pollution raw water and sewage treatment device for water supply

Info

Publication number: CN2460518Y
Application number: CN 00216746
Authority: CN
Inventors: 邹伟国
Original assignee: SCIENT RESEARCH I SHANGHAI MUN
Current assignee: SCIENT RESEARCH I SHANGHAI MUN
Priority date: 2000-03-08
Filing date: 2000-03-08
Publication date: 2001-11-21
Anticipated expiration: 2010-03-08

Abstract

The utility model relates to a new style micro-pollution raw water and sewage treatment device. The utility model is mainly applicable to organic substances and ammonia nitrogen treatment of micro pollution raw water and sewage of waterworks. The utility model is composed of a water and gas inlet zone, a lightweight filter layer, a water outlet pipe and a pulse back flushing structure. Lightweight filter materials are used as filter materials, a gas and water up-flow form and a back flush of a pulse back flushing form are used when the utility model runs. The utility model has the advantage that the filter materials have a larger specific surface area. The utility model is suitable for the growth of microbes, and has the characteristics of wide sources and low price. The utility model has higher processing effect on ammonia nitrogen and organic substances in water. The utility model can effectively prevent raw water from clogging, has the advantages of better back flushing effect and little water and gas consumption. The utility model also has the advantage that no back flushing water pump is not needed in the process of back flushing.

Description

Feedwater micro-polluted raw and waste disposal plant

The utility model relates to a kind of micro-polluted raw pre-treatment and waste disposal plant, mainly is applicable to the removal of organism, ammonia nitrogen and SS in waterworks micro-polluted raw pre-treatment and the sewage, improves effluent quality.

At present, the water source of waterworks has been subjected to pollution in various degree, the continuous increase of the value volume and range of product of organic pollution materials more and more causes people's attention in the former water, organism causes microbial reproduction easily, cause the raising of smelling flavor and colourity of output water, when the ammonia nitrogen in the water is higher, can cause water body smelly, conventional processing is to the organism in the water, processing such as ammonia nitrogen have certain limitation, in real work in the past, measures such as common employing long distance water diversion are to dodge micro-polluted raw, though water quality makes moderate progress, but often construction investment is big, and some place can not find water source preferably, and biological treatment is a method preferably in that micro-polluted raw is handled.In sewage disposal, except removing BOD ₅, COD _CrCarbon containing organic contamination beyond the region of objective existences such as SS, must reach emission standard to the ammonia nitrogen that causes body eutrophication, therefore a lot of Sewage Plant adopt the biological ceramic particle filter tank more, there is into water in general filter tank, the gas area, filter material layer, rising pipe and back flushing water shoot are formed, wherein filtrate adopts ceramic grain filter more, this filtrate price is higher, stops up for preventing in the operational process, adopt down to stream more, owing to be subjected to air water reverse flow condition restriction, head loss is big, and filtration velocity is low, and capital cost is higher, floor space is big, adopt the high strength water backwashing during back flushing, so shortcoming such as the back flushing water loss is bigger is difficult to extensive use in engineering.

The purpose of this utility model provides a kind of feedwater micro-polluted raw treatment unit, it can be used to feed water micro-polluted raw pre-treatment and sewage disposal, ammonia nitrogen, organism and SS remove efficient in the water to improve, have that head loss is little, filtration velocity is high, back flushing water consumption, advantage such as narrow-minded, can effectively reduce engineering cost and floor space.

Be real above-mentioned purpose, this device is mainly intake by the bottom, the territory, gas area, the lightweight filtering layer, rising pipe and pulse backwashing contexture, wherein water inlet, the territory, gas area, rising pipe is consistent with conventional haydite filter tank, aspect filtering layer, light filter materials such as device employing foamed polystyrene particle EPS are as filler, adopt cover plate (filter is housed) opposing filtrate buoyancy above, this filtrate low price, wide material sources because particle diameter of filter medium is less, have bigger specific surface area, filling surface has a large amount of microbial films, heterotrophic microorganism on the filler utilizes the organism in the water, ammonia nitrogen carries out metabolism, and therefore device is to the ammonia nitrogen in the water, organism has the high processing effect, and a part was trapped after the turbidity (SS) in the water filtered through filtering layer simultaneously.During operation, G﹠W enters from filter tank bottom, adopts the air water concurrent, during incorgruous relatively stream, can effectively reduce vapour lock, and it is less to reduce head loss, and the while filtration velocity can improve, so plant area area and engineering cost all can be reduced.

Aspect back flushing, high strength water backwashing method is generally adopted in conventional haydite filter tank, water loss is bigger, this device is according to the characteristics of filtrate light specific gravity, adopt the form of pulse backwashing, by increasing by an air bag in bottom, filter tank or next door, cystoblast communicates by hollow tube with the filter tank, during back flushing, at first pressurized air enters air bag, make air bag reach certain volume after, the instantaneous gas of opening in the purging valve door knob air bag is derived, because gas flow rate is very fast, makes that the water in the filtering layer is supplemented to rapidly in the air bag by hollow tube, causes water outlet that filtering layer is carried out the short period of time, high-intensity water backwashing, reach the biomembranous purpose of effective renewal, promptly form pulse backwashing, this backwash mode water loss after several times back and forth, tolerance is less, and does not need the special-purpose water pump of back flushing.

