CN2356031Y

CN2356031Y - Methane fermentation device

Info

Publication number: CN2356031Y
Application number: CN98250710U
Authority: CN
Inventors: 杨大祥; 王传明; 吴国林
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-16
Filing date: 1998-12-16
Publication date: 1999-12-29
Anticipated expiration: 2008-12-16

Abstract

The utility model discloses a methane fermenting device, comprising a methane anaerobic fermenting device. A precipitating device is arranged in front of the methane anaerobic fermenting device; a filtering device is arranged behind the methane anaerobic fermenting device; the back part of the filtering device is provided with a sewage discharge opening; the precipitating device is provided with a passage which is on the position slightly lower than the middle part of the precipitating device and is communicated with the bottom of the methane anaerobic fermenting device; an outlet on the bottom of the methane anaerobic fermenting device is communicated with an inlet on the bottom of the filtering device. The utility model can reasonably convert domestic sewage into methane and carry out filtering and purifying processing in the process of continuously discharging domestic sewage for causing domestic sewage to reach sewage discharge standard specified by environmental protection departments, and the utility model is especially suitable for comparatively concentrated town residents.

Description

Biogas fermentation device

The utility model relates to a kind of biogas fermentation device

At present, the biogas fermentation device in China cities and towns mostly is simple buried Steel Concrete and builds up, promptly at the underground device of building a sealing, on this device, be provided with opening for feed and biogas extraction catheter, open opening for feed, to be rich in these devices of packing into such as organic sewage, ight soil, close opening for feed then, and with its sealing, under anaerobic, after fermentation after a while, can produce biogas, this biogas generating device must often open and close opening for feed and change fresh sewage, biogas is incurred loss, and it is cumbersome to operate.In cities and towns, the sanitary sewage in cities and towns is mostly again to be directly to enter water drain without any processing, owing to have a lot of objectionable impuritiess in the sewage, has therefore seriously polluted environment more, is one of the main public hazards in city.

The purpose of this utility model is to provide a kind of sanitary sewage in city generation biogas that ferments that utilizes, and simultaneously sewage is carried out filtration, purification and handles, and makes it to reach national specified discharge standard, but and makes the biogas fermentation device of sewage continuous blow-down.

In order to achieve the above object, biogas fermentation device described in the utility model comprises the biogas anaerobic fermentation device, is provided with settler before the biogas anaerobic fermentation device, behind the biogas anaerobic fermentation device, be provided with filtration unit, be provided with Sewage outlet at the rear portion of filtration unit; Settler middle part has passage to communicate with the bottom of biogas anaerobic fermentation device on the position under slightly, and the outlet at bottom of biogas anaerobic fermentation device and the bottom inlet of filtration unit communicate.

Filtration unit in the biogas fermentation device described in the utility model sets up one-level filtration unit and cascade filtration device separately, is provided with liner between one-level filtration unit and cascade filtration device.

Owing to adopted the technical solution of the utility model, sanitary sewage in the city has obtained sufficient purifying treatment in settler and filtration unit, and be rich in organic sewage, in the biogas anaerobic fermentation device, fully ferment and produce a large amount of biogas, have when producing biogas, sewage to the city purifies, and does not influence the advantage of the continuous blow-down of sanitary sewage.Sewage for the Residential areas in the city focuses on especially suitable.

Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is described in further detail:

Fig. 1 is the longitudinal section of biogas fermentation device described in the utility model;

Fig. 2 is that the described biogas fermentation device of Fig. 1 is along I-I line sectional view.

By Fig. 1, Fig. 2 as seen, be rich in organic sanitary sewage and at first enter settler 2 through blow-off line 1, in settler 2, the stone that density is bigger, foreign material such as desilting precipitate in settler 2, residue sewage flows into biogas anaerobic fermentation device 5 naturally through passage 3, under the anaerobic condition of sealing, be rich in organic sewage through microbial process, produce biogas by fermentation, various parasites simultaneously, ovum is death by suffocation under anaerobic, the biogas that produces enters biogas pipeline from the biogas extraction catheter 4 on anaerobic ferment devices 5 tops, the sewage that the process anaerobically fermenting is crossed, because constantly pouring in of new sanitary sewage makes the bottom nature inflow filter of sewage from filtration unit, sets up one-level filtration unit 6 and cascade filtration device 8 in the filtration unit separately.Between one-level filtration unit 6 and cascade filtration device 8, be provided with liner 7, sewage enters from the bottom of one-level filtration unit 6, reverse filtering layer by forming by nylon rope and brown sheet, remove the suspended substance in the decontaminated water, and flow out from the outlet of high bit, by entering cascade filtration device 8 again from the bottom after liner 7 changed courses, and reverse once more filtering layer by forming by Calucium Silicate powder rubble, gac or coal ash slag, discharge from the Sewage outlet 10 of high bit, above Sewage outlet 10, be provided with sewage thief hole 9, so that sewage is monitored at any time.

Because the sewage outlet of one-level filtration unit 6 is higher than the sewage import, and is higher than the sewage import of biogas anaerobic fermentation device 5, like this, in one-level filtration unit 6, form the suitably water seal of height, can prevent that the biogas in the anaerobic ferment devices 5 from revealing.

Sewage through after the processing of I and II filtration unit has reached the secondary standard of national GB8978-88 " integrated wastewater discharge standard " and the corresponding requirements of GB7959-87 " decontamination of human excreta hygienic standard ", can directly enter water drain.

In the I and II filtration treatment of sewage,, can suitably increase the number of second-stage treatment device 8 or the thickness of increase filtering layer, to reach sewage drainage standard degree of being if filtered sewage does not reach emission request.

Biogas anaerobic fermentation device 5 can suitably increase volume according to the size of the usage quantity of the treatment capacity of sewage and biogas or increase the quantity of biogas anaerobic fermentation device 5.

Settler 2 and biogas anaerobic fermentation device are drawn clearly once for 5 general every year, and filtering material cleaning in per 3 years or replacing once also can determine to draw clearly or change the time of filtering material according to practical situation, to keep biogas generating device works better degree of being.

Various device described in the utility model can adopt materials such as timber, steel plate, glass reinforced plastic, engineering plastics to make, and also can make of other material.

Claims

1, a kind of biogas fermentation device, comprise the biogas anaerobic fermentation device, it is characterized in that: at the preceding settler (2) that is provided with of biogas anaerobic fermentation device (5), behind biogas anaerobic fermentation device (5), be provided with filtration unit, be provided with Sewage outlet (10) at the filtration unit rear portion, settler (2) middle part has passage (3) to communicate with the bottom of biogas anaerobic fermentation device (5) on the position under slightly, and the outlet at bottom of biogas anaerobic fermentation device (5) communicates with the bottom inlet of filtration unit.

2, biogas fermentation device according to claim 1 is characterized in that: described filtration unit sets up one-level filtration unit (6) and cascade filtration device (8) separately, is provided with liner (7) between one-level filtration unit (6) and cascade filtration device (8).

3, biogas fermentation device according to claim 2 is characterized in that: the filtering layer of one-level filtration unit (6) is that nylon rope and brown sheet constitute, and the filtering layer of cascade filtration device (8) is formations such as Calucium Silicate powder rubble, gac or coal ash slag.

4, biogas fermentation device according to claim 2 is characterized in that: in described one-level filtration unit (6), water outlet is higher than water-in, and is higher than the water-in of biogas anaerobic fermentation device (5), promptly forms water seal in the one-level filtration unit.

5, biogas fermentation device according to claim 1 is characterized in that: the top of the Sewage outlet behind filtration unit (10) is provided with sewage thief hole (9).