The utility model is compared with the biological filter of routine, has the following advantages:

1, to have specific surface area big for the filtrate that adopts of this device, suitable attached growth of microorganisms, and wide material sources, low price.

2, adopt the air water concurrent, the filtering layer resistance is little, owing to adopt upward flow, filtering layer is difficult for stopping up, and even water distribution.

Advantages such as 3, the pulse process of washing that adapts with filtrate is adopted in the filter tank, and this purging method has water consumption, narrow-minded, and developing result is better are the key problem in technology of this treatment process.

Below in conjunction with accompanying drawing and example the utility model is further specified.

Fig. 1 is the device unit sectional view of the utility model example one;

Fig. 2 is the device unit sectional view of the utility model example two;

Among the figure: 1. water inlet pipe 2. rising pipes 3. shore pipes 4. back flushing inlet pipe

5. eduction pipe 6. boring aeration pipes 7. air bags 8. water inlets, territory, gas area

9. lightweight filtering layer 10. cover plates 11. fall filter 12. hollow tubes

13. clear water zone 14. concrete slabs, 15. perforated pipes

In Fig. 1, water inlet pipe (1), shore pipe (3), back flushing inlet pipe (4) and boring aeration pipe (6) are positioned at the device bottom, at the device middle part is light filter material layer (9), its thickness is decided according to flooded condition, device top with concrete or steel deck-plate (10) with the buoyancy that stops light filter material layer (9) and the resistance of operation, filter (11) is housed down on the cover plate allows current pass through, form upwards enclosed areas in the filter material layer bottom by hollow tube (12) and concrete slab (14), promptly when back flushing, can form air bag (7) at the closed region bubbling air, the quantity of hollow tube (12) and the adjustable scale of length device are whole, and device top is clear water zone (13) and rising pipe (2).

When normal operation, the former water that needs to handle is in water inlet pipe (1) access to plant, air enters filtering layer by boring aeration pipe (6), replenish the needed oxygen of biological action, owing to have a large amount of microorganisms in the filtering layer (9), organism in the water and ammonia nitrogen can be removed in filtering layer (9) preferably, water after the processing is through entering clear water zone territory (13) behind the filter (11), discharge by rising pipe (2), filtrate adopts the polystyrene filtrate, these filtrate wide material sources, and low price, 1/5 of the material filtrate price of making pottery approximately, and filtrate has bigger surface-area, be fit to microorganism growth, during operation, water and air adopts concurrent, form vapour lock at filtering layer in the time of can avoiding incorgruous stream, the drag losses of filtering layer (9) reduces greatly, and the resistance of filtering layer (9) can impel inlet distribution even simultaneously, can effectively prevent the obstruction of suspended matter in the former water.

During back flushing, at first close water intaking valve (1), open back flushing inlet pipe (4), under the pressure effect of air, form air bag (7) in the closed region, bottom, air admission filter tank, the air displacement water that comes out enters the filter tank by hollow tube (12), Deng the certain back of air bag (7) thickness (it is fixed that balloon thickness is looked thickness of filter bed), this moment is by the automatic or manual instantaneous purging valve (5) of opening, air in the air bag (7) is discharged in the atmosphere rapidly by purging valve (5) under effect of water pressure, the water in clear water zone this moment (13) is rapidly by falling filter (11), filtering layer (9) and hollow tube (12) add to air bag (7), because the air intestine evacuation velocity in the air bag (7) is very fast, cause device to form high-intensity water filtering layer (9) is washed downwards, thereby reach high strength in moment, short period of time repeats above process to the purpose of filtering layer (9) flushing, can reach the purpose of multiple pulses flushing, after the pulse flushing finished, static for some time was by opening the mud of mud valve (3) discharger bottom.

In another example shown in Figure 2, make by concrete the closed region, be communicated with the device bottom by perforated pipe (15), during back flushing in the closed region bubbling air form air bag (7), the instantaneous then purging valve (5) of opening, water replenishes the formed vacancy of air by perforated pipe (15) in the filter tank, causes the purpose that filtering layer is formed moment high strength back flushing.

Claims

1, a kind of feedwater micro-polluted raw and waste disposal plant, by water inlet, territory, gas area, lightweight filtering layer, rising pipe and pulse backwashing contexture, it is characterized in that: lightweight filtering layer (9) adopts synthetic polystyrene (EPS) particle, device top is provided with cover plate (10), filter (11) is housed on the cover plate (10), and lightweight filtering layer (9) is located at below the cover plate; Pulse backwashing structure is that the closed region is set in device is air bag (7), is provided with back flushing inlet pipe (4) and eduction pipe (5) at air bag (7) top, also can establish water inlet pipe (1) and shore pipe (3) as required in the air bag bottom;

2, device according to claim 1, it is characterized in that: air bag (7) is located at bottom of device, form air bag (7) by concrete slab (14) and device wall, the air bag top is communicated with employing and is provided with some amount hollow tube (12) on concrete slab (14) with device, hollow tube (12) stretches to air bag (7) bottom;

3, device according to claim 1 is characterized in that: air bag (7) is located at by the device, forms air bag (7) by concrete, and the air bag bottom is communicated with device adopts some amount perforated pipe (15);